CN117614088A - Power processing circuits, methods and electronic devices - Google Patents

Abstract

This application provides a power processing circuit, method and electronic device, which can improve battery life by improving battery power conversion efficiency. The circuit includes: a first switched capacitor module, the first switched capacitor module is connected to the battery, the first switched capacitor module is used to obtain the battery voltage, and adjust the battery voltage to a first voltage; a DC converter, the DC converter is connected to the first DC converter respectively. A switched capacitor module is connected to an electrical load, and the DC converter is used to obtain the first voltage output by the first switched capacitor module, adjust the first voltage to a second voltage, and output the second voltage to the electrical load; wherein, the first The absolute difference between the voltage and the second voltage is smaller than the absolute difference between the battery voltage and the second voltage.

Description

Power processing circuits, methods and electronic devices

Technical field

The present application relates to the technical field of electronic equipment, and in particular, to a power processing circuit, method and electronic equipment.

Background technique

During the use of terminal equipment, the battery provides electric energy to the components of the terminal equipment to ensure the normal operation of each component, making the battery an important component of the terminal equipment.

However, batteries in the prior art have low power conversion efficiency, resulting in poor battery life.

Therefore, how to improve the power conversion efficiency of batteries has become an urgent technical issue to be solved.

Contents of the invention

In order to solve the above technical problems, this application provides a power processing circuit, method and electronic equipment. In the embodiment of the present application, the endurance of the battery can be improved by improving the power conversion efficiency of the battery.

In a first aspect, this application provides a power processing circuit for use in electronic equipment. The electronic equipment includes a battery and a power load. The power management circuit includes: a first switched capacitor module, the first switched capacitor module is connected to the battery, and the first switch The capacitor module is used to obtain the battery voltage and adjust the battery voltage to the first voltage; the DC converter is connected to the first switched capacitor module and the electrical load respectively, and the DC converter is used to obtain the output of the first switched capacitor module. the first voltage, adjusting the first voltage to the second voltage, and outputting the second voltage to the electrical load; wherein the difference between the first voltage and the second voltage is smaller than the difference between the battery voltage and the second voltage.

Through the power processing circuit, the first switched capacitor module can adjust the battery voltage to the first voltage and then output it to the input end of the DC converter. At this time, the DC converter can adjust the first voltage to the second voltage and then provide the electrical load. Provide electrical energy. Compared with the solution in which the DC converter adjusts the battery voltage to the second voltage, since the difference between the first voltage and the second voltage is smaller than the difference between the battery voltage and the second voltage, the power processing circuit provided by the embodiment of the present application The voltage difference between the two ends of the DC converter is reduced, and the conversion efficiency of the DC converter to battery energy is improved, thus improving the battery life.

Exemplarily, the first switched capacitor module may include a second switched capacitor circuit, a second capacitor C2 and a fifth switch S5. The second switched capacitor circuit may include first to fourth switches S1 to S4 connected in series. For example, the second switched capacitor circuit may be a voltage converter using a capacitor as an energy storage element.

For example, the DC converter may be a voltage converter using an inductor as an energy storage element. For example, the DC converter may include one or more of a first buck (BUCK) converter, a boost (BOOST) converter, and a boost-buck (BOOST-BUCK) converter.

Wherein, the first buck converter is used to step down the input voltage to obtain an output voltage with a fixed voltage value.

Among them, the boost converter is used to boost the input voltage to obtain an output voltage with a fixed voltage value.

Illustratively, the absolute difference between the first voltage and the second voltage is smaller than the absolute difference between the battery voltage and the second voltage. For example, for a buck converter, the difference between the first voltage and the second voltage is smaller than the difference between the battery voltage and the second voltage. For another example, for a boost converter, the difference between the second voltage and the first voltage is smaller than the difference between the second voltage and the battery voltage.

For example, one end of the first switched capacitor module is connected to the battery, the other end of the first switched capacitor module is connected to the input end of the DC converter, and the output end of the DC converter is connected to the electrical load.

For example, the battery voltage may range from 3V to 4.5V.

For example, the electrical load may include a first electrical load connected to the buck converter, and a second electrical load connected to the boost converter. For example, the second electrical load can be a speaker, audio power amplifier (PowerAmplifier, PA), radio frequency PA, display screen, etc.

According to the first aspect, the DC converter includes a first buck converter, the first voltage includes a first sub-voltage, and the first switched capacitor module is used to step down the first voltage to obtain the first sub-voltage; wherein, the first sub-voltage The voltage is greater than or equal to the second voltage.

In this way, the first switched capacitor module can reduce the voltage difference between the input terminal and the output terminal of the first buck converter by reducing the input voltage of the first buck converter, thereby improving the efficiency of the first buck conversion. The power conversion efficiency of the device. For example, the first switched capacitor module can reduce the battery voltage of 4V to 2V and then provide it to the first buck converter. If the output voltage of the first buck converter is 1.2V, then the voltage across the first buck converter The difference is reduced from 2.8V to 0.8V.

For example, the first sub-voltage may be a voltage value obtained by reducing the voltage of a buck converter. For example, the first sub-voltage may be a fixed voltage value. For example, the first sub-voltage can be 1.1V, 1.2V, 1.8V or other voltages.

For example, the first buck converter may be buck converter 1521.

Exemplarily, the first buck converter may include one or more buck devices. A buck chip may include one or more first buck devices.

For example, the first buck converter may buck the boost converter according to a first buck ratio.

According to the first aspect, or any implementation of the above first aspect, the DC converter includes a boost converter, the first voltage includes a second sub-voltage, and a first switched capacitor module is used to boost the first voltage, A second sub-voltage is obtained; wherein the second sub-voltage is less than or equal to the second voltage.

In this way, the first switched capacitor module can reduce the voltage difference between the input terminal and the output terminal of the first boost converter by increasing the input voltage of the boost converter, thereby increasing the power of the boost converter. conversion efficiency. For example, the first switched capacitor module can increase the battery voltage of 4V to 8V and then provide it to the boost converter. If the output voltage of the boost converter is 9V, the voltage difference across the boost converter is reduced from 5V to 1V. .

For example, the second sub-voltage may be a voltage value boosted by a boost converter, for example, the second sub-voltage may be a fixed voltage value. For example, the second sub-voltage can be 8V, 9V, etc.

By way of example, the boost converter may be boost converter 1522 .

Illustratively, a boost converter may include one or more boost devices. A boost chip may include one or more boost devices.

For example, the boost converter may boost the voltage of the boost converter according to a boost ratio.

According to the first aspect, or any implementation of the first aspect above, the first switched capacitor module includes: a first switch; a second switch, the first connection end of the second switch is connected to the second connection end of the first switch , the second connection end of the second switch is connected to one end of the battery; the third switch, the first connection end of the third switch is connected to the second connection end of the second switch; the fourth switch, the first connection end of the fourth switch The second connection end of the third switch is connected to the second connection end of the fourth switch and the other end of the battery are both connected to the first reference potential end; the fifth switch has the first connection end of the fifth switch and the first connection end of the first switch. The first connection end is connected; the first capacitor, one end of the first capacitor is connected to the second connection end of the first switch, the other end of the first capacitor is connected to the first reference potential end; the second capacitor, one end of the second capacitor is connected respectively It is connected to the second connection end of the fifth switch and the input end of the DC converter, and the other end of the second capacitor is connected to the second reference potential end.

In this way, by controlling the first switch to the fifth switch and the charge energy storage capabilities of the first capacitor and the second capacitor, the battery voltage can be boosted by a boost ratio, or the battery voltage can be stepped down by a first ratio. voltage reduction, thereby achieving the voltage regulation capability of the first switched capacitor module.

For example, the first switch to the fifth switch may be MOS transistors, such as NMOS transistors, PMOS transistors, etc.

For example, the capacitance value of the first capacitor and the capacitance value of the second capacitor may be equal or unequal. The capacitance value of the first capacitor C1 may be 60 μF, and the capacitance value of the second capacitor C2 may be 20 μF.

For example, the first reference potential terminal may be the ground GND1 and the second reference potential terminal may be the ground GND2. The first reference potential terminal and the second reference potential terminal may be the same potential terminal or different potential terminals.

For example, the first switch, the fourth switch and the first capacitor may be located inside the SC chip.

Optionally, when the DC converter is a boost converter, the first switched capacitor module may not include the second capacitor C2.

According to the first aspect, or any implementation of the above first aspect, the power management circuit further includes: a voltage detector, the voltage detector is connected to the battery, and is used to collect the battery voltage of the battery; a controller, the controller is respectively connected to the voltage The detector and the first switched capacitor module are connected to obtain the battery voltage collected by the voltage detector, and when the battery voltage meets the preset voltage adjustment conditions, control the first switched capacitor module to adjust the battery voltage to the first voltage.

In this way, when the voltage meets the preset voltage adjustment conditions, the technical solutions of the embodiments of the present application can be executed, thereby improving the reliability of voltage adjustment.

For example, the voltage detector may be an analog-to-digital converter or other circuit, component or functional module with a voltage acquisition function. For example, an analog-to-digital converter includes a positive-phase input terminal Vin+ and a negative-phase input terminal Vin-. The positive-phase input terminal Vin+ is connected to the positive terminal of the battery, and the negative-phase input terminal Vin- is connected to the negative terminal of the battery.

For example, the controller may be a system chip, a CPU, or other structures and components with control functions. For example, the system chip may include multiple pins for respectively connecting to the SC chip, the control terminal of the fifth switch, and the control terminal of the sixth switch.

For example, the preset voltage adjustment condition may be a condition that needs to be satisfied when the first switched capacitor module can be used to adjust the input voltage of the DC converter.

According to the first aspect, or any implementation of the first aspect above, the power management circuit further includes: a controller configured to control the first switched capacitor module to control the first switched capacitor module when the battery voltage is greater than or equal to the first voltage threshold. One voltage is stepped down to obtain the first sub-voltage.

In this way, when the battery voltage is greater than or equal to the first voltage threshold, the first voltage after being stepped down by the first switched capacitor module can ensure the normal operation of the first buck converter. At this time, the controller can determine the first voltage according to the battery voltage. When the buck converter can operate normally, the first switched capacitor module is controlled to reduce the voltage, thereby ensuring the normal operation of the first buck converter.

For example, the first voltage threshold may be a critical voltage value for whether the first switched capacitor module needs to reduce voltage according to a fixed ratio. Specifically, the first voltage threshold is determined based on the voltage reduction ratio of the first switched capacitor module and the minimum input voltage of the first buck converter.

Exemplarily, the product of the first voltage threshold and the buck ratio is greater than or equal to the minimum input voltage of the first buck converter.

Exemplarily, when the first buck converter includes a plurality of buck devices, and each buck device corresponds to an output voltage, the product of the first voltage threshold and the buck ratio is greater than or equal to that of the plurality of buck devices. The maximum value of the minimum input voltage. Among them, a buck chip may include one or more buck devices.

For example, when the first buck converter includes multiple buck devices, the first voltage threshold may be determined based on the buck ratio of the second switched capacitor circuit 151 and the minimum input voltage of the buck device that is operating.

For example, when the first buck converter includes multiple buck devices, the first voltage threshold may be determined according to the power consumption of the multiple buck connected subloads.

Exemplarily, when the first buck converter includes a plurality of buck devices, the product of the first voltage threshold and the buck ratio is greater than or equal to a minimum value of the minimum input voltages of the plurality of buck devices.

According to the first aspect, or any implementation of the first aspect above, the power management circuit further includes: a controller configured to control the first switched capacitor module to control the third voltage when the battery voltage is less than or equal to the second voltage threshold. One voltage is boosted to obtain a second sub-voltage.

In this way, when the battery voltage is less than or equal to the second voltage threshold, the first voltage boosted by the first switched capacitor module can ensure the normal operation of the boost converter. At this time, the controller can determine the boost converter according to the battery voltage. When it can operate normally, the first switched capacitor module is controlled to boost the voltage, ensuring the normal operation of the boost converter.

For example, the second voltage threshold may be a critical voltage value for whether the first switched capacitor module needs to be boosted according to a fixed ratio. Specifically, the second voltage threshold may be determined based on the boost ratio of the first switched capacitor module and the maximum input voltage of the boost converter.

Illustratively, the product of the second voltage threshold and the boost ratio is less than or equal to the maximum input voltage of boost converter 1522 .

Exemplarily, when the boost converter includes multiple boost devices and each boost device corresponds to an output voltage, the product of the second voltage threshold and the boost ratio is less than or equal to the maximum input of the multiple boost devices. The minimum value in voltage.

For example, when the boost converter includes multiple boost devices, the second voltage threshold may be determined based on the boost ratio of the first switched capacitor module and the maximum input voltage of the working buck device.

For example, when the boost converter 1522 includes multiple boost devices, the second voltage threshold may be determined according to the power consumption of the subloads connected to the multiple boost devices.

Exemplarily, when the boost converter includes multiple boost devices, the product of the second voltage threshold and the boost ratio is less than or equal to the maximum value of the maximum input voltages of the multiple boost devices.

According to the first aspect, or any implementation of the above first aspect, the DC converter includes a first buck converter, the first voltage includes a first sub-voltage, and the power management circuit further includes: a controller, configured to alternately operate according to The switch control logic of the first control stage and the second control switch controls the first switched capacitor module; wherein, in the first control stage, the controller controls the first switch, the third switch, and the fifth switch to conduct, and The second switch and the fourth switch are controlled to be turned off to use the battery to charge the first capacitor and the second capacitor connected in series; in the second control stage, the controller controls the fifth switch to be turned off to output the voltage of the second capacitor. to the input end of the first buck converter; wherein the first sub-voltage is the voltage of the second capacitor.

In this way, the controller can use the battery to charge the first capacitor and the second capacitor by controlling the first switch to the fifth switch to be on and off in the first control stage. In the second control stage, the divided voltage of the second capacitor is provided to the input of the first buck converter. Since the first capacitor and the second capacitor connected in series form a voltage dividing structure, the divided voltage of the second capacitor can be a certain proportion of the battery voltage. Correspondingly, the divided voltage of the second capacitor is used as the first buck converter. When the input voltage is , the battery voltage is reduced proportionally.

For example, the second control stage may be entered after the first capacitor and the second capacitor are charged. And, after the second capacitor is discharged, the first control stage is re-entered.

For example, in the first control stage, the divided voltage of the first capacitor may be VBAT*C1/(C1+C2), and the divided voltage of the second capacitor may be VBAT*C2/(C1+C2). Correspondingly, the first voltage reduction ratio may be C2/(C1+C2).

For example, in the second control stage, the first switch, the fourth switch, and the fifth switch can also be controlled to be turned on and the second switch and the third switch to be turned off, so as to utilize the divided voltage of the first capacitor for the first buck conversion. The device provides the input voltage. At this time, the first voltage reduction ratio may be C1/(C1+C2).

For example, the controller may be connected to the control terminal of the fifth switch through the gate controller to implement on-off control of the fifth switch. In addition, the controller can also send a control signal to the SC chip to realize on-off control of the first switch to the fourth switch through the SC chip.

Optionally, when the capacitance value of the first capacitor is greater than the capacitance value of the second capacitor, you can flexibly choose to use the divided voltage of the first capacitor or the divided voltage of the second capacitor as the first buck converter according to the battery voltage. input voltage. For example, when the battery voltage is relatively high, in the second control stage, the divided voltage of the second capacitor is used to provide the input voltage to the first buck converter. When the battery voltage is low, the divided voltage of the first capacitor is used to provide the input voltage to the first buck converter.

