CN114498825A

CN114498825A - Many Type C interface developments supply circuit, device and display device

Info

Publication number: CN114498825A
Application number: CN202210041414.3A
Authority: CN
Inventors: 孔意强; 黎旭; 沈峻
Original assignee: Guangxi Century Innovation Display Electronics Co Ltd
Current assignee: Guangxi Century Innovation Display Electronics Co Ltd
Priority date: 2022-01-14
Filing date: 2022-01-14
Publication date: 2022-05-13

Abstract

A many types C interface developments supply circuit includes: the device comprises N types of C interface circuits, N voltage conversion circuits, N power confirmation circuits and a control circuit, wherein each Type of C interface circuit is used for generating a device access detection signal and a charging confirmation signal when detecting that a powered device is accessed and transmitting the charging signal to the powered device; each voltage conversion circuit is used for adjusting the generated charging signal according to the power adjusting signal; each power confirmation circuit is used for generating a power demand signal according to the charging confirmation signal and generating a power regulation signal according to the power control signal; the control circuit is used for generating M paths of power control signals according to the M paths of equipment access detection signals and/or the M paths of power demand signals, wherein M is more than or equal to 1 and is less than or equal to N, and M, N are positive integers; realize a plurality of Type C interfaces and externally charge to according to the powered device quantity and the required power dynamic high efficiency distribution charging power of powered device of Type C interface access.

Description

Many Type C interface developments supply circuit, device and display device

Technical Field

The application belongs to the technical field of Type C interface charging, and particularly relates to a dynamic power supply circuit, device and display equipment with multiple Type C interfaces.

Background

The Type C interface is increasingly becoming a standard interface of various electronic products, such as a display, a mobile phone, a tablet, a notebook computer, a power adapter, and the like, due to its powerful electrical performance specification and use convenience, and the PD charging function is a core parameter in each performance specification of the Type C. Meanwhile, as more and more 'small-size' devices (mobile phones, manual game machines, flat panels and ultrathin notebook lamps) with Type C interfaces are provided, the 'small-size' devices are basically powered devices (receive charging). Then the device that charges to the outside slowly supports only charging to a piece of equipment before, becomes can charge to many pieces of equipment simultaneously, if many charging adapters now support to charge to many pieces of equipment simultaneously, whether USB interface charges, or Type C interface charges.

Currently, the external charging standard of a single pd (type c) interface is 100W (20V/5A), and a charging device is required to simultaneously support external charging of multiple interfaces, so the total power of the charging device is usually designed according to 100W × N, where N is a powered device; taking charging 3 devices as an example, the total power of the charging device is 100W × 3, but this method for setting the total power of the charging device has several obvious disadvantages, the design cost of 300W is very high, the overall occupied space (volume) is very large, and it is also important that not all powered devices need 100W, such as mobile phones, game machines, etc., and these application scenarios also objectively cause 300W waste.

Therefore, the problem that the design cost is high, the electric energy utilization efficiency is poor and the equipment size is large due to the fact that the conventional technical scheme is provided with a plurality of Type C interface devices (which can be charged externally) and the electric energy cannot be dynamically and effectively distributed according to the number of the powered devices accessed by the plurality of Type C interfaces and the required power.

Disclosure of Invention

An object of this application is to provide a many types C interface developments supply circuit, device and display device, aim at solving and have a plurality of types C interface equipment (can externally charge) and can not independently lead to the problem that design cost is high, the electric energy utilization efficiency is poor and equipment is bulky according to the powered device quantity that a plurality of types C interface access and required power developments effective allocation electric energy that exist among the traditional technical scheme.

