CN118611413A - Power supply processing circuits and electronic devices - Google Patents

Abstract

The power supply processing circuit and electronic device provided in the present application relate to the field of electronic circuit technology. In the present application, the power supply processing circuit includes a first power supply processing module and a second power supply processing module, wherein the first power supply processing module includes a first power supply input port, a first power supply processing submodule and at least one first power supply output port, and the first power supply processing submodule is used to process the alternating current provided by the alternating current power supply, and provide the processed output direct current to the first electrical device. The second power supply processing module includes a second power supply input port, a second power supply processing submodule and at least one second power supply output port, and the second power supply processing submodule is used to process the direct current provided by the direct current power supply, and provide the processed output direct current to the second electrical device. Based on the above content, the problem of low power supply reliability existing in the prior art can be improved.

Description

Power supply processing circuits and electronic devices

Technical Field

The present application relates to the technical field of electronic circuits, and in particular to a power supply processing circuit and an electronic device.

Background Art

Traditional electronic devices such as active filters and low-voltage inverters mostly use an auxiliary power supply to provide the DC power required by the whole machine, including but not limited to powering the IGBT drive, CPU, cooling fan, etc. However, the inventors have found that with such a configuration, once the auxiliary power supply is damaged, the whole machine will lose power. Therefore, there is a problem of relatively low reliability (such as safety, etc.) of the power supply.

Summary of the invention

In view of this, the purpose of the present application is to provide a power supply processing circuit and an electronic device to improve the problem of low power supply reliability in the prior art.

To achieve the above purpose, this application adopts the following technical solutions:

A power supply processing circuit, comprising:

A first power supply processing module, wherein the first power supply processing module includes a first power supply input port, a first power supply processing submodule and at least one first power supply output port. After the first power supply input port is connected to an AC power source and the at least one first power supply output port is connected to a first electrical device, the first power supply processing submodule is used to process the AC power provided by the AC power source and provide the processed output DC power to the first electrical device. The AC power source is an external power supply of the electronic device to which the power supply processing circuit is applied;

A second power supply processing module, wherein the second power supply processing module includes a second power supply input port, a second power supply processing sub-module and at least one second power supply output port. After the second power supply input port is connected to a DC power supply and the at least one second power supply output port is connected to a second electrical device, the second power supply processing sub-module is used to process the DC power provided by the DC power supply and provide the processed output DC power to the second electrical device. The DC power supply belongs to the internal power supply of the electronic device to which the power supply processing circuit is applied.

In a preferred embodiment of the present application, in the above power supply processing circuit, the first power supply processing submodule includes:

A front-stage rectifying unit, wherein the input end of the front-stage rectifying unit is connected to the first power supply input port, and the front-stage rectifying unit is at least used to rectify the alternating current input through the first power supply input port and output corresponding direct current;

A first power control unit, wherein an input end of the first power control unit is connected to an output end of the front-stage rectifying unit, and the first power control unit is at least used for performing a first voltage adjustment process on the direct current output by the front-stage rectifying unit, and outputting a corresponding direct current;

a first output unit, wherein the input end of the first output unit is connected to the output end of the first power control unit, and the output end of the first output unit is connected to the first first power supply output port, the first output unit is at least used to perform a second voltage adjustment process on the direct current output by the first power control unit, and output the corresponding direct current to the first first power supply output port, so as to drive the connected insulated gate bipolar transistor through the first first power supply output port, and the insulated gate bipolar transistor is used as a first electrical device;

A second output unit, wherein the input end of the second output unit is connected to the output end of the first power control unit, and the output end of the second output unit is connected to the second first power supply output port, and the second output unit is at least used to stabilize the direct current output by the first power control unit and output the corresponding direct current to the second first power supply output port, so as to power the connected central processing unit through the second first power supply output port, and the central processing unit is used as a first electrical device.

In a preferred embodiment of the present application, in the above power supply processing circuit, the first power control unit includes:

A pulse width modulation chip, wherein the pulse width modulation chip comprises a first power pin and a second power pin, the first power pin is connected to the output end of the front-stage rectifier unit, the pulse width modulation chip performs an initial startup operation through the power supply of the front-stage rectifier unit to output a pulse width modulation signal, and disconnects the power supply of the front-stage rectifier unit after outputting the pulse width modulation signal;

A field effect transistor, wherein the gate of the field effect transistor is connected to the output end of the pulse width modulation chip, so as to control the high potential end and the low potential end of the field effect transistor to be alternately turned on or off based on the pulse width modulation signal output by the pulse width modulation chip, and one of the drain of the field effect transistor and the source of the field effect transistor is used as the high potential end and the other is used as the low potential end, and the low potential end is grounded;

a first transformer, wherein the first transformer comprises a first primary winding and a first secondary winding, a first end of the first primary winding is connected to the output end of the front-stage rectifying unit, a second end of the first primary winding is connected to the high potential end of the field effect transistor, the first secondary winding comprises a first sub-winding, a second sub-winding and a third sub-winding, the first sub-winding is connected to the first output unit, the second sub-winding is connected to the second output unit, the third sub-winding is connected to the second power supply pin, and the third sub-winding is used to supply power to the pulse width modulation chip through the second power supply pin after the power supply of the front-stage rectifying unit is disconnected;

A clamping subunit, wherein a first end of the clamping subunit is connected to a high potential end of the field effect transistor, a second end of the clamping subunit is connected to an output end of the front-stage rectifier unit, and the clamping subunit is used to absorb a surge voltage generated when the field effect transistor is turned on.