According to the first aspect, or any implementation of the above first aspect, the DC converter includes a boost converter, the first voltage includes a second sub-voltage, and the power management circuit further includes: a controller, configured to alternately operate according to the third The control phase and the switch control logic of the fourth control switch control the first switched capacitor module; wherein, in the third control phase, the controller controls the first switch, the third switch, and the fifth switch to be disconnected, and controls the third switch to be disconnected. The second switch and the fourth switch are turned on to connect the first capacitor and the battery in parallel; in the fourth control stage, the controller controls the first switch, the third switch, and the fifth switch to be turned on, and controls the second switch and the fifth switch to be turned on. The four switches are turned off to connect the first capacitor and the battery in series, and connect one end of the first capacitor to the input end of the boost converter; where the second sub-voltage is the sum of the battery voltage and the voltage of the first capacitor.

In this way, the controller can use the battery to charge the first capacitor in the third control stage by controlling the first switch to the fifth switch to be on and off. In the fourth control stage, after the first capacitor and the battery are connected in series, the voltage of the first capacitor reaches 2 times the battery voltage. At this time, one end of the first capacitor is provided to the input end of the boost converter, and the boost converter can The input voltage of the converter is increased by 2 times, achieving a proportional boost to the battery voltage.

For example, the fourth control stage may be entered after the charging of the first capacitor is completed. And, after the first capacitor is discharged, the third control stage is re-entered.

According to the first aspect, or any implementation of the above first aspect, a sixth switch has one end used to receive a third voltage, and the other end of the sixth switch is connected to the input end of the DC converter.

In this way, through the sixth switch, another input voltage can be provided to the DC converter. When the first voltage cannot be normally provided to the DC converter, the third voltage can be provided to the DC converter by controlling the conduction of the sixth switch, thereby ensuring the normal operation of the DC converter.

For example, the third voltage may be the input voltage of the DC converter in a conventional power supply mode.

For example, the sixth switch may be a MOS transistor.

For example, the control terminal of the sixth switch may be connected to the system chip controller through the gate controller.

According to the first aspect, or any implementation of the above first aspect, the DC converter includes a first buck converter, the first voltage includes a first sub-voltage, and the power management circuit further includes: a controller, configured to operate on the battery When the voltage is less than the first voltage threshold, the sixth switch is controlled to be turned on to output the third voltage to the input end of the first buck converter, so that the first buck converter adjusts the third voltage to the first sub-voltage.

In this way, when the first sub-voltage after being stepped down by the first switched capacitor module cannot guarantee the normal operation of the first step-down converter, for example, when the first sub-voltage is lower than the second voltage, the third voltage can be provided as the first step-down converter. The input voltage of the voltage converter ensures the normal operation of the first buck converter.

Exemplarily, the third voltage is greater than or equal to the minimum input voltage of the first buck converter.

Optionally, when ensuring that the sixth switch is turned on, in order to ensure power reliability, the fifth switch can be controlled to be turned off.

Optionally, when the fifth switch is turned on, in order to ensure power reliability, the sixth switch can be controlled to be turned off.

According to the first aspect, or any implementation of the above first aspect, the DC converter includes a boost converter, the first voltage includes a second sub-voltage, and the power management circuit further includes: a controller, configured to operate when the battery voltage is greater than In the case of the second voltage threshold, the sixth switch is controlled to be turned on to output the third voltage to the input end of the boost converter, so that the boost converter adjusts the third voltage to the second sub-voltage.

In this way, when the second sub-voltage boosted by the first switched capacitor module cannot ensure the normal operation of the boost converter, for example, when the second sub-voltage is higher than the second voltage, the third voltage can be provided as the voltage of the boost converter. input voltage, ensuring the normal operation of the boost converter.

According to the first aspect, or any implementation of the first aspect above, the power management circuit further includes: a controller, configured to obtain the charging voltage of the charging interface; when the charging voltage is greater than or equal to the preset voltage threshold, control The sixth switch is turned on to output the third voltage to the input end of the DC converter, so that the DC converter adjusts the third voltage to the first voltage.

For example, the charging interface may be a USB interface that complies with USB standard specifications, and specifically may be a MiniUSB interface, a Micro USB interface, a USB TypeC interface, etc. For example, the charging interface in the embodiment of the present application may be a TypeC interface.

According to the first aspect, or any implementation of the above first aspect, the third voltage is a battery voltage or a system voltage.

For example, when the third voltage is the battery voltage VBAT, the first connection end of the sixth switch is connected to the battery voltage to obtain the battery voltage VBAT.

For example, when the third voltage is the system voltage VPH, the first connection end of the sixth switch is connected to the battery voltage through the MOS transistor Qbat.

According to the first aspect, or any implementation of the first aspect above, the electronic device further includes a charging interface, a first switched capacitor module is connected to the charging interface, and the first switched capacitor module is also used to obtain a fourth voltage output by the charging interface. , step down the fourth voltage to obtain a fifth voltage; and output the fifth voltage to the battery to charge the battery using the fifth voltage.

In this way, the first switched capacitor module can reuse the original switched capacitor circuit in the fast charging circuit, ensuring the charging function while taking into account the power supply capability. Moreover, the circuit structure is simplified and the cost is reduced.

Optionally, the first switched capacitor module may be additionally provided to ensure the independence of the charging process and the power supply process.

For example, the fourth voltage may be the charging voltage VBUS.

For example, the fifth voltage may be 1/2 of the charging voltage VBUS.

According to the first aspect, or any implementation of the above first aspect, the electronic device further includes a charging interface and a second buck converter, the power management circuit further includes a second switched capacitor module, one end of the second switched capacitor module is connected to The battery is connected. The other end of the second switched capacitor module is connected to one end of the second buck converter. The other end of the second buck converter is connected to the charging interface. The second switched capacitor module is used to obtain the battery voltage and charge the battery. The voltage is boosted to obtain a sixth voltage, and the sixth voltage is output to the charging interface.

In this way, when the battery is reversely charged for external electrical equipment, the power conversion efficiency of the battery can be improved and the battery's endurance can be improved.

For example, the structure and control logic of the second switched capacitor module are similar to those of the first switched capacitor module. Please refer to the relevant description of the first switched capacitor module.

In a second aspect, embodiments of the present application provide a power management method, which is characterized in that the power management circuit applied to the first aspect or any possible implementation of the first aspect includes: a first switched capacitor module to obtain the battery voltage ; The first switched capacitor module adjusts the battery voltage to the first voltage; the DC converter adjusts the first voltage to the second voltage; the DC converter outputs the second voltage to the electrical load to utilize the second voltage to power the electrical load. , wherein the absolute difference between the first voltage and the second voltage is smaller than the absolute difference between the battery voltage and the second voltage.

According to the second aspect, before the first switched capacitor module adjusts the battery voltage to the first voltage, the method further includes: the voltage detector collects the voltage of the battery to obtain the battery voltage; the controller detects the battery voltage when the battery voltage meets the preset voltage adjustment condition. down, controlling the first switched capacitor module to adjust the battery voltage to the first voltage.

According to the second aspect, or any implementation of the above second aspect, the DC converter includes a first buck converter, the first voltage includes a first sub-voltage; the first switched capacitor module includes: first switches connected in series , the second switch, the third switch and the fourth switch, the fifth switch, the first capacitor and the second capacitor; wherein, the first connection end of the fifth switch is connected to the first connection end of the first switch; the first capacitor One end is connected to the second connection end of the first switch, the other end of the first capacitor is connected to the first reference potential end; one end of the second capacitor is respectively connected to the second connection end of the fifth switch and the input of the first buck converter. terminal is connected, and the other terminal of the second capacitor is connected to the second reference potential terminal; the method also includes: the controller alternately controls the first switched capacitor module according to the switching control logic of the first control stage and the second control switch; wherein, In the first control stage, the controller controls the first switch, the third switch, and the fifth switch to turn on, and controls the second switch and the fourth switch to turn off, so as to utilize the battery as the first capacitor and the second capacitor connected in series. Charging; in the second control stage, the controller controls the fifth switch to open to output the voltage of the second capacitor to the input end of the first buck converter.

According to the second aspect, or any implementation of the second aspect above, the DC converter includes a boost converter, the first voltage includes a second sub-voltage: the first switched capacitor module includes: a first switch, a third switch connected in series, The second switch, the third switch and the fourth switch, the fifth switch, the first capacitor and the second capacitor; wherein, the first connection end of the fifth switch is connected to the first connection end of the first switch; one end of the first capacitor is connected to The second connection end of the first switch is connected, and the other end of the first capacitor is connected to the first reference potential end; one end of the second capacitor is connected to the second connection end of the fifth switch and the input end of the boost converter respectively. The other end of the two capacitors is connected to the second reference potential end; the method also includes: the controller alternately controls the first switched capacitor module according to the switching control logic of the third control stage and the fourth control switch; wherein, in the third control stage In the fourth control stage, the controller controls the first switch, the third switch, and the fifth switch to turn off, and controls the second switch and the fourth switch to turn on, so as to use the first capacitor to charge the battery; in the fourth control stage, the controller controls The first switch, the third switch, and the fifth switch are turned on, and the second switch and the fourth switch are controlled to be turned off, so as to connect the first capacitor and the battery in series, and connect one end of the first capacitor to the boost converter. Input connection.

According to the second aspect, or any implementation of the above second aspect, the DC converter includes a first buck converter, the first voltage includes a first sub-voltage, and the controller adjusts the battery voltage when the battery voltage meets the preset voltage adjustment condition. Controlling the first switched capacitor module to adjust the battery voltage to the first voltage includes: when the battery voltage is less than the first voltage threshold, the controller outputs the third voltage to the input end of the first buck converter to The first buck converter is caused to adjust the third voltage to the first sub-voltage.

According to the second aspect, or any implementation of the above second aspect, the DC converter includes a boost converter, the first voltage includes a second sub-voltage, and when the battery voltage is greater than the second voltage threshold, the controller The third voltage is output to the input terminal of the boost converter, so that the boost converter adjusts the third voltage to the second sub-voltage.

The second aspect and any implementation manner of the second aspect respectively correspond to the first aspect and any implementation manner of the first aspect. The technical effects corresponding to the second aspect and any implementation manner of the second aspect may be referred to the technical effects corresponding to the above-mentioned first aspect and any implementation manner of the first aspect, which will not be described again here.

In a third aspect, this application provides an electronic device, including: a battery, a power load, the first aspect, and the power management circuit in any implementation of the first aspect.

The third aspect and any implementation manner of the third aspect respectively correspond to the first aspect and any implementation manner of the first aspect. For the technical effects corresponding to the third aspect and any implementation manner of the third aspect, please refer to the technical effects corresponding to the above-mentioned first aspect and any implementation manner of the first aspect, which will not be described again here.

Description of drawings

1A-1B exemplarily illustrate a schematic diagram of a forward charging scenario of a terminal device;

Figures 2A-2B exemplarily illustrate a schematic diagram of a reverse charging scenario of a terminal device;

Figure 3 shows a schematic diagram of the power supply scenario of a battery of an exemplary terminal device;

Figure 4 shows a schematic structural diagram of an electronic device provided by an embodiment of the present application;

Figure 5 shows a schematic structural diagram of a power processing circuit provided by an embodiment of the present application;

6A-6B show a schematic structural diagram of a switched capacitor circuit provided by an embodiment of the present application;

Figure 7 shows a schematic structural diagram of another power processing circuit provided by an embodiment of the present application;

Figure 8 shows a schematic structural diagram of a terminal device provided by an embodiment of the present application;

Figure 9 shows a schematic structural diagram of a power processing circuit provided by an embodiment of the present application;

Figures 10A-10C show a schematic control logic diagram of a power processing circuit provided by an embodiment of the present application;

11A-11B show a schematic structural diagram of a set of exemplary electrical energy storage modules provided by embodiments of the present application;

Figures 12A-12C show a schematic control logic diagram of another exemplary power processing circuit provided by an embodiment of the present application;

Figure 13 shows a schematic structural diagram of another exemplary power processing circuit provided by an embodiment of the present application;

Figure 14 shows a schematic structural diagram of another exemplary power processing circuit provided by an embodiment of the present application;

Figure 15 shows a schematic structural diagram of a system chip provided by an embodiment of the present application;

Figure 16 shows an exemplary control logic diagram provided by the embodiment of the present application;

Figure 17 shows a schematic structural diagram of another terminal device provided by an embodiment of the present application;

Figure 18 shows a schematic structural diagram of yet another terminal device provided by an embodiment of the present application;

Figure 19 shows a schematic flowchart of an electric energy processing method provided by an embodiment of the present application;

Figure 20 shows a schematic flowchart of another power processing method provided by an embodiment of the present application;

Figure 21 shows a schematic block diagram of a device according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

The term "and/or" in this article is just an association relationship that describes related objects, indicating that three relationships can exist. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and they exist alone. B these three situations.

The terms “first” and “second” in the description and claims of the embodiments of this application are used to distinguish different objects, rather than to describe a specific order of objects. For example, the first target object, the second target object, etc. are used to distinguish different target objects, rather than to describe a specific order of the target objects.

In the embodiments of this application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "such as" in the embodiments of the present application is not to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the words "exemplary" or "such as" is intended to present the concept in a concrete manner.

In the description of the embodiments of this application, unless otherwise specified, the meaning of “plurality” refers to two or more. For example, multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.

In the process of increasing development, terminal devices such as mobile phones and tablet computers have become indispensable items in people's daily lives. Among them, because the battery serves as the power source for various components of the terminal equipment, the battery has become an indispensable and important component of the terminal equipment.

In the daily work of batteries, batteries can provide power to various components of terminal equipment. Alternatively, the terminal device can also charge the device to be charged through its own battery. In addition, the terminal device user can also charge the battery of the terminal device through an external device to supplement the power consumption of the battery during the above process.

For ease of understanding, several application scenarios will be used to describe the specific working scenarios of the battery in the terminal device, taking the terminal device 100 as a mobile phone as an example. Among them, for the convenience of description, the following section refers to the process of charging the terminal device by the external device (that is, charging the battery in the terminal device) as forward charging, and the process of charging the device to be charged by the terminal device (that is, using the battery of the terminal device) as The process of charging the device to be charged) is called reverse charging.

The charging mode of the battery can be divided into normal charging (also called slow charging, low-power charging, etc.) mode and fast charging mode (fast charging mode can include regular fast charging mode and super fast charging mode). For example, in this application, fast charging refers to charging using a charging mode with a charging power greater than 10W, such as 18W, 22.5W, 40W, 66W, 100W, etc.

Exemplarily, FIG. 1A illustrates a schematic diagram of a forward charging scenario of a terminal device. Referring to FIG. 1A , the terminal device 100 may include a charging interface 110 . The charging interface 110 may be a USB interface that complies with the Universal Serial Bus (USB) standard specification. Specifically, it may be a Mini USB interface, a MicroUSB interface, a USB TypeC interface, etc. In the embodiment of the present application, the charging interface 110 The explanation is based on USB Type C as an example.

When wired charging of the terminal device 100 is required, the terminal device 100 and the external power supply 300 can be electrically connected through the wired charger 200A. Among them, the wired charger 200A can be a fast charge charger (that is, a charger that supports Fast Charge Protocol (FCP)) or a super fast charge charger (that is, a charger that supports Super Charger Protocol (SCP)). charger). It should be noted that in normal charging scenarios, the wired charger 200A can also be an ordinary charger (for example, the charging power is 10W).

Specifically, as shown in FIG. 1A , the wired charger 200A may include a data cable 210 and an adapter 220 (if the external power supply 300 is integrated with a connection interface, such as a USB Type A connector, the wired charger 200A may not include an adapter. Head 220). The data line 210 has a first connector 211 and a second connector 212 . The first connector 211 is used to connect to the charging interface 110 of the terminal device 100 , and the second connector 212 is used to connect to the charging interface 221 of the adapter (such as a USB Type A interface) or the connection interface of the external power supply 300 . For example, the first connector 211 may be a USB Type C connector, and the second connector 212 may be a USB Type A connector.