A first aspect of the embodiments of the present application provides a multiple Type C interface dynamic power supply circuit, including: the circuit comprises N paths of Type C interface circuits, N paths of voltage conversion circuits, N paths of power confirmation circuits and a control circuit;

the N types of the Type C interface circuits are respectively connected with the N voltage conversion circuits in a one-to-one correspondence manner, the N types of the Type C interface circuits are respectively connected with the N power confirmation circuits in a one-to-one correspondence manner, the N types of the voltage conversion circuits are respectively connected with the N power confirmation circuits in a one-to-one correspondence manner, and the N types of the Type C interface circuits and the N types of the power confirmation circuits are both connected with the control circuit;

each Type C interface circuit is used for connecting a powered device, generating a device access detection signal and a charging confirmation signal when detecting that the powered device is accessed, and transmitting a charging signal to the powered device;

each voltage conversion circuit is used for performing voltage conversion on an input power supply signal according to a power regulation signal to generate the charging signal;

each power confirmation circuit is used for generating a power demand signal according to the charging confirmation signal and generating the power regulation signal according to a power control signal;

the control circuit is used for generating corresponding M paths of power control signals according to M paths of equipment access detection signals and/or M paths of power demand signals; wherein M is more than or equal to 1 and less than or equal to N, and M, N are positive integers.

In one embodiment, the multi-Type C interface dynamic power supply circuit further includes:

and the power supply input circuit is connected with the N voltage conversion circuits and is used for providing the input power supply signal.

In one embodiment, the voltage conversion circuit includes: the device comprises a voltage transformation unit and a power extraction detection unit;

the power extraction detection unit is connected with the Type C interface circuit and the transformation unit and is used for generating a power extraction detection signal when the connected powered device is detected to be charged through the charging signal;

the voltage transformation unit is connected with the power confirmation circuit and used for performing voltage conversion on an input power supply signal according to a power regulation signal to generate the charging signal, and generating a power extraction feedback signal according to the power extraction detection signal and transmitting the power extraction feedback signal to the power confirmation circuit;

the power confirmation circuit is further used for generating the power demand signal according to the charging confirmation signal and the power-pumping feedback signal.

In one embodiment, the control circuit is specifically configured to generate M first power control signals according to M device access detection signals to control the even distribution of charging power to the accessed M powered devices.

In one embodiment, the control circuit is specifically configured to determine, according to the M paths of power demand signals, whether a total power of the accessed powered device is greater than a preset total power threshold; and are

When the total power of the powered device is less than or equal to the preset total power threshold, generating corresponding M paths of second power control signals according to M paths of device access detection signals and M paths of power demand signals so as to control the M accessed powered devices to distribute charging power as required; and

and when the total power of the powered device is greater than the preset total power threshold, generating M third power control signals according to M device access detection signals so as to control the average distribution of charging power to the accessed M powered devices.

In one embodiment, the Type C interface circuit includes: the device comprises a Type C connector, a first capacitor, a first resistor and a second resistor; the interface power end of the Type C connector is connected with the first end of the first capacitor and the voltage conversion circuit, the first confirmation signal end of the Type C connector and the second confirmation signal end of the Type C connector are connected with the power confirmation circuit, the power ground end of the Type C connector is connected with the first end of the first resistor, the first end of the second resistor and the control circuit, the second end of the first resistor is connected with the power ground, the second end of the second resistor is a first voltage signal input end, and the equipment ground end of the Type C connector is connected with the power ground.

In one embodiment, the power validation circuit comprises: the PD controller, the second capacitor, the third resistor, the fourth resistor and the fifth resistor; wherein a power end of the PD controller is connected to a first end of the second capacitor and a first end of the third resistor, a power end of the PD controller is connected to a second voltage signal, a second end of the second capacitor is connected to a power ground, a second end of the third resistor is connected to a third voltage signal, a reset end of the PD controller is connected to a first end of the third capacitor, a second end of the third capacitor is connected to the power ground, a ground end of the PD controller is connected to the power ground, a voltage stabilizing output end of the PD controller is connected to a first end of the fifth capacitor, a reference voltage output end of the PD controller is connected to a first end of the fourth capacitor, a second end of the fourth capacitor and a second end of the fifth capacitor are connected to the power ground, and a first connection confirmation signal end of the PD controller is connected to a first end of the fourth resistor, a second connection confirmation signal end of the PD controller is connected to a first end of the fifth resistor, a second end of the fourth resistor and a second end of the fifth resistor are connected to the Type C interface circuit, a bus clock end of the PD controller and a bus data end of the PD controller are connected to the control circuit, and a first data end of the PD controller, a pulse width modulation signal end of the PD controller, and a second data end of the PD controller are connected to the voltage conversion circuit.