In a preferred embodiment of the present application, in the above power supply processing circuit, the clamping subunit includes:

A first diode, wherein an anode of the first diode is connected to a high potential end of the field effect transistor;

A first capacitor, wherein a first end of the first capacitor is connected to a pin of the first diode, and a second end of the first capacitor is connected to an output end of the front-stage rectifying unit;

A first resistor, wherein a first end of the first resistor is connected to a pin of the first diode, and a second end of the first resistor is connected to an output end of the front-stage rectifying unit.

In a preferred embodiment of the present application, in the above power supply processing circuit, the first power control unit further includes a voltage feedback regulation subunit, and the voltage feedback regulation subunit includes:

A voltage reference chip, wherein an input terminal of the voltage reference chip is connected to the second sub-winding, and the voltage reference chip is used to collect the voltage output by the second sub-winding;

An optocoupler unit, wherein the input end of the optocoupler unit is connected to the output end of the voltage reference chip, the output end of the optocoupler unit is connected to the voltage feedback pin of the pulse width modulation chip, and the optocoupler unit is used to feed back the voltage change output by the second sub-winding to the pulse width modulation chip through the voltage feedback pin, so that the pulse width modulation chip adjusts the duty cycle of the output pulse width modulation signal based on the voltage change to output a stable voltage.

In a preferred embodiment of the present application, in the above-mentioned power supply processing circuit, the voltage feedback regulation subunit further includes a soft start component, and the soft start component is used to make the voltage value of the voltage feedback pin of the pulse width modulation chip reach the wave threshold when the pulse width modulation chip is initially started by the power supply of the front-stage rectifier unit, so that the pulse width modulation chip can output a pulse width modulation signal, and the soft start component includes:

A second diode, wherein an anode of the second diode is connected to a voltage feedback pin of the pulse width modulation chip;

a third diode, wherein an anode of the third diode is connected to a cathode of the second diode, and a cathode of the third diode is connected to the second power pin;

a fourth diode, wherein an anode of the fourth diode is grounded, and a cathode of the fourth diode is connected to a cathode of the second diode;

a second resistor, wherein a first end of the second resistor is connected to the cathode of the second diode, and a second end of the second resistor is connected to the second power pin;

A second capacitor, wherein a first end of the second capacitor is connected to the cathode of the second diode, and a second end of the second capacitor is grounded.

In a preferred embodiment of the present application, in the above power supply processing circuit, the first output unit includes:

A second transformer, wherein the second transformer comprises a second primary winding and a second secondary winding, a first end of the second primary winding is connected to a first end of the first sub-winding, a first end of the second primary winding is grounded, and a first end of the second secondary winding is grounded;

a third capacitor, wherein a first end of the third capacitor is connected to a second end of the first sub-winding, a second end of the third capacitor is connected to a second end of the second primary winding, and the third capacitor is used to remove residual magnetic energy on the second primary winding;

a fifth diode, wherein an anode of the fifth diode is connected to the first end of the second secondary winding, a cathode of the fifth diode is connected to the second end of the second secondary winding, and the fifth diode is used to remove residual magnetic energy on the second secondary winding;

a sixth diode, wherein an anode of the sixth diode is connected to the second end of the second secondary winding, and the sixth diode is used to rectify an output of the second secondary winding;

a fourth capacitor, wherein a first end of the fourth capacitor is connected to a cathode of the sixth diode, a second end of the fourth capacitor is connected to a second end of the second secondary winding, and the fourth capacitor is used to filter an output of the second secondary winding;

A third resistor, wherein a first end of the third resistor is connected to the cathode of the sixth diode, a second end of the third resistor is connected to the second end of the second secondary winding, the third resistor is used to stabilize the output voltage of the first output unit, and a first end and a second end of the third resistor are connected to the first first power supply output port.

In a preferred embodiment of the present application, in the above power supply processing circuit, the second output unit includes:

a seventh diode, wherein an anode of the seventh diode is connected to the first end of the second sub-winding, and a second end of the second sub-winding is grounded;

a fifth capacitor, wherein a first end of the fifth capacitor is connected to a first end of the second sub-winding;

a fourth resistor, wherein a first end of the fourth resistor is connected to a second end of the fifth capacitor, and a second end of the fourth resistor is connected to a cathode of the seventh diode;

a sixth capacitor, wherein a first end of the sixth capacitor is connected to a cathode of the seventh diode, and a second end of the sixth capacitor is connected to a second end of the second sub-winding;

a seventh capacitor, wherein a first end of the seventh capacitor is connected to the cathode of the seventh diode, and a second end of the seventh capacitor is connected to the second end of the second sub-winding;

A fifth resistor, wherein a first end of the fifth resistor is connected to the cathode of the seventh diode, a second end of the fifth resistor is connected to the second end of the second sub-winding, and a first end and a second end of the fifth resistor are connected to the second first power supply output port.

In a preferred embodiment of the present application, in the above power supply processing circuit, the second power supply processing module includes:

a second power control unit, wherein an input end of the second power control unit is connected to the second power supply input port, and the second power control unit is at least used to perform a third voltage adjustment process on the direct current provided by the second power supply input port, and output the corresponding direct current;

a third output unit, wherein the input end of the third output unit is connected to the output end of the second power control unit, and the output end of the third output unit is connected to the first second power supply output port, and the third output unit is at least used to stabilize the direct current output by the second power control unit, and output the corresponding direct current to the first second power supply output port, so as to drive the connected relay through the first second power supply output port, and the relay is used as a second electrical device;

A fourth output unit, wherein the input end of the fourth output unit is connected to the output end of the second power control unit, and the output end of the fourth output unit is connected to the second second power supply output port, and the fourth output unit is at least used to stabilize the direct current output by the second power control unit and output the corresponding direct current to the second second power supply output port, so as to power the connected heat dissipation fan through the second second power supply output port, and the heat dissipation fan serves as a second electrical device.