The external power supply 300 may be an external device capable of providing power to the terminal device 100 (ie, charging the terminal device 100). For example, the external power supply 300 can be a power socket (as shown in FIG. 1A ), a computer, a server, a mobile phone with a reverse charging function, etc., and there is no specific limitation on this.

It should be noted that the above example shows a scenario in which the terminal device 100 is charged wiredly using the wired charger 200A. In other examples, the terminal device 200 may also have a wireless charging function, which will be described next with reference to FIG. 1B .

As another example, FIG. 1B illustrates a schematic diagram of a forward charging scenario of another terminal device. Referring to FIG. 1B , when the terminal device 100 needs to be wirelessly charged, the electrical connection between the terminal device 100 and the external power supply 300 can be made through the wireless charger 200B. Among them, the wireless charger 200B is similar to the wired charger 200A. It can be a fast charging charger, a super fast charging charger, or an ordinary charger. For this, please refer to the relevant description of the wired charger 200A in the above part of this application. No longer.

Specifically, as shown in FIG. 1B , the wireless charger 200B may include a data cable 210 , an adapter 220 and a wireless charging head 230 . For the data line 210 and the adapter 220, please refer to the relevant descriptions in the above-mentioned parts of the embodiments of this application, and will not be described again.

For the wireless charging head 230, a wireless charging coil and a magnet (not shown in the figure) are provided. Among them, the wireless charging head 230 can be attracted to the terminal device 100 through magnets. And, after the wireless charging head 230 is adsorbed to the terminal device 100, AC power can be transmitted between the wireless charging coil of the wireless charging head 230 and the wireless charging coil of the terminal device 100, so that the terminal device 100 receives the AC power through its own wireless charging coil. After receiving AC power, it converts the received AC power into DC power to charge the battery.

It should be noted that the terminal device 100 can also be placed on a wireless charging base for charging (without the data cable 210), and there is no specific limitation on this.

After introducing the forward charging scenario of the terminal device 100 through FIGS. 1A and 1B , the possible reverse charging scenarios of the terminal device will be described next.

Exemplarily, FIG. 2A illustrates a schematic diagram of a reverse charging scenario of a terminal device. It should be noted that the embodiment of the present application takes a tablet computer as an example to describe the device 400 to be charged. The device 400 to be charged may also be a mobile phone, a smart watch, etc., and there is no specific limitation on this.

As shown in FIG. 2A , the device 400 to be charged may include a charging interface 410 . In this embodiment of the present application, the charging interface 410 may be a USB TypeC interface. For the charging interface 410, please refer to the relevant description of the charging interface 110 in the above part of the embodiment of this application, which will not be described again here.

The data line 240 may include third connectors 241 and fourth connectors 242 . For example, both the third connector 241 and the fourth connector 242 may be USB TypeC interfaces. As shown in Figure 2A, when the terminal device 100 needs to be used to reversely charge the device 400 to be charged, the third connector 241 is connected to the charging interface 110 of the terminal device 100, and the fourth connector 242 is connected to the charging interface 410 of the device 400 to be charged. , to transfer the electric energy provided by the battery of the terminal device 100 to the battery of the device 400 to be charged.

It should be noted that the above example shows a scenario of wired reverse charging for the device 400 to be charged. In other reverse charging scenarios, the terminal device 200 can also perform wireless reverse charging of the device 400 to be charged. Next, with reference to FIG. 2B explains.

As another example, FIG. 2B illustrates a schematic diagram of a reverse charging scenario of another terminal device. It should be noted that Figure 2B takes the device to be charged as a mobile phone as an example for illustration. However, it should be understood that the device to be charged can also be other devices that support wireless charging functions, such as smart watches, stylus pens, Bluetooth headsets, and tablet computers. , keyboard, etc.

As shown in FIG. 2B , the terminal device 100 can enable the wireless reverse charging function in advance. And, after the wireless charging area of the terminal device 100 is aligned with the wireless charging area of the device to be charged 500, the terminal device 100 can wirelessly charge the device to be charged 500.

It should be noted that, in addition to the forward charging function shown in FIGS. 1A-1B and the reverse charging function shown in FIGS. 2A-2B, the battery of the terminal device also has Provide power supply function to the internal components of the terminal equipment. Next, description will be made with reference to Figure 3.

Exemplarily, FIG. 3 shows a schematic diagram of a power supply scenario of a battery of an exemplary terminal device. As shown in FIG. 3 , the terminal device 100 may include a battery 120 and a power load 130 .

The battery 120 can provide power for electrical loads 130 such as the display screen 131, the camera 132, the speaker 133, the circuit board 13m, etc.

After introducing multiple usage scenarios of the battery through the above content, the hardware structure in the terminal device will be described next with the accompanying drawings.

FIG. 4 shows a schematic structural diagram of an electronic device provided by an embodiment of the present application. It should be understood that the structure of the electronic device shown in FIG. 4 can be applied to the terminal device 100 shown in the above embodiment. It should be understood that the electronic device shown in FIG. 4 is only an example of the electronic device, and the electronic device may have more or fewer components than shown in the figure, and two or more components may be combined. Or could have different component configurations. The various components shown in Figure 4 may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and/or application specific integrated circuits.

Among them, (1) in Figure 4 is a schematic structural view of the front of the electronic device, and (2) in Figure 4 is a schematic structural view of the back of the electronic device. As shown in FIG. 4 , the electronic device includes a display module 10 , a back cover (also called a battery cover) 20 and a middle frame 30 . Among them, the electronic devices provided by the embodiments of the present application may include but are not limited to mobile phones, tablet computers, notebook computers, ultra-mobile personal computers (Ultra-Mobile Personal Computer, UMPC), personal digital assistants (Personal Digital Assistant, PDA), point of sale ( Point of Sales (POS) machines, walkie-talkies, car computers, TVs, smart wearable devices (such as smart watches or smart bracelets, etc.), smart home devices (such as Bluetooth speakers, etc.), driving recorders, security equipment, etc. have charging functions Electronic equipment. The embodiments of this application do not specifically limit the specific types of the above electronic equipment. For convenience of explanation below, the embodiment of the present application will be described by taking the electronic device as a mobile phone as an example.

The display module 10 includes a stacked cover plate and a display screen. The cover protects the display screen, for example. Display screens include, for example, Liquid Crystal Display (LCD), Organic Light Emitting Diode (OLED) displays, and LED displays. The LED display screens include, for example, Micro-LED displays and Mini-LED displays. Screen etc. The embodiment of the present application does not limit the type of display screen.

The material of the back cover 20 may include, for example, opaque materials such as plastic, plain leather, and fiberglass; it may also include light-transmitting materials such as glass. The embodiment of the present application does not limit the material of the back cover 20 .

The middle frame 30 includes a ring-shaped appearance part 31 and a support part (not shown in the figure) located within the ring-shaped appearance part 31 and between the display module 10 and the back cover 20 . A charging interface 70 is also provided on the middle frame. Among them, the charging interface 70 can be an interface that complies with USB standard specifications, and specifically can be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc. In the embodiment of the present application, the charging interface 70 can be used to connect a charger to forward charge electronic devices; can be used to reversely charge electronic devices to other devices to be charged; and can be used to transmit data between electronic devices and peripheral devices. ; Can also be used to connect headphones and play audio through them. This interface can also be used to connect other electronic devices, such as AR devices, etc.

The display module 10, the back cover (also called the battery cover) 20 and the annular appearance part 31 surround the accommodation cavity, and the accommodation cavity is provided with structures such as a battery, a printed circuit board (Printed Circuit Board, PCB) 40, and a functional device 50 ( 2A and 2B), the functional device 50 includes a first functional component and a second functional component. The first functional component can be disposed on the PCB 40 and is electrically connected to the PCB 40; the second functional component is not disposed on the PCB but is electrically connected to the PCB 40. The first functional component may include a processor, a power processing circuit (such as a power management chip and/or a charging management module, etc.), a display driving circuit, a measurement circuit, and other devices, and the second functional component may include a flash, a camera 55 and other devices. Each device is electrically connected through the PCB 40 to realize signal transmission and interaction. The support member can support part of the structure in the accommodation cavity.

The processor may include one or more processing units. For example, the processor may include a baseband processor, an application processor (application processor, AP), a modem processor, a graphics processing unit (GPU), an image processing unit Image signal processor (ISP), controller, memory, video codec, digital signal processor (DSP), and/or neural network processing unit (NPU), etc. . Among them, different processing units can be independent devices or integrated in one or more processors.

A memory can be provided in the processor to store instructions and data. In some embodiments, the memory in the processor is cache memory. This memory can hold instructions or data that have just been used by the processor or are used repeatedly. If the processor needs to use the instruction or data again, it can be called directly from the memory. It avoids repeated access and reduces the waiting time of the processor, thus improving the efficiency of the system.

In some embodiments, a processor may include one or more interfaces. Interfaces may include integrated circuit (Inter-Integrated Circuit, I2C) interface, serial peripheral interface (Serial Peripheral Interface, SPI), integrated circuit built-in audio (Inter-Integrated Circuit Sound, I2S) interface, pulse code modulation (Pulse Code Modulation, PCM) interface, Universal Asynchronous Receiver/Transmitter (UART) interface, Mobile Industry Processor Interface (MIPI), General-Purpose Input/Output (GPIO) interface, user identification module (Subscriber Identity Module, SIM) interface, and/or Universal Serial Bus (Universal Serial Bus, USB) interface, etc.

The I2C interface is a bidirectional synchronous serial bus, including a serial data line (SDA) and a serial clock line (derail clock line, SCL). In some embodiments, a processor may contain multiple sets of I2C buses. The processor can separately couple the flash, camera 55, etc. through different I2C bus interfaces. In the embodiment of the present application, the processor can be coupled to the measurement circuit through the I2C interface, so that the processor and the measurement circuit communicate through the I2C bus interface to implement the detection function of the electronic device.

The charging management module is used to receive charging input from the charger. Among them, the charger can be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module may receive charging input from the wired charger through the charging interface 70 . In some wireless charging embodiments, the charging management module may receive wireless charging input through a wireless charging coil of the electronic device. While the charging management module charges the battery, it can also provide power to the electrical load of the electronic device through the power management module.

The power management module is used to connect the battery, charging management module and processor. The power management module receives input from the battery and supplies power to electrical loads such as the PCB board 40, processor, internal memory, external memory, display screen, camera 55, and wireless communication module 660.

It can be understood that the above content only schematically illustrates some components included in the electronic device (terminal device). The actual electronic device may have more or less components than the above content, or some components may be combined, or Splitting certain parts, or different parts arrangements. The components illustrated may be implemented in hardware, software, or a combination of software and hardware.

It should be noted that the electronic device in Figure 4 is in the shape of a rectangular flat plate. In other optional embodiments, the shape of the electronic device may also be a square flat plate, a circular flat plate, an elliptical flat plate, etc. Of course, the electronic device may also be a foldable electronic device or the like.

After introducing the structure of the terminal equipment through Figure 4, since the external power supply charges the battery of the terminal equipment and the battery of the terminal equipment supplies power to other electrical loads, it must be realized through the power processing circuit. Next, the power in the terminal equipment Processing circuit is explained.

Exemplarily, FIG. 5 shows a schematic structural diagram of a power processing circuit provided by an embodiment of the present application. As shown in FIG. 5 , the terminal device 100 may include a charging interface 110 (which may be referred to as the charging interface 70 in FIG. 4 ), a charging control switch S0 , a battery 120 , a power load 130 , and a power processing circuit 140 . The power processing circuit may include a first switched capacitor (Switch Capacitor Converter, SC) circuit 141 (which may be part of the charging management module) and a Direct Current (Direct Current-Direct Current, DCDC) converter 142 (which may be part of the power management module). part of the module).

The first switched capacitor circuit 141 may also be called a charge pump (Charge Pump), which may be a partial circuit of the SC chip. As shown in Figure 5, one end of the first switched capacitor circuit 141 is connected to the charging interface 110 through the charging control switch S0 (wherein, the charging control switch S0 includes a first connection end, a second connection end and a control end (not shown in the figure) , one end of the first switched capacitor circuit 141 is connected to the second connection end of the charging control switch S0, the first connection end of the charging control switch S0 is connected to the charging interface 110, and the control end of the charging control switch S0 is connected to the controller), The other end of the first switched capacitor circuit 141 is connected to one end of the battery 120 (the positive electrode of the battery 120). The other end of the battery 120 (the negative electrode of the battery 120) is connected to the first reference potential terminal (such as the ground GND1 in Figure 5). Specifically, the first switched capacitor circuit 141 may include a capacitor and a switch. Among them, the capacitor serves as the energy storage element of the first switched capacitor circuit 141. By controlling the on and off of the switch to charge and discharge the capacitor, the first switched capacitor circuit 141 can convert the charging voltage VBUS input from the charging interface 110 into The battery voltage VBAT is used to charge the battery 120 . Among them, in the embodiment of the present application, the battery voltage VBAT may be in the range of 3V (volt) ~ 4.5V.

Exemplarily, FIG. 6A shows a schematic structural diagram of a first switched capacitor circuit provided by an embodiment of the present application. As shown in FIG. 6A , the first switched capacitor circuit 141 includes a first capacitor C1 (flying capacitor), and a first switch S1 , a second switch S2 , a third switch S3 , and a fourth switch S4 (i.e., the first switch S4 ) connected in series. Switch S1-fourth switch S4). Among them, the first switch S1 to the fourth switch S4 and the above-mentioned charge control switch S0 may be metal-oxide semiconductor field-effect transistors (Metal Oxide Semiconductor, MOS), or. In the embodiment of the present application, each MOS transistor may include a control end, a first connection end and a second connection end. The control end may refer to the gate of the MOS transistor, and the first connection end may refer to the gate of the MOS transistor. The source (Source) of the MOS tube, its second connection terminal can be the drain (Drain) of the MOS tube, or the first connection terminal can refer to the drain of the MOS tube, and the second connection terminal can refer to the MOS tube. The source of the tube. It should be noted that the first switch S1 to the fourth switch S4 can also be implemented as other electronic devices with switching functions, and there is no limitation on this. Moreover, the first capacitor C1 may be one capacitor device or multiple capacitor devices connected in parallel, and there is no limitation on this.

Wherein, the first connection end of the first switch S1 is connected to the second connection end of the charging control switch S0, the second connection end of the first switch S1 is connected to the first connection end of the second switch S2, and the second connection end of the second switch S2 is connected to the first connection end of the first switch S1. The second connection end is connected to the first connection end of the third switch S3, the second connection end of the third switch S3 is connected to the first connection end of the fourth switch S4, and the second connection end of the fourth switch S4 is connected to the first reference potential. terminal (such as ground GND1 in Figure 6A). And, in the case where the first switched capacitor circuit 141 is a circuit in an SC chip, and the SC chip also includes a switched capacitor controller, the switched capacitor controller can control the first to fourth switches S1 to S1 in the first switched capacitor circuit 141 Switch S4 is used for control. Optionally, in the case where the SC chip also includes a charge control switch S0, the switched capacitor controller can also control the charge control switch S0. Specifically, the control terminals of the charge control switch S0 and the control terminals of the first switch S1 to the fourth switch S4 can be connected to the switched capacitor controller, so that they can be turned on or off under the control of the switched capacitor controller.