In one embodiment, the control circuit comprises: the main control chip, the sixth resistor and the seventh resistor; the first bus clock end of the main control chip is connected with the first end of the sixth resistor, the first bus data end of the main control chip is connected with the first end of the seventh resistor, the second end of the sixth resistor and the second end of the seventh resistor are connected with the power confirmation circuit, and the first data input/output end of the main control chip is connected with the Type C interface circuit.

A second aspect of the embodiments of the present application provides a multiple Type C interface dynamic power supply device, where the multiple Type C interface dynamic power supply device includes the multiple Type C interface dynamic power supply circuit described in any one of the above items.

A third aspect of embodiments of the present application provides a display device, where the display device includes the multiple Type C interface dynamic power supply circuit described in any one of the above or the multiple Type C interface dynamic power supply apparatus described above.

The multi-Type C interface dynamic power supply circuit provided in the embodiment of the present application, through detecting whether a Type C interface in each Type C interface circuit is connected to an external powered device, if connected, a device access detection signal and a charging confirmation signal are generated, each power confirmation circuit generates a power demand signal according to a corresponding charging confirmation signal, a control circuit generates a corresponding M-channel power control signal according to an M-channel device access detection signal and/or an M-channel power demand signal, the power confirmation circuit generates a power adjustment signal according to a corresponding power control signal, so that each voltage conversion circuit performs voltage conversion on an input power signal according to a corresponding power adjustment signal to generate a charging signal, the charging signal is transmitted to a powered device through a corresponding Type C interface to be charged, and the dynamic distribution of electric energy according to the number and required power of external powered devices connected to the Type C interface is realized to charge the connected external powered device The external charging of a plurality of ports is supported simultaneously, so that the user experience is improved, and the application scene of simultaneous charging of a plurality of terminal users is better met; in addition, the total power of the dynamic allocation scheme can be larger than 100W (smaller than 300W), which is beneficial to saving the design cost and the volume of the PD charging device with the Type C interface (for example, a display device supporting Type C to charge external PDs), and improving the multi-port charging efficiency and the charging electric energy utilization rate.

Drawings

Fig. 1 is a schematic structural diagram of a multi-Type C interface dynamic power supply circuit according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a voltage conversion circuit in the multi-Type C interface dynamic power supply circuit shown in fig. 1;

fig. 3 is a schematic structural diagram of a multi-Type C interface dynamic power supply circuit according to an embodiment of the present application;

FIG. 4 is a schematic diagram of an exemplary circuit of a Type C interface circuit in the multi-Type C interface dynamic power supply circuit shown in FIG. 1;

FIG. 5 is a schematic diagram of an exemplary circuit for a power validation circuit in the multi-Type C interface dynamic power supply circuit shown in FIG. 1;

FIG. 6 is an exemplary circuit schematic of a control circuit in the multi-Type C interface dynamic power supply circuit shown in FIG. 1;

fig. 7 is a schematic circuit diagram of an example of a voltage conversion circuit in the multi-Type C interface dynamic power supply circuit shown in fig. 1.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In order to solve the problems that the design cost is high, the utilization efficiency of charging electric energy is poor and the equipment size is large due to the fact that the number of the powered devices and the required power dynamic and effective distribution electric energy which can not be accessed according to the multiple Type C interfaces can not be automatically determined in the conventional equipment (which can be charged externally, namely PD charging equipment) with the multiple Type C interfaces, the application designs a dynamic power supply circuit scheme with the multiple Type C interfaces, which is mainly applied to the display equipment (which can be also used as the display equipment of the PD charging equipment) supporting the Type C to be charged externally, such as a display, a television, an advertising machine and the like, the dynamic power supply circuit with the multiple Type C interfaces is provided, and the external powered devices accessed can be charged with high efficiency according to the number of the external powered devices accessed by the Type C interfaces and the required power dynamic distribution electric energy.