The present application also provides an electronic device, including:

The power supply processing circuit mentioned above;

At least two electrical devices, wherein the at least two electrical devices are connected to at least two power output ports included in the power supply processing circuit, and the power supply processing circuit is used to supply power to the at least two electrical devices through the at least two power output ports.

The power supply processing circuit and electronic device provided in the present application include a first power supply processing module and a second power supply processing module, wherein the first power supply processing module includes a first power supply input port, a first power supply processing submodule and at least one first power supply output port, and the first power supply processing submodule is used to process the alternating current provided by the alternating current power supply, and provide the processed output direct current to the first electrical device. The second power supply processing module includes a second power supply input port, a second power supply processing submodule and at least one second power supply output port, and the second power supply processing submodule is used to process the direct current provided by the direct current power supply, and provide the processed output direct current to the second electrical device. Based on the above content, since the external alternating current power supply and the internal direct current power supply can be used to power different electrical devices through the first power supply processing module and the second power supply processing module, respectively, composite power supply and dedicated power supply are realized, so that the overall reliability of the power supply can be higher, and therefore, the problem of low power supply reliability existing in the prior art can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings.

FIG1 is a structural block diagram of an electronic device provided in an embodiment of the present application.

FIG. 2 is an application schematic diagram of a power supply processing circuit provided in an embodiment of the present application.

FIG3 is a circuit diagram of a front-stage rectifying unit provided in an embodiment of the present application.

FIG4 is a circuit diagram of a first power control unit provided in an embodiment of the present application.

FIG. 5 is another circuit schematic diagram of the first power control unit provided in an embodiment of the present application.

FIG6 is a circuit diagram of a soft start component provided in an embodiment of the present application.

FIG. 7 is a circuit diagram of a first output unit provided in an embodiment of the present application.

FIG8 is a circuit schematic diagram of a conventional push-pull circuit provided in an embodiment of the present application.

FIG. 9 is a circuit diagram of a second output unit provided in an embodiment of the present application.

Icon: PWM-pulse width modulation chip, Q-field effect transistor, T1-first transformer, L1-first sub-winding, L2-second sub-winding, L3-third sub-winding, Rq-driving resistor, Rj-grounding resistor, D1-first diode, C1-first capacitor, R1-first resistor, U1-voltage reference chip, U2-optocoupler unit, D2-second diode, D3-third diode, D4-fourth diode, R2-second resistor, C2-second capacitor, T2-second transformer, C3-third capacitor, D5-fifth diode, D6-sixth diode, C4-fourth capacitor, R3-third resistor, D7-seventh diode, C5-fifth capacitor, R4-fourth resistor, C6-sixth capacitor, C7-seventh capacitor, R5-fifth resistor.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

As shown in Fig. 1, an embodiment of the present application provides an electronic device, wherein the electronic device may include a power supply processing circuit and at least two power-consuming devices.

In detail, the at least two electrical devices are connected to at least two power output ports included in the power supply processing circuit, and the power supply processing circuit is used to supply power to the at least two electrical devices through the at least two power output ports. For example, the first power output port is connected to the first electrical device, and the second power output port is connected to the second electrical device.

It can be understood that the structure shown in Figure 1 is only for illustration, and the electronic device may also include more or fewer devices than those shown in Figure 1. For example, the electronic device may also include a communication unit for exchanging information with other devices (such as for receiving radio frequency signals, etc.).

It can be understood that the specific type of the electronic device is not limited. Exemplarily, the electronic device can be an active filter or a frequency converter, etc.

In conjunction with Fig. 2, the embodiment of the present application further provides a power supply processing circuit applicable to the above electronic device, wherein the power supply processing circuit may include a first power supply processing module and a second power supply processing module.

In detail, the first power supply processing module may include a first power supply input port, a first power supply processing submodule and at least one first power supply output port. Furthermore, after the first power supply input port is connected to an AC power source and the at least one first power supply output port is connected to a first electrical device, the first power supply processing submodule is used to process the AC power provided by the AC power source (including but not limited to rectification processing) and provide the processed output DC power to the first electrical device. The AC power source is an external power supply of the electronic device to which the power supply processing circuit is applied, that is, power can be directly taken from the outside to improve the power supply reliability of the first electrical device.

In detail, the second power supply processing module may include a second power supply input port, a second power supply processing submodule and at least one second power supply output port. Furthermore, after the second power supply input port is connected to a DC power supply and the at least one second power supply output port is connected to a second electrical device, the second power supply processing submodule is used to process the DC power provided by the DC power supply and provide the processed output DC power to the second electrical device. The DC power supply belongs to the internal power supply of the electronic device to which the power supply processing circuit is applied, that is, power can also be taken from the inside of the electronic device. For example, the electronic device may also include a circuit mainboard, and a rectifier circuit is configured on the circuit mainboard for converting external AC power to DC power. In this way, part of the circuit of the electronic device can be directly used, so that the cost can be relatively reduced.

Based on the above content, since the first power supply processing module and the second power supply processing module can respectively utilize the external AC power supply and the internal DC power supply to power different electrical devices, composite power supply and dedicated power supply are realized, so that the overall reliability of power supply can be higher. Therefore, the problem of low power supply reliability in the prior art can be improved.

In a first aspect, it should be noted that the specific structure of the first power supply processing module is not limited and can be selected according to actual needs.