One end of the first capacitor C1 is connected between the first switch S1 and the second switch S2, that is, one end of the first capacitor C1 is connected to the second connection end of the first switch S1, or it can also be said that the first end of the first capacitor C1 One end is connected to the first end of the second switch S2. The other end of the first capacitor C1 is connected between the third switch S3 and the fourth switch S4. It can also be said that the other end of the first capacitor C1 is connected to the second connection end of the third switch S3. It can also be said that the second connection end of the first capacitor C1 is connected to the second connection end of the third switch S3. The other end of a capacitor C1 is connected to the first end of the fourth switch S4.

And, one end of the battery 120 is connected between the second switch S2 and the third switch S3, that is, one end of the battery 120 is connected to the second connection end of the second switch S2, or it can also be said that one end of the battery 120 is connected to the third switch S3. The first connection of S3 is connected. The other end of the battery 120 is connected to the second connection end of the fourth switch S4, that is, the other end of the battery 120 is connected to the first reference potential end.

In a fast charging scenario, taking 2:1 step-down conversion as an example, Figure 6B shows the step-down process of the first switched capacitor circuit. The first switched capacitor circuit 141 can be divided into two power transmission stages. Next, Explain one by one.

The first power transmission stage is the stage when the external power supply charges the first capacitor C1. Specifically, as shown in (1) in FIG. 6B , the first switch S1 and the third switch S3 are turned on, and the second switch S2 and the fourth switch S4 are turned off. At this time, the first capacitor C1 and the battery 120 are connected in series, and the current It can be transmitted along the current transmission path ① shown by the dotted line. During the current transmission process, the charging voltage VBUS provided by the external power source charges the first capacitor C1 and the battery 120. The potential difference between the two ends of the first capacitor C1 gradually increases. At the first After capacitor C1 is charged, it can enter the second power transmission stage.

The second power transmission stage is the stage where the first capacitor is the battery 120 for fast charging. Specifically, as shown in (2) in FIG. 6B , the first switch S1 and the third switch S3 are turned off, and the second switch S2 and the fourth switch S4 are turned on. At this time, the first capacitor C1 and the battery 120 are connected in parallel. A capacitor C1 can charge the battery 120 along the current transmission path ② shown by the dotted line. After the first capacitor C1 is discharged in this round, it re-enters the first power transmission stage, and this is repeated until the battery 120 is fully charged.

It should be noted that 1:1 voltage reduction can also be achieved through the first switched capacitor circuit 141 according to actual needs. Specifically, the first switch S1 and the second switch S2 can be controlled to be turned on, and the third switch S3 and the fourth switch S4 can be controlled to be turned off, so as to directly charge the battery 120 using the charging voltage VBUS.

After introducing the first switched capacitor circuit 141, the description of the direct current (DCDC) converter 142 continues.

The DC converter 142 can be an inductive converter (that is, a converter using an inductor as an energy storage element), such as a buck converter, a boost converter, a boost-buck converter, BOOST -BUCK) converter, etc. It should be noted that in the embodiment of the present application, when the power supply voltage of the load connected to the boost-buck converter is low, such as 1.1V, 1.2V, etc., it can be determined that the boost-buck converter needs to step down. voltage function, it can be considered as a buck converter at this time. For another example, when the power supply voltage of the load connected to the boost-buck converter is relatively high, such as 8V, 9V, etc., it can be determined that the boost-buck converter needs to perform a buck function. At this time, it can be regarded as a step-up. voltage converter.

Specifically, continuing to refer to FIG. 5 , the voltage input end of the DC converter 142 has two optional connection methods: In the first connection method, the voltage input end of the DC converter 142 is connected to the battery 120 through the first voltage reduction circuit 143 One end is connected, that is, the voltage input end of the DC converter 142 is connected to one end of the first buck circuit 143, and the other end of the first buck circuit 143 is connected to one end of the battery 120. In this connection method, the DC converter The input voltage of 142 is the system voltage VPH. It should be noted that the first buck circuit 143 is a buck converter in a bypass state, and the first buck circuit 143 in the bypass state is equivalent to the MOS transistor Qbat. In the second connection mode, the voltage input end of the DC converter 142 is connected to one end of the battery 120. In this connection mode, the input voltage of the DC converter is the battery voltage VBAT. The voltage output end of the DC converter 142 is connected to the electrical load 130 .

Specifically, the DC converter 142 can convert the input voltage (system voltage VPH or battery voltage VBAT) into an output voltage with a fixed voltage value, and provide the output voltage to the electrical load 130 to realize power supply to the electrical load 130 . In one embodiment, since some devices in the terminal equipment (hereinafter referred to as the first power load) require supply voltages such as 1.1V, 1.2V, 1.8V, etc., and the battery voltage VBAT is generally in the range of 3~4,5V, correspondingly Ground, the DC converter 142 may include a buck converter, and the buck converter may step down the input voltage to obtain an output voltage of a fixed voltage value, such as 1.1V, 1.2V, 1.8V, etc., to provide the first Powered by electrical loads. In another implementation, because electronic devices (hereinafter referred to as the second electrical load) in the terminal equipment such as speakers, audio power amplifiers (Power Amplifier, PA), radio frequency PA, and display screens (such as light-emitting elements in the display screen) may A supply voltage of 8~9V is required. Accordingly, the DC converter 142 may include a boost converter. The boost converter may boost the input voltage to obtain an output voltage of a fixed voltage value (such as 8V, 9V, etc.) to provide The second electrical load is powered. It should be noted that in the embodiment of the present application, the buck converter and the boost converter can also output voltages of other values according to the actual power consumption scenario and specific power demand of the power load of the terminal equipment, which will not be specified. limit.

In other embodiments, the battery 120 can also charge external devices to be charged. Specifically, FIG. 7 shows a schematic structural diagram of another power processing circuit provided by an embodiment of the present application. The difference between FIG. 7 and FIG. 5 is that the power processing circuit 140 may also include a buck converter 144 . One end of the buck converter 144 is connected to the charging interface 110 , and the other end of the buck converter 144 is connected to one end of the battery 120 . When the battery 120 supplies power to the device to be charged, the current provided by the battery 120 can be transmitted along the current transmission path shown by the dotted arrow. At this time, the buck converter 144 is equivalent to a boost converter, and the buck converter 144 supplies power to the battery. After the voltage provided by 120 is boosted, the boosted supply voltage is transmitted to the device to be charged through the charging interface 110 .

However, the inventor's research found that the power conversion efficiency of buck converters and boost converters is often low, for example, it may be only about 80%, which affects the battery life of terminal equipment. Moreover, the inventor also found that for DC converters such as buck converters and boost converters, the greater the voltage difference between the input voltage and the output voltage, the lower the power conversion efficiency.

Based on this, the inventor provides an electric energy processing solution. A switched capacitor circuit is provided at the front end of a DC converter such as a buck converter or a boost converter, and the buck voltage is reduced through the boost and buck capabilities of the switched capacitor circuit. The voltage difference between the two ends of DC converters such as converters and boost converters improves the power conversion efficiency of DC converters such as buck converters and boost converters, and improves the battery life of terminal equipment.

Next, the following part of the embodiment of the present application will describe the electric energy processing solution provided by the embodiment of the present application in conjunction with the accompanying drawings.

The embodiment of the present application provides a power processing circuit, which will be described next with reference to Figures 8-16.

Figure 8 shows a schematic structural diagram of a terminal device provided by an embodiment of the present application. As shown in Figure 8, the terminal device 100 may include a charging interface 110, a battery 120, a power load 130, a power processing circuit 150, an analog to digital converter (ADC) 160, a system on chip (SOC) )170. Furthermore, each of the above-mentioned devices can be disposed on the circuit board of the terminal device, such as the main board or the sub-board, and there is no restriction on this. For other contents of the charging interface 110, the battery 120, and the electrical load 130, please refer to the relevant descriptions in the above-mentioned parts of the embodiment of the present application, and will not be repeated here. The following part of the embodiment of the present application will describe the power processing circuit 150, analog digital The converter 160 and the system chip 170 will be described one by one.

The power processing circuit 150 may include a charge control switch S0, a second switched capacitor circuit 151, a fifth switch S5, a sixth switch S6, a second capacitor C2 and a direct current (DCDC) converter 152.

The second switched capacitor circuit 151 has one end connected to the charging interface 110 through the charging control switch S0, and one end of the second switched capacitor circuit 151 is also connected to the DC converter 152 through the fifth switch S5. And, the other end of the second switched capacitor circuit 151 is connected to one end of the battery 120 . Exemplarily, FIG. 9 illustrates a schematic structural diagram of a power processing circuit provided by an embodiment of the present application. As shown in FIG. 9 , the second switched capacitor circuit 151 may include a first switch S1 - a fourth switch S4 and a first capacitor C1. Among them, in terms of connection relationship, the second switched capacitor circuit 151 is similar to the above-mentioned first switched capacitor circuit 141. The difference from the first switched capacitor circuit 141 is that the third switch S1 of the second switched capacitor circuit 151 One connection end (that is, one end of the second switched capacitor circuit 151) is also connected to the first connection end of the fifth switch S5. It should be noted that in this embodiment of the present application, the number of switched capacitor circuits in the second switched capacitor circuit 151 can be 1, 2 or 3, which can be set according to the actual needs of the terminal equipment, and no specific details are given about this. limit. And, when the external power supply charges the terminal device through the charging interface 110, the second switched capacitor circuit 151 can obtain the charging voltage VBUS through the charging interface 110, and according to the preset voltage reduction ratio (referred to as the second voltage reduction ratio for short, such as 1/ 2) After performing the voltage reduction process, the reduced voltage is used for fast charging of the battery 120 . Through this embodiment, by multiplexing the second switched capacitor circuit 151, there is no need to set up a separate switched capacitor circuit. The original second switched capacitor circuit 151 in the charging circuit can be used to realize the technical solution provided by the embodiment of the present application, reducing the cost Structural cost and optimized circuit structure.

The fifth switch S5 includes a first connection terminal, a second connection terminal and a control terminal. Its first connection end is connected to one end of the second switched capacitor circuit 151 and the second connection end of the charging control switch S0 respectively. Its second connection end is connected to the DC converter 152 and one end of the second capacitor C2 respectively. Its control end Can be connected to system chip 170. It should be noted that the control end of the fifth switch S5 can also be connected to other control modules with control functions, and there is no restriction on this. For example, the fifth switch S5 can be implemented as a MOS transistor, or other device or functional unit with switching function, and there is no limitation on this.

The sixth switch S6 may include a first connection terminal, a second connection terminal and a control terminal. The first connection end of the sixth switch S6 is used to obtain the system voltage VPH or the battery voltage VBAT. Specifically, the first connection end of the sixth switch S6 can be connected to one end of the battery 120 to obtain the battery voltage VBAT, or can be through a MOS The tube Qbat (the first buck (BUCK) circuit 143 in the bypass state) is connected to one end of the battery 120 to obtain the system voltage VPH. The second connection end of the sixth switch S6 is connected to the DC converter 152 . And, the control end of the sixth switch S6 may be connected to the system chip 170 . It should be noted that the control end of the sixth switch S6 can also be connected to other control modules with control functions, without limitation, and the control end of the fifth switch S5 and the control end of the sixth switch S6 can be connected to the same control module. modules or different control modules, there are no restrictions on this.

The second capacitor C2 is used for charge storage. Its first connection end can be connected to the other end of the fifth switch S5 and one end of the DC converter 152 respectively, and its other end is connected to the second reference potential end (such as in Figure 8 ground GND2). It should be noted that the first reference potential end and the second reference potential end may be the same potential end or different potential ends, and there is no specific limitation on this. And, it should also be noted that any one of the first capacitor C1 and the second capacitor C2 may include one capacitor element, or be composed of multiple capacitor elements connected in parallel, series or mixed connection. There is no specific limit to this.

The DC converter 152 may be an inductive DC converter, that is, a converter using an inductor as an energy storage unit. For example, the DC converter 152 may include one or more of a buck converter, a boost converter, and a boost-buck converter. For example, the buck converter can be implemented as a buck chip, the boost converter can be implemented as a boost chip, the boost-buck converter can be implemented as a boost-buck chip, or it can also be implemented as anything other than There are no restrictions on other structures other than chips.

In some embodiments, when the DC converter 152 includes a buck converter 1521 and the input voltage of the buck converter 1521 is relatively high, the power processing circuit can provide the input voltage to the buck converter 1521 through two control stages. Each of these will be explained below.

The first control stage D1 is the charging process of the capacitor by the battery 120 . FIG. 10A shows a schematic control logic diagram of an exemplary power processing circuit provided by an embodiment of the present application. As shown in (1) in Figure 10A, at this stage, the first switch S1, the third switch S3, and the fifth switch S5 can be controlled to be turned on, and the second switch S2 and the fourth switch S4 can be controlled to be turned off. At this time The current is transmitted along the current transmission path shown by the dotted arrow in (1) in Figure 10A. At this time, the equivalent circuit is shown in (2) in Figure 10A. The battery 120 is the first capacitor C1 and the second capacitor C2. When charging, the first capacitor C1 and the second capacitor C2 connected in series form a voltage dividing structure. As charging proceeds, the voltage difference across the first capacitor C1 and the second capacitor C2 gradually increases until the voltage difference across the first capacitor C1 After the voltage U1 reaches VBAT*C1/(C1+C2) and the voltage U2 across the second capacitor C2 reaches VBAT*C2/(C1+C2), charging is completed and the second control stage D2 can be entered.

In the second control stage D2, the capacitor provides the input voltage to the buck converter 1521. FIG. 10B shows a schematic control logic diagram of another exemplary power processing circuit provided by an embodiment of the present application. As shown in (3) in Figure 10B, at this stage, the fifth switch S5 can be controlled to be turned off. At this time, the equivalent circuit is as shown in (4) in Figure 10B, and the second capacitor C2 is a buck converter. 1521 provides the input voltage VBAT*C2/(C1+C2), where C2/(C1+C2) can be used as the voltage reduction ratio of the switched capacitor circuit 151 (referred to as the first voltage reduction ratio). After this round of discharging ends, the first control stage D1 can be re-entered, and the battery 120 charges the second capacitor C2. Wherein, regarding the capacitance values of the first capacitor C1 and the second capacitor C2, the ratio of the two capacitance values may be determined by the voltage step-down ratio of the switched capacitor circuit. For example, if the switched capacitor circuit is a 2:1 voltage reduction (that is, the voltage reduction ratio is 1/2), that is, the output voltage is reduced to one-half of the input voltage, then the capacitance values of the first capacitor C1 and the second capacitor C2 can be same. For another example, if the switched capacitor circuit is a 4:1 voltage reduction (that is, the voltage reduction ratio is 1/4), that is, the output voltage is reduced to a quarter of the input voltage, the capacitance value of the second capacitor C2 is the first capacitance value C1 one third of the capacitance value. For example, if the capacitance value of the first capacitor C1 is 60 μF (microfarad), the capacitance value of the second capacitor C2 may be 20 μF.