Fig. 1 shows a schematic structural diagram of a multiple Type C interface dynamic power supply circuit provided in an embodiment of the present application, and for convenience of description, only parts related to the embodiment are shown, which are detailed as follows:

a many types C interface developments supply circuit includes: n Type C interface circuits (denoted by 100-1 to 100-N), N voltage conversion circuits (denoted by 200-1 to 200-N), N power confirmation circuits (denoted by 300-1 to 300-N), and a control circuit 400.

The N types of C interface circuits are respectively connected with the N voltage conversion circuits in a one-to-one correspondence manner, the N types of C interface circuits are respectively connected with the N power confirmation circuits in a one-to-one correspondence manner, the N voltage conversion circuits are respectively connected with the N power confirmation circuits in a one-to-one correspondence manner, and the N types of C interface circuits and the N power confirmation circuits are both connected with the control circuit 400;

each Type C interface circuit is used for connecting the powered device, generating a device access detection signal and a charging confirmation signal when detecting that the powered device is accessed, and transmitting the charging signal to the powered device;

each voltage conversion circuit is used for performing voltage conversion on an input power supply signal according to the power regulation signal so as to generate a charging signal;

each path of power confirmation circuit is used for generating a power demand signal according to the charging confirmation signal and generating a power regulation signal according to the power control signal;

the control circuit 400 is configured to generate M corresponding power control signals according to the M access detection signals and/or the M power demand signals; wherein M is more than or equal to 1 and less than or equal to N, and M, N are positive integers.

It should be understood that M devices access detection signals, that is, M devices access detection signals, are generated by corresponding M types of C interface circuits when detecting that a powered device is accessed; similarly, the M power demand signals, that is, M power demand signals, are generated by the corresponding M power confirmation circuits according to the M charging confirmation signals. In a specific implementation, the Type C interface circuit includes a Type C interface, and accesses an external device, for example, an external powered device, through the Type C interface, and when detecting that the external powered device is accessed through the Type C interface circuit, generates a device access detection signal and a charging confirmation signal correspondingly, where the device access detection signal is transmitted to the control circuit 400, and the charging confirmation signal is transmitted to a corresponding power confirmation circuit. The power confirmation circuit generates a power demand signal according to the charging confirmation signal, that is, the power confirmation circuit obtains the charging power required by the powered device through the charging confirmation signal, and feeds back the determined required charging power to the control circuit 400. The control circuit 400 generates a power control signal according to the device access detection signal fed back by each Type C interface circuit and the power demand signal fed back by each power confirmation circuit, and the power confirmation circuit generates a corresponding power adjustment signal according to the power control signal, so that the corresponding voltage conversion circuit performs voltage conversion processing on the input power signal to adjust the generated charging signal, thereby adjusting the charging power for charging the power receiving device accessed by the Type C interface.

This application can realize externally charging through a plurality of Type C interfaces through many Type C interface developments power supply circuit to can charge with the outside powered device of efficient to the inserting according to the quantity of the outside powered device of Type C interface access and the required power dynamic allocation electric energy of powered device.

Optionally, the control circuit 400 includes a microprocessor (i.e., an MCU), where multiple sets of power (voltage/current) value relationship tables are preset and stored in the microprocessor, and then the output is adjusted according to the power required by the actually accessed terminal device (i.e., a powered device), so as to achieve the goal of supplying power to different powered devices accessed by the Type C interface as needed.