For example, in an alternative embodiment, in order to enable the first power supply processing module to reliably power and drive important edge-gate bipolar transistors and central processing units in the electronic device, the first power supply processing module includes a first power supply processing submodule that may include a pre-stage rectifier unit, a first power supply control unit, a first output unit, and a second output unit.

In detail, the input end of the front-stage rectifier unit is connected to the first power supply input port, and the front-stage rectifier unit is at least used to rectify the alternating current input through the first power supply input port and output the corresponding direct current. Exemplarily, the specific structure of the front-stage rectifier unit can be shown in Figure 3 (including varistor Ry, fuse F, capacitor Ca, capacitor Cb, capacitor Cc, capacitor Cd, capacitor Ce, thermistor Rf, common mode inductor L, rectifier bridge Dz, etc.). In addition, the input end of the front-stage rectifier unit can take any two phases of 380V of three-phase alternating current through the first power supply input port, and through rectification, it can output 540V direct current.

In detail, the input end of the first power control unit is connected to the output end of the front-stage rectifier unit, and the first power control unit is at least used to perform a first voltage adjustment process on the direct current (such as the aforementioned 540V) output by the front-stage rectifier unit and output the corresponding direct current.

In detail, the input end of the first output unit is connected to the output end of the first power control unit, and the output end of the first output unit is connected to the first first power supply output port. The first output unit is at least used to perform a second voltage adjustment process on the direct current output by the first power control unit, and output the corresponding direct current to the first first power supply output port, so as to drive the connected insulated gate bipolar transistor through the first first power supply output port, and the insulated gate bipolar transistor is used as a first electrical device.

In detail, the input end of the second output unit is connected to the output end of the first power control unit, and the output end of the second output unit is connected to the second first power supply output port. The second output unit is at least used to stabilize the direct current output by the first power control unit and output the corresponding direct current to the second first power supply output port, so as to power the connected central processing unit through the second first power supply output port. The central processing unit serves as a first electrical device.

It is understandable that the specific structure of the first power control unit is not limited and can be selected according to actual needs.

For example, in an alternative embodiment, in order to ensure that the first power control unit has higher safety during operation and can provide reliable drive for the insulated gate bipolar transistor, in combination with Figure 4, the first power control unit may include a pulse width modulation chip PWM, a field effect transistor Q, a first transformer T1 and a clamping sub-unit.

In detail, the pulse width modulation chip PWM may include a first power pin (HV pin as shown in FIG4 ) and a second power pin (VCC pin as shown in FIG4 ). The first power pin is connected to the output end of the front-stage rectifier unit (for example, in some embodiments, some resistors may be connected in series between the first power pin and the output end of the front-stage rectifier unit, and the connection position between these resistors may be grounded through other resistors to achieve voltage and current protection of the first power pin and ensure the safe operation of the pulse width modulation chip PWM), the pulse width modulation chip PWM performs initial startup work through the power supply of the front-stage rectifier unit to output a pulse width modulation signal (for example, the pulse width modulation signal may be a square wave with a certain duty cycle), and disconnects the power supply of the front-stage rectifier unit after outputting the pulse width modulation signal.

In detail, the gate of the field effect transistor Q is connected to the output end of the pulse width modulation chip PWM (exemplarily, in some embodiments, a driving resistor Rq may be connected in series between the gate of the field effect transistor Q and the output end of the pulse width modulation chip PWM, which may be used to control the wave transmission rate of the pulse width modulation chip PWM), so as to control the high potential end and the low potential end of the field effect transistor Q to be alternately (or periodically) turned on or off based on the pulse width modulation signal output by the pulse width modulation chip PWM, one of the drain of the field effect transistor Q and the source of the field effect transistor Q is used as the high potential end and the other is used as the low potential end (the specific situation may be determined according to the type of the field effect transistor Q, for example, when the field effect transistor Q is of N type, the drain may be used as the high potential end and the source may be used as the low potential end), and the low potential end is grounded (may be grounded through a grounding resistor Rj, and in addition, in other embodiments, the current flowing through the grounding resistor Rj may be sampled, and when the flowing current reaches a set value, the pulse width modulation chip PWM may start overcurrent protection and stop outputting the pulse width modulation signal).

In detail, the first transformer T1 may include a first primary winding and a first secondary winding, wherein a first end of the first primary winding is connected to the output end of the front-stage rectifying unit, and a second end of the first primary winding is connected to the high potential end of the field effect transistor Q. The first secondary winding includes a first sub-winding L1, a second sub-winding L2, and a third sub-winding L3, wherein the first sub-winding L1 is connected to the first output unit, the second sub-winding L2 is connected to the second output unit, and the third sub-winding L3 is connected to the second power supply pin (exemplarily, in order to protect the pulse width modulation chip PWM, a resistor, a diode, and other devices may be connected in series between the third sub-winding L3 and the second power supply pin, and the second power supply pin may also be grounded through some capacitors, resistors, diodes, and the like), and the third sub-winding L3 is used to supply power to the pulse width modulation chip PWM through the second power supply pin after the power supply of the front-stage rectifying unit is disconnected. Exemplarily, the first transformer T1 may be a flyback transformer, which is used to output a corresponding low-voltage direct current at the first secondary winding, such as 5V, 18V, 24V, 38V, etc. Furthermore, the first transformer T1 may be a PCB planar transformer, so as to reduce the height and volume of the transformer. For example, it may be formed by stacking and welding multiple layers of PCB boards, and the copper wire winding of the traditional transformer may be replaced by PCB wiring, so as to reduce the volume, especially the height, of the transformer, reduce the loss of the transformer, and effectively reduce the heat generated by the transformer, while reducing the cost.