It should be noted that in the second control stage D2, the first capacitor C1 can also be used to provide the input voltage to the buck converter 1521. At this time, a control switch can be set at one end of the second capacitor C2. In the second control stage D2, the first switch S1, the fourth switch S4, and the fifth switch S5 can be controlled to be turned on, and the second switch S2 and the third switch S5 can be controlled to be turned on. S3 is disconnected from the control switch to use the divided voltage VBAT*C1/(C1+C2) of the first capacitor C1 to provide the input voltage to the buck converter 1521, where C1/(C1+C2) can be used as the switched capacitor circuit 151 The pressure reduction ratio. Optionally, the divided voltage of the first capacitor C1 or the divided voltage of the second capacitor C2 can be flexibly selected to provide the input voltage to the buck converter 1521 according to the level of the battery voltage VBAT. For example, if the divided voltage of C1 is 3/4 of the battery voltage VBAT, the divided voltage of C2 is 1/4 of the battery voltage VBAT, and the voltage of the buck converter 1521 is 1.1V, then it can be used when the battery voltage VBAT is greater than or equal to 4.4 When V, the divided voltage of C2 is used to provide the input voltage to the buck converter 1521. At this time, when the battery voltage is large, C2 can be used to reduce the battery voltage VBAT by 4 times, so that the voltages at the input and output ends of the buck converter 1521 are both close to 1.1, and the voltage difference across the buck converter 1521 is reduced. . And, when the battery voltage VBAT is less than 4.4V and greater than or equal to 1.467V, C1 can be used to reduce the battery voltage VBAT by 4/3 times, which ensures the operation of the buck converter 1521 and at the same time reduces the voltage at both ends of the buck converter 1521. pressure difference.

Exemplarily, FIG. 10C shows a logical schematic diagram of an electric energy processing solution provided by an embodiment of the present application. As shown in (1) in FIG. 10C , when the battery voltage VBAT of 4V is directly input to the buck converter 1521 (that is, the input voltage of the buck converter 1521 is 4V), the buck converter 1521 needs to reduce the voltage from 4V. to 1.2V, and then use the 1.2V output voltage to power the electrical load. In this case, the voltage difference ΔV11 across the buck converter 1521 (i.e., the difference between the input voltage and the output voltage) reaches 2.8V (i.e., 4V-1.2V=2.8V). At this time, the voltage difference between the two ends of the buck converter 1521 The voltage difference between the terminals is large and the power transmission efficiency is low.

And, through the above-mentioned first control stage D1 to the second control stage D2, when the capacitance values of the first capacitor C1 and the second capacitor C2 are the same (that is, the second switched capacitor circuit 151 is a 2:1 step-down), as As shown in (2) in Figure 10C, the second switched capacitor circuit 151 can reduce the voltage from 4V to 2V, and then apply the 2V voltage to the input end of the buck converter 1521. At this time, the voltage across the buck converter 1521 The voltage difference △V12 reaches 0.8V (i.e. 2V-1.2V=0.8V). Compared with the voltage difference △V11, the voltage difference between the two ends of the buck converter 1521 is greatly reduced, that is, it is reduced from 2.8V to 0.8V, which increases The power conversion efficiency of the buck converter 1521 thereby improves the battery life of the terminal device.

In one embodiment, since the electrical loads in the terminal equipment may require different supply voltages, such as 1.1V, 1.2V, 1.8V, etc., accordingly, different voltages can be output through different voltage-reducing devices. Exemplarily, FIG. 11A shows a schematic structural diagram of an exemplary electric energy storage module provided by an embodiment of the present application. As shown in FIG. 11A , the buck converter 1521 may include a first buck device (BUCK) 1521A, a second buck device (BUCK) 1521B, and a third buck device (BUCK) 1521C. Each of the first buck device 1521A, the second buck device 1521B and the third buck device 1521C may be a buck chip, or multiple buck devices may be integrated into one buck chip. There are no restrictions on this. And, the first electrical load 131 connected to the output end of the buck converter 1521 may include a first sub-load 131A, a second sub-load 131B and a third sub-load 131C, wherein the supply voltage of the first sub-load 131A is 1.1V, the power supply voltage of the second subload 131B is 1.2V, and the power supply voltage of the third subload 131C is 1.8V.

After the first voltage reducing device 1521A obtains the input voltage through the input terminal, it can reduce the voltage to obtain an output voltage of 1.1V, and provide the output voltage of 1.1V to the first subload 131A through the output terminal. After the second voltage reducing device 1521B obtains the input voltage through the input terminal, it can reduce the voltage to obtain an output voltage of 1.2V, and provide the output voltage of 1.2V to the second subload 131B through the output terminal. After the third voltage reducing device 1521C obtains the input voltage through the input terminal, it can reduce the voltage to obtain an output voltage of 1.8V, and provide the output voltage of 1.8V to the third subload 131C through the output terminal.

Optionally, when the buck converter 1521 includes multiple buck devices, the voltage division of the first capacitor C1 or the voltage division of the second capacitor C2 can be flexibly selected to provide input voltages for different buck devices. For example, if the divided voltage of the first capacitor C1 is 3/4 of the battery voltage VBAT, the divided voltage of the second capacitor C2 is 1/4 of the battery voltage VBAT, and the battery voltage is 4.5V, then the divided voltage of the first capacitor C1 can be used. The voltage is used to provide an input voltage to the second buck device 1521B and the third buck device 1521C, and the divided voltage of the first capacitor C2 is used to provide an input voltage to the first buck device 1521A.

Optionally, in the case where the buck converter 1521 includes multiple buck devices, the second capacitance C2 may be determined according to the power consumption capabilities of the subloads connected to the multiple buck devices. For example, if the second subload 131B connected to the second voltage reducing device 1521B has the largest power consumption, the capacitance value of the second capacitor C2 can be determined according to the second voltage reducing device 1521B, so that after the voltage division of the second capacitor C2 The voltage can make the second buck device 1521B work normally, so that the battery 120 can have a higher power conversion rate when powering a subload that consumes a large amount of power, thus improving the power utilization of the battery 120 as a whole. Improved battery life of terminal devices.

In another embodiment, different buck devices may use different capacitors to power them. FIG. 11B shows a schematic structural diagram of an exemplary electric energy storage module provided by an embodiment of the present application. As shown in Figure 11B, the difference from Figure 11A is that each buck device can be connected to the fifth switch S5 through a switch. For example, the first buck device 1521A is connected to the fifth switch S5 through the seventh switch S7. The second voltage reducing device 1521B is connected to the fifth switch S5 through the eighth switch S8, and the third voltage reducing device 1521C is connected to the fifth switch S5 through the ninth switch S9.

And, the second capacitor C2 can be a first capacitor element C21, a second capacitor element C22 and a third capacitor element C23, wherein each capacitor element can correspond to a buck device, and each capacitor element can be connected to the first capacitor element through a switch. Five switch connections. For example, the first capacitive element C21 can correspond to the first buck device 1521A, and the first capacitive element C21 is connected to the fifth switch S5 through the tenth switch S10; the second capacitive element C22 can correspond to the second buck device 1521B, and the second capacitor C21 can correspond to the second buck device 1521B. The element C22 is connected to the fifth switch S5 through the eleventh switch S10; the third capacitive element C23 can correspond to the third buck device 1521C, and the third capacitive element C23 is connected to the fifth switch S5 through the twelfth switch S12.

When it is necessary to supply power to a subload connected to any voltage-reducing device, the switch connected to the voltage-reducing device can be controlled to be conductive, and the switch connected to the capacitive element corresponding to the voltage-reducing device can be controlled to be conductive. For example, if it is necessary to supply power to the first subload 131A, in the first control stage D1, the tenth switch S10 can also be controlled to be turned on, so that the battery 120 can charge the first capacitor C1 and the first capacitive element C21. And, in the second control stage D2, the tenth switch S10 and the seventh switch S7 can also be controlled to be turned on to use the divided voltage of the first capacitor C21 to provide the input voltage to the first buck device 1521A. Through this method, different input voltages can be provided for different buck devices, so that the power transmission efficiency of each buck device can be accurately adjusted, further improving battery life.

Optionally, different capacitive elements in the capacitor C2 can also be used to provide different input voltages for different buck devices. For example, the third capacitive element C23 is used to provide the input voltage for the third buck device 1521C, and the third capacitive element C23 The parallel structure with the second capacitive element C22 provides the input voltage to the second buck device 1521B. It should be noted that the embodiments of the present application can adopt different solutions, so that different voltage-reducing devices can provide input voltages from capacitor devices with different capacitance values, and the specific implementation methods are not limited.

In other embodiments, when the DC converter 152 includes a boost (BOOST) converter 1522 and the input voltage of the boost converter 1522 is low, the power processing circuit can pass two control stages to convert the buck converter 1521 The input voltage is provided and will be explained one by one next.

In the third control stage D3, the battery 120 is in the charging process of the first capacitor C1. FIG. 12A shows a schematic control logic diagram of another exemplary power processing circuit provided by an embodiment of the present application. As shown in (1) in Figure 12A, at this stage, the second switch S2 and the fourth switch S4 can be controlled to be turned on, and the first switch S1, the third switch S3, and the fifth switch S5 are turned off. At this time, this When the current is transmitted along the current transmission path shown by the dotted arrow in (1) in Figure 12A, the equivalent circuit can be as shown in (2) in 12A. The battery 120 charges the first capacitor C1, and the first capacitor C1 The voltage difference between the two ends gradually increases. After the voltage U1 across the first capacitor C1 reaches VBAT, charging is completed and the fourth control stage D4 can be entered.

In the fourth control stage D4, the battery 120 and the first capacitor C1 provide the input voltage to the boost converter 1522. As shown in (1) in Figure 12B, at this stage, the first switch S1, the third switch S3 and the fifth switch S5 can be controlled to be turned on, and the second switch S2 and the fourth switch S4 are turned off. At this time, the current flows along the The current transmission path is transmitted along the current transmission path shown by the dotted arrow in (1) in Figure 12B. At this time, the equivalent circuit is shown in (2) in Figure 12B. The battery 120 and the first capacitor C1 are connected in series to form the boost converter 1522. An input voltage is provided. At this time, the input voltage of the boost converter 1522 may be 2*VBAT. Correspondingly, the boost ratio of the second switched capacitor circuit 151 is 2. After the current round of discharging ends, the third control phase C3 can be re-entered. The battery 120 recharges the first capacitor C1 and then re-enters the fourth control phase D4. In addition, it should be noted that the second capacitor C2 can perform filtering in the power transmission circuit corresponding to the boost converter 1522 to improve the signal quality of the input voltage. Optionally, in order to reduce circuit cost, the power transmission circuit corresponding to the boost converter 1522 may not include the second capacitor C2.

Exemplarily, FIG. 12C shows a logical schematic diagram of another power processing solution provided by an embodiment of the present application. As shown in (1) in FIG. 12C , when the battery voltage VBAT of 4V is directly input to the boost converter 1522 (that is, the input voltage of the boost converter 1522 is 4V), the boost converter 1522 increases the voltage from 4V. to 9V, and then use the 9V output voltage to power the electrical load. In this case, the voltage difference ΔV21 across the boost converter 1522 reaches 5V (ie, 9V-4V=5V). At this time, the voltage difference across the boost converter 1522 is large and the power transmission efficiency is low.

Moreover, in the embodiment of the present application, through the above-mentioned third control stage D3 and fourth control stage D4, when a switched capacitor (SC) circuit is provided at the front end of the boost converter 1522, the switched capacitor circuit can boost the 4V voltage. up to 8V, and then apply the 8V voltage to the input end of the boost converter 1522. At this time, the voltage difference ΔV22 across the boost converter 1522 reaches 1V (i.e. 9V-8V=1V). Compared with the voltage difference △V21, the voltage difference between the two ends of the boost circuit is reduced from 5V to 1V, which improves the power conversion efficiency of the boost converter 1522, thus improving the battery life of the terminal device.

For example, the boost converter 1522 may include multiple boost devices to provide different supply voltages to the second electrical load 132 . Its specific structure is similar to the circuit structure of a buck converter 1521 including multiple buck devices shown above in conjunction with FIGS. 11A and 11B. Please refer to the relevant descriptions of the above parts of the embodiments of this application, and will not be repeated again.

In some embodiments, when the battery voltage VBAT is 3~3.5V, some electrical loads (hereinafter referred to as the first electrical load 131) need to use a supply voltage of 1.1V~1.8V (that is, they need to The battery voltage VBAT needs to be stepped down). Some electrical loads (hereinafter referred to as the second electrical load 132) need to use a supply voltage of 8~9V (that is, the battery voltage VBAT needs to be stepped up). The DC converter 152 may include a step-down voltage. voltage converter 1521 and boost converter 1522. Among them, after the buck converter 1521 steps down the battery voltage VBAT, the step-down voltage is used to power the first electrical load 131. After the step-up converter 1521 steps up the battery voltage VBAT, the step-up voltage is The second electrical load 132 supplies power.

In one example, when the number of switched capacitor circuits in the second switched capacitor (SC) circuit 151 is 1, the circuit structure of the electric energy storage module is as shown in FIG. 13 . Specifically, FIG. 13 shows a schematic structural diagram of an exemplary power processing circuit provided by an embodiment of the present application. Referring to FIG. 13 , the power processing circuit 150 may also include a thirteenth switch S13 and a fourteenth switch S14. The thirteenth switch S13 is disposed between the second connection end of the fifth switch S5 and the buck converter 1521. When it is necessary to provide an input voltage to the buck converter 1521, the thirteenth switch S13 can be controlled to be turned on. In addition, the fourteenth switch S14 is disposed between the fifth switch S5 and the boost converter 1522. When it is necessary to provide an input voltage to the boost converter 1521, the fourteenth switch S14 can be controlled to be turned on.

In another example, when the number of switched capacitor circuits in the second switched capacitor circuit 151 is multiple (2 or 3), taking the terminal device including 2 switched capacitor circuits as an example, the circuit of the electric energy storage module The structure can be shown in Figure 14. Specifically, FIG. 14 shows a schematic structural diagram of another exemplary power processing circuit provided by an embodiment of the present application. Referring to FIG. 14 , the power processing circuit may also include a third switched capacitor circuit 153 . And, the power processing circuit 150 may also include a fifteenth switch S15, a sixteenth switch S16, and a third capacitor C3. The second switched capacitor circuit 151 can be connected to the buck converter 1521 through the fifth switch S5, and the third switched capacitor circuit 153 can be connected to the boost converter 1522 through the fifteenth switch S15. The second connection terminal of the fifteenth switch S15 can also be connected to the third reference potential terminal (such as ground GND3 in Figure 14) through the third capacitor C3. It should be noted that the third reference potential terminal and other reference potential terminals can be the same potential end or different potential end, there is no specific restriction on this). The first connection end of the sixteenth switch S160 is used to obtain the system voltage VPH or the battery voltage VBAT, and the second connection end of the sixteenth switch S16 is used to connect the boost converter 1522 . It should be noted that the third switched capacitor circuit 153 is similar to the second switched capacitor circuit 151, the fifteenth switch S15 is similar to the fifth switch S5, the sixteenth switch S16 is similar to the sixth switch S6, and the third capacitor C3 is similar to the fifth switch S5. The two capacitors C2 are similar. Please refer to the relevant descriptions in the above-mentioned parts of the embodiments of this application, which will not be described again.

It should be noted that for other contents of the buck converter 1521 and the boost converter 1522 in the embodiment of the present application, please refer to the relevant descriptions in the above parts of the embodiment of the present application, and will not be described again.

After introducing the power processing circuit through the above embodiments, the analog-to-digital converter 160 will be described next.

The analog-to-digital converter 160 includes a positive input terminal Vin+ and a negative input terminal Vin-, wherein the positive input terminal Vin+ is connected to the positive electrode of the battery 120, and the negative input terminal Vin- is connected to the negative electrode of the battery 120, thereby through the analog The digital converter 160 can collect the battery voltage VBAT (that is, the voltage difference across the battery 120 ), perform analog-to-digital conversion on the collected battery voltage VBAT, and then transmit the battery voltage VBAT in a digital signal format to the system chip 170 . For example, the analog-to-digital converter 160 can be implemented as an analog-to-digital converter chip or other detection device with a digital-to-analog conversion function, and there is no specific limitation on this. Furthermore, it should be noted that in the embodiments of the present application, circuits, components or functional modules with a voltage acquisition function other than analog-to-digital converters may also be used, and there is no specific limitation on this.