Because the powered device that every Type C interface inserts is different, the power size that actually needs is also different, if carry out priority sequencing according to a plurality of powered device's power size, preferentially satisfy high-power powered device, for example when first high-power powered device equals or is greater than the output total power, only first high-power powered device can charge, and the second, third etc. powered device can't charge, etc. in proper order, wait for the first to be filled up, it is also equal to or is greater than the output total power to turn to second powered device, only second high-power powered device can charge, and the third, remaining powered device can't charge such as fourth, this kind of dynamic allocation mechanism, when the powered device of different power all needs to charge, user experience is not good, consequently, need improve.

Optionally, in one embodiment, the control circuit 400 is specifically configured to generate M first power control signals according to the M device access detection signals, so as to control the even distribution of the charging power to the accessed M powered devices.

And this application embodiment is through detecting whether Type C interface in each Type C interface circuit inserts outside powered device, if inserts, then takes into the scope of power distribution consideration, carries out the average distribution of charging power, does not consider whether the powered device who inserts extracts the charging signal, does not also consider whether the powered device who inserts is charging promptly. After the power is averagely distributed to the Type C interfaces accessed to the powered device, the power is not dynamically distributed for the second time, for example, the total power is 90W, the first Type C interface corresponding to the first Type C interface circuit 100-1 is accessed to the powered device, and other Type C interfaces are not accessed to the powered device, so that the external charging power of the first Type C interface is 90W; when the second Type C interface corresponding to the second Type C interface circuit 100-2 also accesses the powered device, the first Type C interface and the second Type C interface are respectively allocated to 45W, if the power actually used by the powered device accessed by the second Type C interface is less than 45W, the excessive power of the second Type C interface is no longer allocated to the first Type C interface for the second time, and other interfaces also access the powered device, and so on. The power average allocation mechanism is better than the user experience, because when a plurality of devices need to be charged simultaneously, the end user is more concerned about whether each device can be charged or not, but that a certain device is charged quickly first, and other devices are vacant to wait for charging; and the scheme of dynamically and evenly distributing the charging power has simple logic judgment, quick response time and less preset and stored power value, and does not need to calculate the power value of each actual powered device for many times.

Specifically, the average power distribution scheme of this embodiment is further specifically described with reference to the following table, taking as an example that the display device serving as the PD charging device includes three Type C interfaces: the Type C1/2/3 represents a first Type C interface, a second Type C interface and a third Type C interface.

In one embodiment, each voltage conversion circuit comprises: the device comprises a voltage transformation unit and a power extraction detection unit; wherein,

the power extraction detection unit is connected with the Type C interface circuit and the voltage transformation unit and is used for generating a power extraction detection signal when detecting that the accessed powered device is charged through a charging signal; the voltage transformation unit is connected with the power confirmation circuit and used for performing voltage conversion on an input power supply signal according to the power regulation signal to generate a charging signal, and generating a power extraction feedback signal according to the power extraction detection signal and transmitting the power extraction feedback signal to the power confirmation circuit; the power confirmation circuit is also used for generating a power demand signal according to the charging confirmation signal and the power extraction feedback signal.

In specific implementation, the power confirmation circuit is further configured to generate a power demand signal according to the power extraction feedback signal and the charging confirmation signal and feed the power demand signal back to the control circuit 400, so that the control circuit 400 generates a corresponding power control signal, and then controls the power confirmation circuit to generate a corresponding power adjustment signal according to the power control signal, so that the corresponding voltage transformation unit performs voltage conversion processing on the input power signal, so as to adjust the generated charging signal, and the charging signal is output through the Type C interface, so that the power receiving device to which the Type C interface is connected is charged.