In detail, the first end of the clamping subunit is connected to the high potential end of the field effect transistor Q, and the second end of the clamping subunit is connected to the output end of the front-stage rectifier unit. The clamping subunit is used to absorb the impact voltage generated when the field effect transistor Q is turned on, so that the first transformer T1 can be prevented from being damaged by voltage impact.

It is understandable that, in an alternative implementation, in order to ensure that the clamping subunit has a better voltage clamping effect, the clamping subunit may include a first diode D1, a first capacitor C1 and a first resistor R1.

In detail, the anode of the first diode D1 is connected to the high potential end of the field effect transistor Q. The first end of the first capacitor C1 is connected to the pin of the first diode D1, and the second end of the first capacitor C1 is connected to the output end of the front-stage rectifying unit. The first end of the first resistor R1 is connected to the pin of the first diode D1, and the second end of the first resistor R1 is connected to the output end of the front-stage rectifying unit.

It is understandable that, in an alternative implementation, in order to enable the pulse width modulation chip PWM to control the output stable voltage of the first secondary winding of the first transformer T1, in combination with Figure 5, the first power control unit may further include a voltage feedback regulation subunit. The voltage feedback regulation subunit may include a voltage reference chip U1 and an optical coupling unit U2.

In detail, the input end of the voltage reference chip U1 is connected to the second sub-winding L2, and the voltage reference chip U1 is used to collect the voltage output by the second sub-winding L2. The input end of the optical coupling unit U2 is connected to the output end of the voltage reference chip U1, and the output end of the optical coupling unit U2 is connected to the voltage feedback pin of the pulse width modulation chip PWM, and the optical coupling unit U2 is used to feed back the voltage change output by the second sub-winding L2 to the pulse width modulation chip PWM through the voltage feedback pin, so that the pulse width modulation chip PWM adjusts the duty cycle of the output pulse width modulation signal based on the voltage change to output a stable voltage.

Exemplarily, the model of the voltage reference chip U1 may be TL431, etc., which is an adjustable three-terminal regulator and voltage reference source chip. The model of the optocoupler unit U2 may be 816D, etc. Based on this, in order to enable the voltage feedback regulation subunit to have a reliable voltage feedback capability, in the voltage feedback regulation subunit, one end of the primary side of the optocoupler unit U2 (such as the anode of a diode) may be connected to the second sub-winding L2 through a resistor (such as R11 in FIG. 5, so that the input current can be limited, so that the optocoupler unit U2 can be current protected), and the other end may be connected to the output pin of the voltage reference chip U1 (such as the cathode of a diode), the input pin of the voltage reference chip U1 (such as the anode of a diode) is grounded, and the control pin of the voltage reference chip U1 is grounded. The pin can be connected to the second sub-winding L2 through a resistor (such as R12 in FIG5 ), and grounded through another resistor (such as R13 in FIG5 , so that the reference potential of the voltage reference chip U1 can be adjusted and the input voltage can be stabilized by the coordinated setting of the resistor R12 and the resistor R13), and a resistor (such as R14 in FIG5 ) and a capacitor (such as C11 in FIG5 , so that the feedback can be adjusted by the coordinated setting of the resistor R14 and the capacitor C11, and the rate and accuracy can be controlled accordingly) can be connected in series between the output pin and the control pin of the voltage reference chip U1. In addition, one end of the secondary side of the optical coupling unit U2 (such as the emitter of the N-type transistor) can be connected to the voltage feedback pin of the width modulation chip, and the other end (such as the collector of the N-type transistor) can be grounded, and the voltage feedback pin of the width modulation chip can also be grounded through a capacitor (such as C12 in FIG5 ).

Based on this, when the voltage output by the second sub-winding L2 changes, the current on the primary side of the optocoupler unit U2 changes, causing the current on the secondary side of the optocoupler unit U2 to also change, and the voltage input from the secondary side of the optocoupler unit U2 to the voltage feedback pin also changes, so that the pulse width modulation chip PWM adjusts the duty cycle of the output pulse width modulation signal (such as a square wave) based on the voltage change to output a stable voltage.

It is understandable that, in an alternative implementation, in order to ensure that the voltage value of the voltage feedback pin can reach the pulsation threshold when powered on for the first time so that the pulse width modulation chip PWM can be turned on normally, the voltage feedback regulation subunit may also include a soft start component.

Among them, the soft start component is used to make the voltage value of the voltage feedback pin of the pulse width modulation chip PWM reach the wave threshold when the pulse width modulation chip PWM performs initial startup work through the power supply of the front-stage rectifier unit, so that the pulse width modulation chip PWM can output a pulse width modulation signal.

In detail, in conjunction with FIG6, the soft start component may include a second diode D2, a third diode D3, a fourth diode D4, a second resistor R2 and a second capacitor C2. The anode of the second diode D2 is connected to the voltage feedback pin (COMP pin as shown in FIG4) of the pulse width modulation chip PWM. The anode of the third diode D3 is connected to the cathode of the second diode D2, and the cathode of the third diode D3 is connected to the second power supply pin. The anode of the fourth diode D4 is grounded, and the cathode of the fourth diode D4 is connected to the cathode of the second diode D2. The first end of the second resistor R2 is connected to the cathode of the second diode D2, and the second end of the second resistor R2 is connected to the second power supply pin. The first end of the second capacitor C2 is connected to the cathode of the second diode D2, and the second end of the second capacitor C2 is grounded. The configuration of the second resistor R2 can limit the current of the voltage feedback pin of the pulse width modulation chip PWM to achieve corresponding current protection. Furthermore, by configuring the fourth diode D4, when the pulse width modulation chip PWM emits the first wave, the actual voltage of the voltage feedback pin can be maintained not lower than the effective working threshold voltage of the voltage feedback pin. Exemplarily, the effective working threshold voltage can be 2V.