The system chip 170 can be implemented as a control chip. Exemplarily, FIG. 15 shows a schematic structural diagram of a system chip provided by an embodiment of the present application. As shown in FIG. 15, the system chip 170 includes a first pin P1, a second pin P2, and a third pin P3. and the fourth pin P4 (hereinafter referred to as the first pin P1-the fourth pin P4), wherein the first pin P1 is connected to the analog-to-digital converter 160, the second pin P2 is connected to the SC chip A1, and the The third pin P3 is connected to the fifth switch S5, and the fourth pin P4 is connected to the sixth switch S6. For example, the third pin P3 and the fourth pin P4 may be connected to the control end of the switch through the gate controller.

It should be noted that when the power processing circuit 150 includes other devices that need to be controlled, the power processing circuit 150 can also be connected to other devices that need to be controlled through other pins. For example, the power processing circuit 150 also includes the above-mentioned seventh switch S7-th. One or more of the sixteen switches S16, or other switches, can also be connected to the other switches mentioned above through other pins, which will not be described again. And, when the power processing circuit also includes other SC chips, such as the SC chip including the third switched capacitor circuit 153, it can also be connected to the above-mentioned other SC chips through other pins, and there is no specific limitation on this. For example, the first to fourth pins P1 to P4 may be general-purpose input/output ports (GeneralPurpose Input/Output Port, GPIO). It should be noted that the above-mentioned pins can also be other pins that can be connected to devices, and there is no specific restriction on this. For example, the above-mentioned pins can be connected to each device through an integrated circuit (inter-integrated circuit, I2C) bus, or connected to each device through other buses, and there is no specific limitation on this.

In the embodiment of the present application, the system chip 170 can be used to control the on or off of each switch in the power processing circuit 150 to control the power transmission process of the battery 120, such as controlling the charging process of the battery 120. And realize the control of the power supply process of the electric load 130 by the battery 120, etc.

In some embodiments, the system chip 170 can control the charging control switch S0 to be turned on or off according to the charging state. Specifically, the system chip 170 can control the charging control switch S0 to turn on when detecting that the terminal device is connected to a charger, and control the charging control switch S0 to turn on when detecting that the terminal device is not connected to a charger. S0 is disconnected.

For example, when the real-time voltage of the charging interface 110 can be used to indicate whether the terminal device is connected to a charger, the system chip 170 can determine whether the real-time voltage of the charging interface 110 is greater than or equal to the preset voltage threshold. , controlling the charging control switch S0 to turn on. And, when the real-time voltage of the charging interface 110 is less than the preset voltage threshold, the charging control switch S0 is controlled to be turned off. Among them, the preset voltage threshold can be set to a value less than the charging voltage VBUS, such as 2V, according to actual conditions and specific scenarios. There is no limit to this. Through this embodiment, when the terminal device is connected to a charger, the charging control switch S0 can be controlled to be turned on, so that the charger can charge the battery 120 normally. In addition, when the terminal device is not connected to the charger, the charging control switch S0 can be controlled to be turned off, thereby avoiding waste of electric energy caused by the flow of current to the charging interface 110, thereby improving the electric energy utilization rate. It should be noted that, continuing to refer to FIG. 15 , when the second switched capacitor circuit 151 (including the charge control switch S0 ) is a circuit of the SC chip A1 , and the SC chip A1 also includes a switched capacitor controller A11 , the system chip 170 can A charging control signal is sent to the switched capacitor controller A11, and the switched capacitor controller A11 responds to the charging control signal and controls the charging control switch S0 to be turned on or off. Alternatively, when the charge control switch S0 is provided outside the SC chip A1, the system chip 170 can also directly control the charge control switch S0, which is not specifically limited.

In some embodiments, the system chip 170 can control the turn-on or turn-off of the sixth switch S6. Specifically, when it is necessary to provide an input voltage to the DC converter 152 using a conventional power consumption method, the sixth switch S6 can be controlled to be turned on to provide the system voltage VPH or the battery voltage VBAT as the input voltage of the DC converter 152 . Moreover, when it is necessary to use the power consumption method provided by the embodiment of the present application to provide the DC converter 152 with the input voltage obtained by the second switched capacitor circuit 151's equal proportional step-down or equal-proportion step-up, the sixth switch S6 can be controlled to be turned off.

In one embodiment, the sixth switch S6 can be controlled to be turned on in the charging mode. For example, when the real-time voltage of the charging interface 110 is greater than or equal to the preset voltage threshold, that is, when the terminal device is connected to a charger, the sixth switch S6 can be controlled to be turned on. Therefore, the second switched capacitor circuit 151 can be used to quickly charge the battery 120 while ensuring normal power supply to the electrical load 130 through the DC converter 152 .

In another embodiment, the sixth switch S6 can be controlled to be turned on when the input voltage obtained by the second switched capacitor circuit 151 equal proportional step-down or equal proportion step-up cannot ensure the normal operation of the DC converter 152 .

In a specific embodiment, when the DC converter 152 includes the buck converter 1521 and the battery voltage VBAT is less than the first voltage threshold, the sixth switch S6 can be controlled to be turned on.

The first voltage threshold may be a critical voltage value for whether the second switched capacitor circuit 151 needs to reduce voltage according to a fixed ratio. Specifically, the first voltage threshold is determined based on the voltage reduction ratio of the second switched capacitor circuit 151 and the minimum input voltage of the buck converter 1521 , where the minimum input voltage may be an input that enables the buck converter 1521 to operate normally. The minimum value in voltage, the minimum input voltage is greater than or equal to the fixed output voltage. And, since the minimum input voltage may be determined based on the fixed output voltage and the minimum voltage difference of the buck converter 1521, for example, the difference between the minimum input voltage and the fixed output voltage is equal to the minimum voltage difference. Correspondingly, the first voltage threshold can also be determined based on the output voltage of the buck converter 1521, the minimum voltage difference of the buck converter 1521, and the voltage reduction ratio of the second switched capacitor circuit 151, where the minimum voltage difference can be When the voltage converter 1521 operates normally, the minimum voltage difference required between the input terminal and the output terminal of the buck converter 1521 is required.

Illustratively, the product of the first voltage threshold and the buck ratio is greater than or equal to the minimum input voltage of the buck converter 1521 . For example, continuing to take FIG. 10C as an example, if the output voltage is 1.2V, the minimum input voltage is 1.5V, and the voltage reduction ratio is 1/2, the first voltage threshold can be greater than or equal to 3V.

In another example, when the buck converter 1521 includes multiple buck devices, and each buck device corresponds to an output voltage, the product of the first voltage threshold and the buck ratio is greater than or equal to the multiple buck devices. The maximum value of the minimum input voltage to ensure that multiple buck devices can operate normally. For example, continuing to refer to FIG. 11A , the buck converter 1521 includes a first buck device 1521A, a second buck device 1521B and a third buck device 1521C, and the minimum voltage between the first buck device 1521A and the third buck device 1521C is When the input voltages are 1.4V, 1.5V, and 2.1V respectively, the maximum value of the minimum input voltage of the three buck devices is 2.1V. If the buck ratio of the second switched capacitor circuit 151 is 1/2, then the A voltage threshold may be greater than or equal to 4.2V. It should be noted that in this example and subsequent examples, the first voltage threshold can also be determined based on the voltage reduction ratio of the second switched capacitor circuit 151, the output voltage of each voltage reduction device, and the minimum voltage difference of the buck converter 1521, The specific calculation method can be found in the relevant description of the previous example, and will not be repeated here.

In yet another example, when the buck converter 1521 includes multiple buck devices, the first voltage threshold may be determined based on the buck ratio of the second switched capacitor circuit 151 and the minimum input voltage of the buck device that is operating, For example, if only the second buck device (BUCK) 1521B is currently supplying power to the load, its minimum input voltage is 1.5V, and if the buck ratio is 1/2, the first voltage threshold can be greater than or equal to 3V.

In yet another example, when the buck converter 1521 includes multiple buck devices, the first voltage threshold can be determined based on the power consumption of the subloads connected to the multiple buck devices. For example, if the second buck device 1521B has the largest power consumption, and the minimum input voltage is 1.5V. If the voltage reduction ratio of the second switched capacitor circuit 151 is 1/2, the first voltage threshold can be greater than or equal to 3V. Optionally, in order to ensure the normal operation of the first buck device 1521A, the switch S6 can be controlled to be turned on using a conventional power method, so that the battery voltage VBAT or the system voltage VPH is used as the input voltage of the first buck device 1521A.

In yet another example, when the buck converter 1521 includes multiple buck devices, the product of the first voltage threshold and the buck ratio is greater than or equal to the minimum value of the minimum input voltages of the multiple buck devices. For example, assuming that the voltage reduction ratio of the second switched capacitor circuit 151 is 1/2, and the minimum input voltages of the first voltage reduction device 1521A-the third voltage reduction device 1521C are 1.4V, 1.5V, and 2.1V respectively, If the battery voltage VBAT is greater than or equal to 4.2V, the bucked output voltage of the second switched capacitor circuit 151 can be used as the input voltage of the first buck device 1521A to the third buck device 1521C; if the battery voltage VBAT is less than 4.2V and is greater than or equal to 3V (at this time, the third buck device 1521C cannot operate normally using the bucked voltage), then the bucked output voltage of the second switched capacitor circuit 151 can be used as the first buck device 1521A and the third buck device 1521A. The input voltage of the second buck device 1521B; if the battery voltage VBAT is less than 3V and greater than or equal to 2.8V (at this time, the second buck device 1521B and the third buck device 1521C cannot operate normally with the bucked voltage), then The stepped-down output voltage of the second switched capacitor circuit 151 may be used as the input voltage of the first buck device 1521A. Optionally, for a buck device that cannot operate normally using the bucked voltage, the battery voltage VBAT or the system voltage VPH can be used as the input voltage.

It should be noted that the first voltage threshold can also be set according to other methods, such as setting it as an empirical value, etc., and there is no specific limitation on this.

In another specific embodiment, when the DC converter 152 includes the boost converter 1522 and the battery voltage VBAT is greater than or equal to the second voltage threshold, the sixth switch S6 may be controlled to be turned on.

The second voltage threshold may be a critical voltage value that determines whether the second switched capacitor circuit 151 needs to be boosted according to a fixed ratio. Specifically, the second voltage threshold may be determined based on the boost ratio of the second switched capacitor circuit 151 and the maximum input voltage of the boost converter 1522 . Wherein, the maximum input voltage may be the maximum value of the input voltages that can enable the boost converter 1522 to operate normally, and the maximum input voltage is less than the fixed output voltage. And, since the maximum input voltage may be determined based on the fixed output voltage and the minimum voltage difference of the boost converter 1522, for example, the difference between the fixed output voltage and the maximum input voltage is equal to the minimum voltage difference. Correspondingly, the second voltage threshold can also be determined based on the output voltage of the buck converter 1521, the minimum voltage difference of the buck converter 1521, and the voltage reduction ratio of the second switched capacitor circuit 151. The minimum voltage difference may be the minimum voltage difference required between the output end and the input end of the boost converter 1522 when the boost converter 1522 operates normally.

Illustratively, the product of the second voltage threshold and the boost ratio is less than or equal to the maximum input voltage of boost converter 1522 .

In another example, when the boost converter 1522 includes multiple boost devices and each boost device corresponds to an output voltage, the product of the second voltage threshold and the boost ratio is less than or equal to the multiple boost devices. The minimum value of the maximum input voltage to ensure that multiple boost devices can work normally.

In yet another example, when the boost converter 1522 includes multiple boost devices, the second voltage threshold may be determined based on the boost ratio of the second switched capacitor circuit 151 and the maximum input voltage of the working buck device.

In yet another example, when the boost converter 1522 includes multiple boost devices, the second voltage threshold may be determined based on the power consumption of the subloads connected to the multiple boost devices.

In yet another example, when the boost converter 1522 includes multiple boost devices, the product of the second voltage threshold and the boost ratio is less than or equal to the maximum value of the maximum input voltages of the multiple boost devices, so that the The input voltage of at least some of the working boost devices is boosted, and for some of the boost devices that cannot work normally, the battery voltage VBAT or the system voltage VPH can be used as the input voltage of the boost device by turning on the sixth switch S6. Input voltage.

It should be noted that the second voltage threshold can also be set according to other methods, such as setting it as an empirical value, etc., and there is no specific limitation on this. It should be noted that the above-mentioned specific implementation of how to determine the second voltage threshold is similar to the example of how to determine the first voltage threshold. Please refer to the relevant descriptions in the above-mentioned parts of the embodiments of this application, which will not be described again.

In some embodiments, the system chip 170 can control the conduction or disconnection of the first switch S1 - the fourth switch S4 and the fifth switch S5 in the second switched capacitor circuit 151 at different control stages of the power processing process. Next, the specific control process of the system chip 170 will be described according to the control stages.

In some embodiments, when the DC converter 152 includes the buck converter 1521 and the battery voltage VBAT is greater than or equal to the first voltage threshold, the system chip 170 may periodically switch the first switch S1 to the fifth switch S5 Perform on-off control. Specifically, Figure 16 shows an exemplary control logic diagram provided by the embodiment of the present application. As shown in Figure 16, in each cycle, control can be performed according to the first control stage D1 to control the second The capacitor C2 is charged, and then controlled according to the control logic of the second control stage D2 to use the second capacitor C2 to provide an input voltage to the buck converter 1521 . For example, in each cycle, the ratio of the duration T1 of the first control phase D1 to the duration of the entire cycle (T1+T2) may be 90%. It should be noted that the system chip 170 can also use the second switched capacitor circuit 151 to provide an equally proportionally reduced input voltage for the buck converter 1521 in other situations, according to the first control stage D1 and the second control stage D2. The control logic is used for control, and there are no specific restrictions on this.

In the first control stage D1, the system chip 170 can control the first switch S1, the third switch S3, and the fifth switch S5 to be on, and control the second switch S2 and the fourth switch S4 to be off.

In the second control stage D2, the system chip 170 may control the fifth switch S5 to turn off.

In one embodiment, when the second switched capacitor circuit 151 belongs to the SC chip A1, the system chip 170 may send a voltage reduction control signal to the switched capacitor controller A11, so that the switched capacitor controller A11 controls the first switch S1- The fourth switch S4 is controlled so that the power processing circuit A1 can reduce the battery voltage VBAT according to a fixed proportion.

For example, continuing to refer to FIG. 10A , the switched capacitor controller A11 may control the first switch S1 and the third switch S3 to turn on in the first control stage D1 in response to the buck control signal, and control the second switch S2 and the third switch S2 . The four switches S4 are turned off; and in the second control phase D2, the first switch S1 - the fourth switch S4 can be controlled to remain unchanged according to the on-off state of the first control phase D1 (or all the first switches S1 - the fourth switch S4 can be controlled disconnect). In one example, the system chip 170 may send a control signal to the switched capacitor controller A11 when starting control and ending control. Specifically, the system chip 170 can send a voltage reduction start signal to the switched capacitor controller A11 when the battery voltage VBAT meets the preset voltage reduction condition, so that the switched capacitor controller A11 periodically follows the first control stage D1 and The control logic of the second control stage D2 controls the first switch S1 - the fourth switch S4, and when it is necessary to end the equal-proportional voltage reduction of the second switched capacitor circuit 151, the system chip 170 sends a signal to the switched capacitor controller A11 The voltage reduction end signal is used so that the switched capacitor controller A11 no longer continues to control the first switch S1 - the fourth switch S4 according to the control logic of the first control stage D1 and the second control stage D2 (it can stop controlling the first switch S1 - the fourth switch S4 Control of the fourth switch S4, or continue to control the first switch S1 to the fourth switch S4 according to other control logic). In another example, the system chip 170 may send a control signal to the switched capacitor controller A11 in each control stage to alternately perform switching control of the first control stage D1 and the second control stage D2. Specifically, the system chip 170 may send a first control signal to the switched capacitor controller A11 each time it needs to enter the first control stage D1, so that the switched capacitor controller A11 responds to the first control signal and performs the operation according to the first control stage. The control logic of D1 controls the first switch S1 to the fourth switch S4. And, each time it is necessary to enter the second control stage D2, the system chip 170 sends a second control signal to the switched capacitor controller A11, so that the switched capacitor controller A11 responds to the second control signal, according to the second control stage D2. The control logic controls the first switch S1 to the fourth switch S4.