Referring to fig. 2, the first voltage converting circuit 200-1 is taken as an example for explanation, and the operation principle of the other voltage converting circuits is understood by referring to the operation principle of the first voltage converting circuit 200-1. The first path voltage converting circuit 200-1 includes: a voltage transformation unit 200-1-1 and a pumping detection unit 200-1-2. The power extraction detection unit 200-1-2 is connected with the Type C interface circuit 100-1 and the voltage transformation unit 200-1-1, and is configured to generate a power extraction detection signal when detecting that an accessed powered device is charged by a charging signal; the transformer unit 200-1-1 is connected to the power confirmation circuit 300-1, and configured to perform voltage conversion on an input power signal according to a power adjustment signal to generate a charging signal, and generate a pumping feedback signal according to a pumping detection signal and transmit the pumping feedback signal to the power confirmation circuit 300-1, the power confirmation circuit 300-1 further generates a power demand signal according to the charging confirmation signal and the pumping feedback signal and feeds the power demand signal back to the control circuit 400, so that the control circuit 400 generates a corresponding power control signal according to the power demand signal, and further controls the power confirmation circuit 300-1 to generate a corresponding power adjustment signal according to the power control signal, so that the corresponding transformer unit 200-1-1 performs voltage conversion on the input power signal, and adjusts the generated charging signal, and the charging signal is transmitted to the powered device through the Type C interface circuit, so as to charge the power receiving equipment correspondingly accessed to the Type C interface.

Since the charging power is evenly distributed to the accessed external powered devices according to the number of the external powered devices accessed by the Type C interface, although the power value actually required by each powered device is not calculated for many times, the power distributed by some powered devices is large, the power distributed by some powered devices is small, the charging power cannot be efficiently applied, the waste of charging power is caused, and thus, the fine power distribution is required.

Optionally, in one embodiment, the control circuit 400 is specifically configured to determine, according to the M paths of power demand signals, whether a total power of the accessed powered device is greater than a preset total power threshold; when the total power of the powered equipment is smaller than or equal to a preset total power threshold, generating corresponding M paths of second power control signals according to the M equipment access detection signals and the M paths of power demand signals so as to control the charging power to be distributed to the accessed M paths of powered equipment as required; and when the total power of the powered device is greater than a preset total power threshold value, generating M third power control signals according to the M device access detection signals to control the average distribution of the charging power to the accessed M powered devices.

In specific implementation, the device access detection signal includes corresponding Type C interface information, for example, the corresponding Type C interface is a first Type C interface or a second Type C interface, the power requirement signal includes charging power information required by an external powered device accessed by the corresponding Type C interface, for example, the power required by the powered device accessed by the first Type C interface is 45W or 30W. After receiving the power demand signal from each Type C interface, the control circuit 400 first determines whether the total power of all the accessed powered devices is greater than a preset total power threshold, and if the total power is less than or equal to the preset total power threshold, generates a second power control signal according to the corresponding device access detection signal and the power demand signal, so as to control the corresponding power confirmation circuit to output power adjustment signals in a Pulse Width Modulation (PWM) format with different duty ratios, so that the corresponding voltage conversion circuit performs voltage conversion processing on the input power signal, thereby adjusting the charging signal output to the powered devices, and achieving the purpose of allocating charging power as needed, where the power allocated to each powered device is actually needed by the flashlight device, and there is no power waste.

And if the total power of the powered device accessed by the Type C interface is greater than the preset total power threshold, generating M third power control signals according to the M device access detection signals to control the charging power to be uniformly distributed to the accessed M powered devices, namely, when the total power of the powered device accessed by the Type C interface is judged to be greater than the preset total power threshold, switching to the uniformly distributed charging power to ensure that each powered device can be charged and avoid charging failure of the accessed external powered devices.

Optionally, the first power control signal and the third power control signal are the same control signal or signals of the same control logic, and both of them can control the average power distribution to the powered device accessed to the Type C interface.

Specifically, the present embodiment takes an example that a display device serving as a PD charging device includes three Type C interfaces, and is further specifically described with reference to the following table: the Type C1/2/3 is the first Type C interface, the second Type C interface and the third Type C interface.

Through the dynamic power distribution scheme that becomes more meticulous, the power that every powered device that Type C interface inserts distributed is all actual needs, does not have power waste, and the electric energy utilization is efficient, also need not to reform transform the volume of PD charging equipment (for example display device), and the total power etc. of charging externally is adjusted in the volume of increase display device for example, has practiced thrift the cost.