It can be understood that, in an alternative embodiment, in order to effectively drive the insulated gate bipolar transistor through the first output unit, in combination with Figure 7, the first output unit may include a second transformer T2, a third capacitor C3, a fifth diode D5, a sixth diode D6, a fourth capacitor C4 and a third resistor R3.

In detail, the second transformer T2 includes a second primary winding and a second secondary winding, wherein the first end of the second primary winding is connected to the first end of the first sub-winding L1, and the first end of the second primary winding is grounded, and the first end of the second secondary winding is grounded. The first end of the third capacitor C3 is connected to the second end of the first sub-winding L1, and the second end of the third capacitor C3 is connected to the second end of the second primary winding, and the third capacitor C3 is used to remove the residual magnetic energy on the second primary winding. The anode of the fifth diode D5 is connected to the first end of the second secondary winding, and the cathode of the fifth diode D5 is connected to the second end of the second secondary winding, and the fifth diode D5 is used to remove the residual magnetic energy on the second secondary winding. The anode of the sixth diode D6 is connected to the second end of the second secondary winding, and the sixth diode D6 is used to rectify the output of the second secondary winding. The first end of the fourth capacitor C4 is connected to the cathode of the sixth diode D6, and the second end of the fourth capacitor C4 is connected to the second end of the second secondary winding, and the fourth capacitor C4 is used to filter the output of the second secondary winding. The first end of the third resistor R3 is connected to the cathode of the sixth diode D6, the second end of the third resistor R3 is connected to the second end of the second secondary winding, the third resistor R3 is used to stabilize the output voltage of the first output unit, and the first end and the second end of the third resistor R3 are connected to the first first power supply output port.

Based on this, the pulse width modulation chip PWM sends out a pulse width modulation signal to drive the field effect transistor Q to open and close periodically, and the pulse width modulation signal sent by the pulse width modulation chip PWM is sensed to the secondary winding of the first transformer T1 through the first transformer T1 (flyback type). After the pulse width modulation signal comes out of the secondary winding of the first transformer T1, it is boosted and amplified by the second transformer T2 (forward type), and a driving level sufficient to drive the insulated gate bipolar transistor is obtained in the secondary winding of the second transformer T2. When the pulse width modulation signal is high, the field effect transistor Q outputs a high level, the primary winding of the first transformer T1 outputs a high level, and the secondary winding of the first transformer T1 senses a low level, which is amplified by the second transformer T2 to obtain a low level that controls the insulated gate bipolar transistor to turn off; vice versa, thereby achieving the driving effect of controlling the insulated gate bipolar transistor to turn on or off. In this way, a pulse width modulation signal can be sent to drive the insulated gate bipolar transistor, eliminating the push-pull circuit used in traditional driving and saving costs.

Among them, a conventional push-pull circuit is shown in Figure 8. The conventional drive push-pull is built with two transistor pairs, such as NPN and PNP, powered by an auxiliary power supply (such as 12V), and a control signal (such as Vin) is provided by a pulse width modulation signal generating circuit. By controlling the periodic sequential conduction of the transistor pair, a signal (such as Vout) that can drive the insulated gate bipolar transistor is output. This circuit not only requires a complete auxiliary power supply, but also a separate pulse width modulation signal generating circuit. At the same time, the driving capability of the circuit is limited. If the driving load is heavy, the current of the transistor is too large, the device heats up and reduces the driving efficiency, and it is easy to damage the device.

It can be understood that, in an alternative embodiment, in order to provide stable power supply to the central processing unit, in combination with Figure 9, the second output unit may include a seventh diode D7, a fifth capacitor C5, a fourth resistor R4, a sixth capacitor C6, a seventh capacitor C7 and a fifth resistor R5.

In detail, the anode of the seventh diode D7 is connected to the first end of the second sub-winding L2, and the second end of the second sub-winding L2 is grounded. The first end of the fifth capacitor C5 is connected to the first end of the second sub-winding L2. The first end of the fourth resistor R4 is connected to the second end of the fifth capacitor C5, and the second end of the fourth resistor R4 is connected to the cathode of the seventh diode D7. The first end of the sixth capacitor C6 is connected to the cathode of the seventh diode D7, and the second end of the sixth capacitor C6 is connected to the second end of the second sub-winding L2. The first end of the seventh capacitor C7 is connected to the cathode of the seventh diode D7, and the second end of the seventh capacitor C7 is connected to the second end of the second sub-winding L2. The first end of the fifth resistor R5 is connected to the cathode of the seventh diode D7, and the second end of the fifth resistor R5 is connected to the second end of the second sub-winding L2, and the first end and the second end of the fifth resistor R5 are connected to the second first power supply output port.

In the second aspect, it should be noted that the specific structure of the second power supply processing module is not limited and can be selected according to actual needs.

For example, in an alternative implementation, the second power supply processing module may include a second power control unit, a third output unit, and a fourth output unit.