In one embodiment, the second switched capacitor circuit 151 can send a first pulse signal to the control end of the fifth switch S5 through the third pin P3, wherein the waveform of the first pulse signal can be referred to Figure 16. In the first control In the stage D1, the first pulse signal is in a first level state (such as a high level state) to control the fifth switch S5 to turn on; and in the second control stage D2, the first pulse signal is in a second level state (such as a high level state). low level state) to control the fifth switch S5 to open. For example, the duty cycle of the first pulse signal may be 90%. Optionally, the duty cycle of the first pulse signal can be adjusted according to the second capacitor C2. For example, if the duty cycle of the first pulse signal is 80%, the power of the second capacitor C2 is insufficient for the buck converter 1521 When providing a stable input voltage (for example, the voltage of the second capacitor C2 will drop by 10% during the second control stage D2. It should be noted that it can also be determined that the second capacitor C2 cannot provide the input voltage when the drop exceeds other amplitude values. Stable output voltage, no specific restrictions on this), the duty cycle of the first pulse signal can be increased, for example, to 90% (it can also be other ratios, such as 85%, etc., no specific restrictions on this).

In other embodiments, when the DC converter 152 includes the boost converter 1522 and the battery voltage VBAT is less than or equal to the second voltage threshold, the system chip 170 may periodically switch the first switch S1 - The fifth switch S5 performs on-off control. For example, in each cycle, the first capacitor C1 can be charged according to the third control stage D3, and then controlled according to the control logic of the fourth control stage D4 to utilize the series-connected batteries 120 and The second capacitor C2 provides an input voltage to the boost converter 1522 .

In the third control stage D3, the system chip 170 can control the second switch S2 and the fourth switch S4 to be turned on, and the first switch S1, the third switch S3 and the fifth switch S5 to be turned off.

In the fourth control stage D4, the system chip 170 can control the first switch S1, the third switch S3 and the fifth switch S5 to be turned on, and the second switch S2 and the fourth switch S4 to be turned off.

For example, the system chip 170 may send a control signal to the switched capacitor controller A11, so that the switched capacitor controller A11 controls the first switch S1 to the fourth switch S4 according to the control logic of the third control stage D3 and the fourth control stage D4. Take control. For the specific control method, please refer to the control of the SC control A11 by the system chip 170 in the first control stage D1 and the second control stage D2, which will not be described again.

For example, the system chip 170 may send a second pulse signal to the control end of the fifth switch S5 through the third pin P3, so as to use the second pulse signal to control the conduction or disconnection of the fifth switch S5. In the third control stage D3, the second pulse signal is in a second level state (such as a low level state) to control the fifth switch S5 to turn off; and in the fourth control stage D4, the second pulse signal is in the first level state. flat state (such as a high level state) to control the fifth switch S5 to turn on. The duty cycle of the second pulse signal can be provided according to the first capacitor C1. For example, when the first capacitor C1 cannot provide a stable voltage, the duty cycle of the second pulse signal is increased. It should be noted that for other contents of the second pulse signal, please refer to the relevant description of the first pulse signal in the above-mentioned part of the embodiment of the present application, and will not be described again.

Optionally, referring to the power processing circuit shown in FIG. 11B , the system chip 170 can also control the seventh switch S7 - the twelfth switch S12. When it is necessary to supply power to the first sub-load 131A, in the first control phase D1, the system chip 170 can control the tenth switch S10 to turn on, and in the second control phase D2, it can also control the seventh switch S7 and the tenth switch S10. conduction. Similarly, when power needs to be supplied to the second subload 131B, the system chip 170 can also control the eighth switch S8 and the eleventh switch S11. When power needs to be supplied to the third subload 131C, the system chip 170 can also control the ninth switch 9 and the twelfth switch S12. It should be noted that, for the control methods of the eighth switch S8 and the eleventh switch S11, and the ninth switch 9 and the twelfth switch S12, please refer to the relevant description of the control methods of the seventh switch S7 and the tenth switch S10. This will not be described again.

Optionally, continuing to refer to the power processing circuit shown in Figure 13, the system chip 170 can also control the thirteenth switch S13 to turn on and the fourteenth switch S14 to turn off when it is necessary to provide an input voltage to the buck converter 1521; And, when it is necessary to provide an input voltage to the boost converter 1521, the fourteenth switch S14 can be controlled to be turned on and the thirteenth switch S13 to be turned off.

Optionally, continuing to refer to the power processing circuit shown in FIG. 14 , the system chip 170 can also control the third switched capacitor circuit 153 , and the control method can be found in the above-mentioned part of the embodiment of the present application regarding the second switched capacitor circuit 151 . illustrate. In addition, the system chip 170 can also control the fifteenth switch S15. For its control method, please refer to the relevant description of the fifth switch S5 in the above-mentioned part of the embodiment of this application. In addition, the system chip 170 can also control the sixteenth switch S16. For the control method, please refer to the relevant description of the sixth switch S6 in the above part of the embodiment of this application.

It should be noted that since the power conversion efficiency of DC converters such as boost converters and buck converters is generally around 80%, the power conversion efficiency of switched capacitor modules generally reaches around 96% to 98%. Since the power conversion efficiency of the above-mentioned DC converter increases as the voltage difference across the DC converter increases, in the circuit provided by the embodiment of the present application, a switched capacitor module is provided before the DC converter, and the boost converter is The method of boosting the input voltage of the buck converter and bucking the input voltage of the buck converter can reduce the voltage difference across the DC converter such as the boost converter and the buck converter, and improve the efficiency of the DC converter. The power conversion efficiency allows the power conversion efficiency of the power processing circuit to reach more than 85%. When the battery supplies power to the electrical load through the power processing circuit, the utilization rate of battery power can be improved, thereby improving the battery life of the terminal device. .

In addition, this embodiment of the present application also provides another power processing circuit. FIG. 17 shows a schematic structural diagram of another terminal device provided by this embodiment of the present application. Comparing FIG. 8 and FIG. 17 , it can be seen that the difference is that the terminal device 100 also includes a fourth switched capacitor circuit 154 .

One end of the fourth switched capacitor circuit 154 is connected to the charging interface 110 , and the other end of the fourth switched capacitor circuit 154 is connected to one end of the battery 120 . The fourth switched capacitor circuit 154 is disposed on the battery charging line. After obtaining the charging voltage VBUS through the charging interface 110, the fourth switched capacitor circuit 154 performs a voltage reduction process according to a preset voltage reduction ratio, and uses the reduced voltage to provide battery power. 120 for fast charging.

It should be noted that, for the specific content of the second switched capacitor circuit 151, please refer to the above-mentioned part of the embodiment of the present application in conjunction with the relevant description of any embodiment in FIGS. 8-16, and will not be described again.

Through this embodiment, the fourth switched capacitor circuit 154 can be used for fast charging, and the second switched capacitor circuit 151 can be used for power supply, which improves the independence of the fast charging process and the power supply process and avoids mutual influence.

In addition, this embodiment of the present application also provides another power processing circuit, and FIG. 18 shows a schematic structural diagram of yet another terminal device provided by this embodiment of the present application. Comparing Figure 8 and Figure 18, it can be seen that the difference is that the terminal device 100 also includes a buck converter 155, a fifth switched capacitor circuit 156, a seventeenth switch S17 and a fourth capacitor C4.

One end of the buck converter 155 is connected to the charging interface 110 , the other end of the buck converter 155 is connected to one end of the fifth switched capacitor circuit 156 through the seventeenth switch S17 , and the other end of the buck converter 155 is also connected through The fourth capacitor is connected to the fourth reference potential terminal (such as ground GND4 in Figure 18). The other end of the fifth switched capacitor circuit 156 is connected to one end of the battery 120 . For the buck converter 155, please refer to the relevant description of the buck converter 144 in the above-mentioned part of the embodiment of this application, which will not be described again. And, for the fifth switched capacitor circuit 156, please refer to the relevant description of the second switched capacitor circuit 152 in the above-mentioned part of the embodiment of this application. For the specific content of the seventeenth switch S17, please refer to the relevant description of S5 in the above-mentioned part of the embodiment of this application. For the four capacitors C4, please refer to the relevant description of the second capacitor C2 in the above-mentioned part of the embodiment of this application, and will not be described again here.

In the reverse charging stage, through the control of the seventeenth switch S17 and the fifth switched capacitor circuit 156 (for specific control logic, please refer to the relevant description of the third control stage D3 and the fourth control stage D4 in the above part of the embodiment of this application, (Not going to go into details here), after the battery voltage VBAT can be boosted in an equal proportion (such as 2*VBAT), the voltage at the other end of the buck converter 155 can be adjusted to 2VBAT, thereby reducing the voltage of the buck converter 155 The voltage difference between the two terminals improves the power conversion efficiency of the buck converter 155, thereby improving the battery's power utilization and improving the battery's endurance.

And, based on the same inventive concept, the embodiment of the present application also provides a power processing method, which is applied to the power processing module shown in the embodiment of the present application in conjunction with any embodiment of FIG. 8 to FIG. 17 .

Figure 19 shows a schematic flowchart of a power processing method provided by an embodiment of the present application. As shown in Figure 19, the power processing method may include the following steps S11-S17.

S11, the system chip 170 obtains the charging voltage VBUS. The charging voltage VBUS may be collected in real time from the charging interface 110 by an analog-to-digital converter.

S12, the system chip 170 determines whether the charging voltage VBUS is less than the preset voltage threshold Vc. Wherein, if the judgment result is yes, that is, the charging voltage VBUS is less than the preset voltage threshold Vc, jump to step S13, and if the judgment result is no, that is, the charging voltage VBUS is greater than or equal to the preset voltage threshold Vc, Jump to step S17.

For the preset voltage threshold Vc, please refer to the above-mentioned relevant descriptions of the embodiments of the present application, and will not be described again here.

S13: When the charging voltage VBUS is greater than or equal to the preset voltage threshold Vc, the system chip 170 obtains the battery voltage VBAT. The battery voltage VBAT may be collected in real time from both ends of the battery 120 by the analog-to-digital converter 160 .

S14, the system chip 170 determines whether the battery voltage VBAT is greater than or equal to the first voltage threshold Va. Wherein, if the determination result is yes, that is, if the battery voltage VBAT is greater than or equal to the first voltage threshold Va, step S15 is skipped. And, if the determination result is no, that is, if the battery voltage VBAT is less than the first voltage threshold Va, step S17 is skipped.

For the first voltage threshold Va, reference may be made to the relevant descriptions in the above-mentioned parts of the embodiments of this application, which will not be described again.

S15, the system chip 170 sends a voltage reduction control signal to the switched capacitor controller A11.

S16, the switched capacitor controller A11 responds to the voltage reduction control signal and periodically controls the first switch S1 to the fourth switch S4 according to the control logic of the first control stage D1 and the second control stage D2. And, the system chip 170 periodically controls the fifth switch S5 according to the control logic of the first control stage D1 and the second control stage D2.

Among them, in the first control stage D1, as shown in steps S161-S165, the switched capacitor controller A11 controls the first switch S1 and the third switch S3 to be turned on, and controls the second switch S2 and the fourth switch S4 to be turned off, and the system The chip 170 can control the fifth switch S5 to be turned on to use the battery 120 to charge the first capacitor C1 and the second capacitor C2. And, after the charging is completed, the second control stage D2 is entered. For its specific content, please refer to the above-mentioned part of the embodiment of the present application in conjunction with the relevant description of FIG. 10A , and will not be described again here.

In the second control stage D2, as shown in step S166, the system chip 170 can control the fifth switch S5 to turn off to use the divided voltage VBAT*C2/(C1+C2) of the second capacitor C2 to provide the buck converter 1521 with Input voltage. And, after the discharge is completed, the first control stage D1 is re-entered. For its specific content, please refer to the above-mentioned part of the embodiment of the present application in conjunction with the relevant description of FIG. 10B , and will not be described again here.

In some embodiments, when a control switch is provided at one end of the second capacitor C2, in the second control stage D2, the switched capacitor (SC) controller A11 can control the first switch S1 and the fourth switch S4 to conduct, The second switch S2 and the third switch S3 are disconnected from the control switch, and the system chip 170 can control the fifth switch S5 to be turned on to utilize the divided voltage VBAT*C1/(C1+C2) of the first capacitor C1 for buck conversion. Device 1521 provides the input voltage. In one example, for the circuit shown in FIG. 11A , if the divided voltage of the second capacitor C1 is 3/4 of the battery voltage VBAT, and the divided voltage of the second capacitor C2 is 1/4 of the battery voltage VBAT, S16 includes: In the second control stage D2, the divided voltage of C1 can be used to provide the input voltage for the second buck device 1521B and the third buck device 1521C, or the divided voltage of C2 can be used to provide the input voltage for the first buck device 1521A. For its specific content, please refer to the above-mentioned part of the embodiment of the present application in conjunction with the relevant description of FIG. 11A , and will not be described again here. In yet another example, for the same buck converter 1521, when the battery voltage VBAT is greater than or equal to the first voltage threshold and less than or equal to the third voltage threshold Vc, the first capacitor C1 can be used to convert the buck converter 1521 Provide input voltage. And, when the battery voltage VBAT is greater than the third voltage threshold, the second capacitor C2 is used to provide the input voltage to the buck converter 1521 .

In some embodiments, for the circuit shown in FIG. 11B , in the first control phase D1 and the second control phase D2, when it is necessary to supply power to any subload connected to the buck power supply, the system chip 170 can control the buck power supply. The switch connected to the voltage is turned on, and the switch connected to the capacitive element corresponding to the voltage reduction is controlled to be turned on. For its specific content, please refer to the above-mentioned part of the embodiment of the present application in conjunction with the relevant description of FIG. 11B, and will not be described again here.

S17, when the charging voltage VBUS is greater than or equal to the preset voltage threshold Vc, or when the battery voltage VBAT is greater than or equal to the first voltage threshold Va, the system chip 170 controls the sixth switch S6 to turn on. Optionally, in order to ensure power supply performance, the system chip 170 can also control the fifth switch S5 to turn off.

And, based on the same inventive concept, the embodiment of the present application also provides another power processing method, which is applied to the power processing module shown in the embodiment of the present application in conjunction with any embodiment of FIG. 8 to FIG. 17 .

Figure 20 shows a schematic flowchart of another power processing method provided by an embodiment of the present application. As shown in Figure 20, the power processing method may include the following steps S11-S17.

S21, the system chip 170 obtains the charging voltage VBUS. The charging voltage VBUS may be collected in real time from the charging interface 110 by an analog-to-digital converter.

S22, the system chip 170 determines whether the charging voltage VBUS is less than the preset voltage threshold Vc. Wherein, if the judgment result is yes, that is, the charging voltage VBUS is less than the preset voltage threshold Vc, jump to step S23, and if the judgment result is no, that is, the charging voltage VBUS is greater than or equal to the preset voltage threshold Vc, Jump to step S27.