In detail, the input end of the second power control unit is connected to the second power input port, and the second power control unit is at least used to perform a third voltage adjustment process on the direct current provided by the second power input port, and output the corresponding direct current. The input end of the third output unit is connected to the output end of the second power control unit, and the output end of the third output unit is connected to the first second power output port. The third output unit is at least used to perform voltage stabilization process on the direct current output by the second power control unit, and output the corresponding direct current to the first second power output port, so as to drive the connected relay through the first second power output port, and the relay is a second electrical device. The input end of the fourth output unit is connected to the output end of the second power control unit, and the output end of the fourth output unit is connected to the second second power output port. The fourth output unit is at least used to perform voltage stabilization process on the direct current output by the second power control unit, and output the corresponding direct current to the second second power output port, so as to power the connected heat dissipation fan through the second second power output port, and the heat dissipation fan is a second electrical device.

It can be understood that the specific structure of the third output unit and the fourth output unit is not limited. For example, the structure of the third output unit and the fourth output unit can be the same, such as the same or similar to the structure of the second output unit mentioned above, or, based on other needs, adaptive adjustments can be made, that is, the structure can be different from the structure of the second output unit mentioned above.

In summary, the power supply processing circuit and electronic device provided in the present application include a first power supply processing module and a second power supply processing module, wherein the first power supply processing module includes a first power supply input port, a first power supply processing submodule and at least one first power supply output port, and the first power supply processing submodule is used to process the alternating current provided by the alternating current power supply, and provide the processed output direct current to the first electrical device. The second power supply processing module includes a second power supply input port, a second power supply processing submodule and at least one second power supply output port, and the second power supply processing submodule is used to process the direct current provided by the direct current power supply, and provide the processed output direct current to the second electrical device. Based on the above content, since the external alternating current power supply and the internal direct current power supply can be used by the first power supply processing module and the second power supply processing module respectively to power different electrical devices, composite power supply and dedicated power supply are realized, so that the overall reliability of the power supply can be higher, and therefore, the problem of low power supply reliability existing in the prior art can be improved.

The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A power supply processing circuit, comprising:

The first power supply processing module comprises a first power supply input port, a first power supply processing sub-module and at least one first power supply output port, wherein after the first power supply input port is connected with an alternating current power supply and the at least one first power supply output port is connected with a first electric device, the first power supply processing sub-module is used for processing alternating current provided by the alternating current power supply and providing direct current output by processing for the first electric device, and the alternating current power supply belongs to an external power supply of electronic equipment applied by the power supply processing circuit;

The second power supply processing module comprises a second power supply input port, a second power supply processing sub-module and at least one second power supply output port, wherein after the second power supply input port is connected with a direct current power supply and the at least one second power supply output port is connected with a second electric appliance, the second power supply processing sub-module is used for processing direct current provided by the direct current power supply and providing the processed and output direct current for the second electric appliance, and the direct current power supply belongs to an internal power supply of electronic equipment applied by the power supply processing circuit.

2. The power supply processing circuit of claim 1, wherein the first power supply processing submodule comprises:

The input end of the front-stage rectifying unit is connected with the first power supply input port, and the front-stage rectifying unit is at least used for rectifying alternating current input through the first power supply input port and outputting corresponding direct current;

The first power supply control unit is at least used for performing first voltage adjustment processing on the direct current output by the front-stage rectifying unit and outputting corresponding direct current;

The first output unit is at least used for carrying out second voltage adjustment processing on the direct current output by the first power supply control unit and outputting corresponding direct current to the first power supply output port so as to drive the connected insulated gate bipolar transistor through the first power supply output port, and the insulated gate bipolar transistor is used as a first electric device;

The input end of the second output unit is connected with the output end of the first power supply control unit, the output end of the second output unit is connected with a second first power supply output port, and the second output unit is at least used for performing voltage stabilization processing on direct current output by the first power supply control unit and outputting corresponding direct current to the second first power supply output port so as to supply power to a connected central processor through the second first power supply output port, and the central processor is used as a first electric device.

3. The power supply processing circuit according to claim 2, wherein the first power supply control unit includes:

The pulse width modulation chip comprises a first power pin and a second power pin, the first power pin is connected with the output end of the front-stage rectifying unit, the pulse width modulation chip performs initial starting work through power supply of the front-stage rectifying unit to output a pulse width modulation signal, and the power supply of the front-stage rectifying unit is disconnected after the pulse width modulation signal is output;

A field effect transistor, wherein a gate of the field effect transistor is connected with an output end of the pulse width modulation chip to control a high potential end of the field effect transistor and a low potential end of the field effect transistor to be alternately turned on or off based on a pulse width modulation signal output by the pulse width modulation chip, one of a drain of the field effect transistor and a source of the field effect transistor is used as a high potential end, the other is used as a low potential end, and the low potential end is grounded;

The first transformer comprises a first primary winding and a first secondary winding, a first end of the first primary winding is connected with the output end of the pre-stage rectifying unit, a second end of the first primary winding is connected with the high potential end of the field effect transistor, the first secondary winding comprises a first sub-winding, a second sub-winding and a third sub-winding, the first sub-winding is connected with the first output unit, the second sub-winding is connected with the second output unit, the third sub-winding is connected with the second power pin, and the third sub-winding is used for supplying power to the pulse width modulation chip through the second power pin after the power supply of the pre-stage rectifying unit is disconnected;

A clamping subunit, wherein a first end of the clamping subunit is connected with a high-potential end of the field effect transistor, the second end of the clamping subunit is connected with the output end of the front-stage rectifying unit, and the clamping subunit is used for absorbing impulse voltage generated when the field effect transistor is conducted.

4. The power supply processing circuit of claim 3, wherein the clamp subunit comprises:

the anode of the first diode is connected with the high potential end of the field effect transistor;

The first end of the first capacitor is connected with the pin of the first diode, and the second end of the first capacitor is connected with the output end of the front-stage rectifying unit;

a first resistor, wherein a first end of the first resistor is connected with a pin of the first diode, the second end of the first resistor is connected with the output end of the front-stage rectifying unit.

5. The power supply processing circuit of claim 3, wherein the first power supply control unit further comprises a voltage feedback regulation subunit comprising:

The input end of the voltage reference chip is connected with the second sub-winding, and the voltage reference chip is used for collecting the voltage output by the second sub-winding;

The input end of the optical coupling unit is connected with the output end of the voltage reference chip, the output end of the optical coupling unit is connected with the voltage feedback pin of the pulse width modulation chip, and the optical coupling unit is used for feeding back the voltage change output by the second sub-winding to the pulse width modulation chip through the voltage feedback pin, so that the pulse width modulation chip adjusts the duty ratio of an output pulse width modulation signal based on the voltage change to output stable voltage.

6. The power supply processing circuit according to claim 5, wherein the voltage feedback adjustment subunit further comprises a soft start component, the soft start component is configured to make a voltage value of a voltage feedback pin of the pulse width modulation chip reach a ripple threshold value when the pulse width modulation chip performs an initial start operation by supplying power to the pre-stage rectification unit, so that the pulse width modulation chip outputs a pulse width modulation signal, and the soft start component includes:

The anode of the second diode is connected with a voltage feedback pin of the pulse width modulation chip;

The anode of the third diode is connected with the cathode of the second diode, and the cathode of the third diode is connected with the second power supply pin;

A fourth diode, wherein the anode of the fourth diode is grounded, and the cathode of the fourth diode is connected with the cathode of the second diode;

The first end of the second resistor is connected with the cathode of the second diode, and the second end of the second resistor is connected with the second power supply pin;

And the first end of the second capacitor is connected with the cathode of the second diode, and the second end of the second capacitor is grounded.

7. A power supply processing circuit according to claim 3, wherein the first output unit comprises:

the second transformer comprises a second primary winding and a second secondary winding, wherein a first end of the second primary winding is connected with a first end of the first sub-winding, a first end of the second primary winding is grounded, and a first end of the second secondary winding is grounded;

a third capacitor, wherein a first end of the third capacitor is connected with a second end of the first sub-winding, a second end of the third capacitor is connected with a second end of the second primary winding, and the third capacitor is used for removing residual magnetic energy on the second primary winding;

a fifth diode, wherein an anode of the fifth diode is connected with a first end of the second secondary winding, a cathode of the fifth diode is connected with a second end of the second secondary winding, and the fifth diode is used for removing residual magnetic energy on the second secondary winding;

A sixth diode, wherein an anode of the sixth diode is connected with a second end of the second secondary winding, and the sixth diode is used for rectifying the output of the second secondary winding;

A fourth capacitor, wherein a first end of the fourth capacitor is connected with the cathode of the sixth diode, a second end of the fourth capacitor is connected with the second end of the second secondary winding, and the fourth capacitor is used for filtering the output of the second secondary winding;

A third resistor, wherein a first end of the third resistor is connected with the cathode of the sixth diode, a second end of the third resistor is connected with a second end of the second secondary winding, the third resistor is used for stabilizing the output voltage of the first output unit, and the first end and the second end of the third resistor are connected with the first power supply output port.

8. A power supply processing circuit according to claim 3, wherein the second output unit comprises:

A seventh diode, wherein an anode of the seventh diode is connected with the first end of the second sub-winding, and a second end of the second sub-winding is grounded;

A fifth capacitor, wherein a first end of the fifth capacitor is connected with a first end of the second sub-winding;

A fourth resistor, wherein a first end of the fourth resistor is connected with a second end of the fifth capacitor, and a second end of the fourth resistor is connected with a cathode of the seventh diode;

a sixth capacitor, wherein a first end of the sixth capacitor is connected with the cathode of the seventh diode, and a second end of the sixth capacitor is connected with the second end of the second sub-winding;

A seventh capacitor, wherein a first end of the seventh capacitor is connected with a cathode of the seventh diode, and a second end of the seventh capacitor is connected with a second end of the second sub-winding;

And a fifth resistor, wherein a first end of the fifth resistor is connected with the cathode of the seventh diode, a second end of the fifth resistor is connected with the second end of the second sub-winding, and the first end and the second end of the fifth resistor are connected with the second first power supply output port.

9. The power supply processing circuit of any of claims 1-8, wherein the second power supply processing module comprises:

The input end of the second power supply control unit is connected with the second power supply input port, and the second power supply control unit is at least used for performing third voltage adjustment processing on the direct current provided by the second power supply input port and outputting corresponding direct current;

The input end of the third output unit is connected with the output end of the second power supply control unit, the output end of the third output unit is connected with a first second power supply output port, and the third output unit is at least used for performing voltage stabilization treatment on direct current output by the second power supply control unit and outputting corresponding direct current to the first second power supply output port so as to drive a connected relay through the first second power supply output port, and the relay is used as a second electric device;

And the fourth output unit is at least used for performing voltage stabilization processing on the direct current output by the second power supply control unit and outputting the corresponding direct current to the second power supply output port so as to supply power to the connected heat dissipation fan through the second power supply output port, and the heat dissipation fan is used as a second electric device.

10. An electronic device, comprising:

The power supply processing circuit of any one of claims 1-9;

at least two power utilization devices, wherein the at least two power utilization devices are connected with at least two power supply output ports included in the power supply processing circuit, the power supply processing circuit is used for supplying power to the at least two electric devices through the at least two power supply output ports.