For the preset voltage threshold Vc, please refer to the above-mentioned relevant descriptions of the embodiments of the present application, and will not be described again here.

S23, when the charging voltage VBUS is greater than or equal to the preset voltage threshold Vc, the system chip 170 obtains the battery voltage VBAT. The battery voltage VBAT may be collected in real time from both ends of the battery 120 by the analog-to-digital converter 160 .

S24, the system chip 170 determines whether the battery voltage VBAT is less than or equal to the second voltage threshold Vb. Wherein, if the determination result is yes, that is, if the battery voltage VBAT is less than or equal to the second voltage threshold Vb, step S25 is skipped. And, if the determination result is no, that is, if the battery voltage VBAT is greater than the second voltage threshold Vb, step S27 is skipped.

For the second voltage threshold Vb, reference may be made to the relevant descriptions in the above-mentioned parts of the embodiments of this application, which will not be described again.

S25, the system chip 170 sends the boost control signal to the switched capacitor controller A11.

S26, the switched capacitor controller A11 responds to the boost control signal and periodically controls the first switch S1 to the fourth switch S4 according to the control logic of the third control stage D3 and the fourth control stage D4. And, the system chip 170 periodically controls the fifth switch S5 according to the control logic of the third control stage D3 and the fourth control stage D4.

Among them, in the third control stage D3, as shown in steps S261-S264, the switched capacitor controller A11 controls the first switch S1 and the third switch S3 to turn off, and controls the second switch S2 and the fourth switch S4 to turn on. And, as shown in step S265A, the system chip 170 can control the fifth switch S5 to be turned off to use the battery 120 to charge the first capacitor C. And, after the charging is completed, the fourth control stage D4 is entered. For its specific content, please refer to the above-mentioned part of the embodiment of the present application in conjunction with the relevant description of FIG. 12A , and will not be described again here.

In the fourth control stage D4, as shown in steps S266-S269, the first switch S1 and the third switch S3 are turned on, and the second switch S2 and the fourth switch S4 are controlled to be turned off. And, as shown in step S265B, the system chip 170 can control the fifth switch S5 to be turned on to provide an input voltage to the boost converter 1522 using the series voltage 2*VBAT of the battery 120 and the first capacitor C1. And, after the discharge is completed, the third control stage D3 is re-entered. For its specific content, please refer to the above-mentioned part of the embodiment of the present application in conjunction with the relevant description of FIG. 12B , and will not be described again here.

S27, when the charging voltage VBUS is greater than or equal to the preset voltage threshold Vc, or when the battery voltage VBAT is greater than the second voltage threshold Vb, the system chip 170 controls the sixth switch S6 to turn on. Optionally, in order to ensure power supply performance, the system chip 170 can also control the fifth switch S5 to turn off. In some embodiments, for the circuit shown in FIG. 13 , the system chip 170 can also control the thirteenth switch S13 to turn on and the fourteenth switch S14 to turn off when it is necessary to provide an input voltage to the buck converter 1521 , and Control is performed according to the control logic of the first control stage D1 and the second control stage D2; and when it is necessary to provide an input voltage to the boost converter 1521, the fourteenth switch S14 can be controlled to be turned on and the thirteenth switch S13 can be turned off. , and control according to the control logic of the third control stage D3 and the fourth control stage D4.

And, based on the same inventive concept, the embodiment of the present application also provides another power processing method, which is applied to the power processing module shown in conjunction with FIG. 18 in the embodiment of the present application.

The power processing method includes: during the reverse charging process, the system chip 170 controls the seventeenth switch S17 and the fifth switched capacitor circuit 156 to obtain a proportionally boosted voltage, such as 2*VBAT. The proportionally boosted voltage is provided to the other end of the buck converter 155 to reduce the voltage difference across the buck converter 155 .

It should be noted that for the specific control logic of the system chip 170, please refer to the relevant descriptions in the above-mentioned part of the embodiment of the present application in conjunction with FIG. 18, and will not be described again.

It can be understood that, in order to implement the above functions, the electronic device includes corresponding hardware and/or software modules that perform each function. In conjunction with the algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving the hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions in conjunction with the embodiments for each specific application, but such implementations should not be considered to be beyond the scope of this application.

In an example, FIG. 21 shows a schematic block diagram of a device 600 according to an embodiment of the present application. The apparatus 600 may include a processor 601 and a transceiver/transceiver pin 602, and optionally a memory 603.

The various components of device 600 are coupled together by bus 604, which includes, in addition to a data bus, a power bus, a control bus, and a status signal bus. However, for the sake of clarity, various buses are referred to as bus 604 in the figure.

Optionally, the memory 603 may be used for instructions in the foregoing method embodiments. The processor 601 can be used to execute instructions in the memory 603, and control the receiving pin to receive signals, and control the transmitting pin to send signals.

The device 600 may be the electronic device or a chip of the electronic device in the above method embodiment.

All relevant content of each step involved in the above method embodiments can be quoted from the functional description of the corresponding functional module, and will not be described again here.

The above steps performed by the terminal device 100 in the power processing method provided by the embodiment of the present application can also be performed by a chip system included in the terminal device 100, where the chip system can include a processor and a Bluetooth chip. The chip system can be coupled with a memory, so that when the chip system is running, it calls the computer program stored in the memory to implement the steps performed by the electronic device 100 . The processor in the chip system may be an application processor or a non-application processor.

As mentioned above, the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still make the foregoing technical solutions. The technical solutions described in each embodiment may be modified, or some of the technical features may be equivalently replaced; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions in each embodiment of the present application.

Claims (23)

1. A power management circuit, characterized in that it is applied to electronic equipment. The electronic equipment includes a battery and a power load. The circuit includes: A first switched capacitor module, the first switched capacitor module is connected to the battery, and the first switched capacitor module is used to obtain the battery voltage and adjust the battery voltage to a first voltage; A DC converter, the DC converter is connected to the first switched capacitor module and the electrical load respectively, the DC converter is used to obtain the first voltage output by the first switched capacitor module, and convert the first switched capacitor module to the first switched capacitor module. Adjusting a voltage to a second voltage, and outputting the second voltage to the electrical load; Wherein, the absolute difference between the first voltage and the second voltage is smaller than the absolute difference between the battery voltage and the second voltage. 2. The circuit of claim 1, wherein the DC converter includes a first buck converter and the first voltage includes a first sub-voltage, The first switched capacitor module is used to step down the first voltage to obtain the first sub-voltage; Wherein, the first sub-voltage is greater than or equal to the second voltage. 3. The circuit of claim 1, wherein the DC converter includes a boost converter and the first voltage includes a second sub-voltage, The first switched capacitor module is used to boost the first voltage to obtain the second sub-voltage; Wherein, the second sub-voltage is less than or equal to the second voltage. 4. The circuit according to claim 2 or 3, characterized in that the first switched capacitor module includes: first switch; a second switch, the first connection end of the second switch is connected to the second connection end of the first switch, and the second connection end of the second switch is connected to one end of the battery; A third switch, the first connection end of the third switch is connected to the second connection end of the second switch; A fourth switch, the first connection end of the fourth switch is connected to the second connection end of the third switch, the second connection end of the fourth switch and the other end of the battery are both connected to the first reference potential end; A fifth switch, the first connection end of the fifth switch is connected to the first connection end of the first switch; A first capacitor, one end of the first capacitor is connected to the second connection end of the first switch, and the other end of the first capacitor is connected to the first reference potential end; A second capacitor has one end connected to the second connection end of the fifth switch and the input end of the DC converter respectively, and the other end of the second capacitor is connected to the second reference potential end. 5. The circuit of claim 1, wherein the power management circuit further includes: A voltage detector, the voltage detector is connected to the battery and used to collect the battery voltage of the battery; A controller, the controller is connected to the voltage detector and the first switched capacitor module respectively, and is used to obtain the battery voltage collected by the voltage detector, and adjust the voltage when the battery voltage meets the preset voltage adjustment. If conditions exist, the first switched capacitor module is controlled to adjust the battery voltage to the first voltage. 6. The circuit of claim 2, wherein the power management circuit further includes: A controller configured to control the first switched capacitor module to step down the first voltage to obtain the first sub-voltage when the battery voltage is greater than or equal to a first voltage threshold. 7. The circuit of claim 3, wherein the power management circuit further includes: A controller configured to control the first switched capacitor module to boost the first voltage to obtain the second sub-voltage when the battery voltage is less than or equal to the second voltage threshold. 8. The circuit of claim 4, wherein the DC converter includes a first buck converter, the first voltage includes a first sub-voltage, and the power management circuit further includes: A controller, configured to alternately control the first switched capacitor module according to the switch control logic of the first control stage and the second control switch; Wherein, in the first control stage, the controller controls the first switch, the third switch, and the fifth switch to be turned on, and controls the second switch and the fourth switch to be turned off. Turn on to use the battery to charge the first capacitor and the second capacitor connected in series; In the second control stage, the controller controls the fifth switch to turn off to output the voltage of the second capacitor to the input end of the first buck converter; Wherein, the first sub-voltage is the voltage of the second capacitor. 9. The circuit of claim 4, wherein the DC converter includes a boost converter, the first voltage includes a second sub-voltage, and the power management circuit further includes: A controller, configured to alternately control the first switched capacitor module according to the switch control logic of the third control stage and the fourth control switch; Wherein, in the third control stage, the controller controls the first switch, the third switch, and the fifth switch to turn off, and controls the second switch and the fourth switch to conduct. pass to connect the first capacitor in parallel with the battery; In the fourth control stage, the controller controls the first switch, the third switch, and the fifth switch to be turned on, and controls the second switch and the fourth switch to be turned off, Connect the first capacitor and the battery in series, and connect one end of the first capacitor to the input end of the boost converter; Wherein, the second sub-voltage is the sum of the battery voltage and the voltage of the first capacitor. 10. The circuit of claim 4, wherein the power management circuit further includes: A sixth switch, one end of the sixth switch is used to receive a third voltage, and the other end of the sixth switch is connected to the input end of the DC converter. 11. The circuit of claim 10, wherein the DC converter includes a first buck converter, the first voltage includes a first sub-voltage, and the power management circuit further includes: A controller configured to control the sixth switch to turn on when the battery voltage is less than a first voltage threshold to output the third voltage to the input end of the first buck converter to The first buck converter is caused to adjust the third voltage to the first sub-voltage. 12. The circuit of claim 10, wherein the DC converter includes a boost converter, the first voltage includes a second sub-voltage, and the power management circuit further includes: A controller configured to control the sixth switch to turn on when the battery voltage is greater than a second voltage threshold to output the third voltage to the input end of the boost converter, so that the The boost converter adjusts the third voltage to the second sub-voltage. 13. The circuit of claim 10, wherein the power management circuit further includes: A controller configured to obtain the charging voltage of the charging interface; when the charging voltage is greater than or equal to the preset voltage threshold, control the sixth switch to be turned on to output the third voltage to the DC converter input end of the converter, so that the DC converter adjusts the third voltage to the first voltage. 14. The circuit of claim 10, characterized in that, The third voltage is the battery voltage or system voltage. 15. The circuit of claim 1, wherein the electronic device further includes a charging interface, and the first switched capacitor module is connected to the charging interface, The first switched capacitor module is also used to obtain the fourth voltage output by the charging interface, step down the fourth voltage to obtain a fifth voltage; and output the fifth voltage to the battery to utilize The fifth voltage charges the battery. 16. The circuit of claim 1, wherein the electronic device further includes a charging interface and a second buck converter, and the power management circuit further includes a second switched capacitor module, One end of the second switched capacitor module is connected to the battery, the other end of the second switched capacitor module is connected to one end of the second buck converter, and the other end of the second buck converter is connected to The charging interface is connected, The second switched capacitor module is used to obtain the battery voltage, boost the battery voltage to obtain a sixth voltage, and output the sixth voltage to the charging interface. 17. A power management method, characterized in that it is applied to the power management circuit according to any one of claims 1 to 16, and the method includes: The first switched capacitor module obtains the battery voltage; The first switched capacitor module adjusts the battery voltage to a first voltage; a DC converter adjusts the first voltage to a second voltage; The DC converter outputs the second voltage to the electrical load to utilize the second voltage to power the electrical load, wherein the absolute difference between the first voltage and the second voltage is smaller than the battery The absolute difference between the voltage and the second voltage. 18. The method of claim 17, wherein before the first switched capacitor module adjusts the battery voltage to the first voltage, the method further includes: The voltage detector collects the voltage of the battery to obtain the battery voltage; The controller controls the first switched capacitor module to adjust the battery voltage to a first voltage when the battery voltage meets the preset voltage adjustment condition. 19. The method of claim 18, wherein the DC converter includes a first buck converter and the first voltage includes a first sub-voltage; The first switched capacitor module includes: a first switch, a second switch, a third switch and a fourth switch connected in series, a fifth switch, a first capacitor and a second capacitor; wherein, the first switch of the fifth switch The connection end is connected to the first connection end of the first switch; one end of the first capacitor is connected to the second connection end of the first switch, and the other end of the first capacitor is connected to the first reference potential end; one end of the second capacitor is connected to the second connection end of the fifth switch and the input end of the first buck converter, and the other end of the second capacitor is connected to the second reference potential end. connect; The method also includes: The controller alternately controls the first switched capacitor module according to the switch control logic of the first control stage and the second control switch; Wherein, in the first control stage, the controller controls the first switch, the third switch, and the fifth switch to be turned on, and controls the second switch and the fourth switch to be turned off. Turn on to use the battery to charge the first capacitor and the second capacitor connected in series; In the second control stage, the controller controls the fifth switch to turn off to output the voltage of the second capacitor to the input end of the first buck converter. 20. The method of claim 18, wherein the DC converter includes a boost converter and the first voltage includes a second sub-voltage: The first switched capacitor module includes: a first switch, a second switch, a third switch and a fourth switch connected in series, a fifth switch, a first capacitor and a second capacitor; wherein, the first switch of the fifth switch The connection end is connected to the first connection end of the first switch; one end of the first capacitor is connected to the second connection end of the first switch, and the other end of the first capacitor is connected to the first reference potential end; one end of the second capacitor is connected to the second connection end of the fifth switch and the input end of the boost converter respectively, and the other end of the second capacitor is connected to the second reference potential end; The method also includes: The controller alternately controls the first switched capacitor module according to the switch control logic of the third control stage and the fourth control switch; Wherein, in the third control stage, the controller controls the first switch, the third switch, and the fifth switch to turn off, and controls the second switch and the fourth switch to conduct. pass to use the first capacitor to charge the battery; In the fourth control stage, the controller controls the first switch, the third switch, and the fifth switch to be turned on, and controls the second switch and the fourth switch to be turned off, The first capacitor and the battery are connected in series, and one end of the first capacitor is connected to the input end of the boost converter. 21. The method of claim 18, wherein the DC converter includes a first buck converter and the first voltage includes a first sub-voltage, When the battery voltage meets the preset voltage adjustment condition, the controller controls the first switched capacitor module to adjust the battery voltage to the first voltage, including: When the battery voltage is less than a first voltage threshold, the controller outputs a third voltage to the input end of the first buck converter, so that the first buck converter converts the third Three voltages are adjusted to the first sub-voltage. 22. The method of claim 18, wherein the DC converter includes a boost converter and the first voltage includes a second sub-voltage, When the battery voltage is greater than the second voltage threshold, the controller outputs a third voltage to the input end of the boost converter, so that the boost converter adjusts the third voltage to the second sub-voltage. 23. An electronic device, characterized in that it includes: Battery; electrical load; The power management circuit according to any one of claims 1-16.