In one embodiment, referring to fig. 1, the multi-Type C interface dynamic power supply circuit further includes: the power input circuit 001.

A power input circuit 001 connected to the N-way voltage converting circuits (denoted by 200-1 to 200-N) for providing an input power signal.

In one embodiment, the power input circuit 001 includes a battery, and the input power signal is provided by the battery. Optionally, input power supply circuit 001 can also be for the alternating current-direct current converting circuit, and it carries out rectification, vary voltage and steady voltage processing with the alternating current commercial power of input after, obtains input power supply signal to can also provide many Type C interface dynamic power supply circuit's input power supply signal when satisfying display device self power consumption demand, and then establish the basis for the powered device provides the signal of charging.

In one embodiment, referring to fig. 3, the multi-Type C interface dynamic power supply circuit further includes: n anti-static filter circuits (500-1 to 500-N); n paths of anti-static filter circuits (represented by 500-1 to 500-N) are respectively connected with N paths of Type C interface circuits (represented by 100-1 to 100-N) and N paths of power confirmation circuits (represented by 300-1 to 300-N) in a one-to-one correspondence manner; the anti-static filter circuit is used for performing anti-static and filtering noise reduction processing on the charging confirmation signal so as to reduce static noise interference, improve the stability and the precision of whether the detection Type C interface is connected into an external powered device or not and detect and determine the required power of the powered device, and improve the stability and the reliability of external charging of the display device. In specific implementation, the anti-static filter circuit can be mainly composed of a triode and a resistor capacitor.

In one embodiment, referring to fig. 4, the Type C interface circuit includes: the circuit comprises a Type C connector U1, a first capacitor C1, a first resistor R1 and a second resistor R2; the interface power source terminal VBUS of the Type C connector U1 is connected to the first terminal of the first capacitor C1 and the voltage conversion circuit, the first confirmation signal terminal CC1 of the Type C connector U1 and the second confirmation signal terminal CC2 of the Type C connector U1 are connected to the power confirmation circuit, the power ground terminal GND1 of the Type C connector U1 is connected to the first terminal of the first resistor R1, the first terminal of the second resistor R2 and the control circuit 400, the second terminal of the first resistor R1 is connected to the power ground, the second terminal of the second resistor R2 is a first voltage signal input terminal, and the device ground terminal GND _ Pad of the Type C connector U1 is connected to the power ground.

In specific implementation, the circuit composition and structure of the N types of C interface circuits may be the same, and are all the circuit compositions and mechanisms shown in fig. 4, and each Type of C interface circuit is connected to the corresponding voltage conversion circuit and the power confirmation circuit. Taking the Type C interface circuit shown in fig. 4 as the first path as an example, the Type C interface circuit is connected to the corresponding first path of voltage converting circuit 200-1 and the first path of power confirming circuit 300-1, detects whether the first Type C interface is connected to an external device, and feeds back the detection results (i.e., the device connection detection signal and the charging confirming signal) to the control circuit 400 and the power confirming circuit 300-1, respectively. When the first Type C interface is not connected to the external powered device, the device access detection signal of the high level is output from the first end of the first resistor R1 to the control circuit 400, when the first Type C interface is connected to the external powered device, the level of the power ground GND1 of the Type C connector U1 is lowered, and the device access detection signal of the low level is output from the first end of the first resistor R1 to the control circuit 400, so that the control circuit 400 can know whether the corresponding Type C interface is connected to the external powered device through the device access detection signal. The charging confirmation signal includes information of the charging power required by the powered device, and the power confirmation circuit 300-1 knows the charging power required by the correspondingly accessed powered device through the charging confirmation signal. Optionally, the Type C connector U1 is a Type C connection with a model CN 946.

In one embodiment, referring to fig. 5, the power confirmation circuit includes: the PD controller U2, a second capacitor C2, a third capacitor C3, a third resistor R3, a fourth resistor R4 and a fifth resistor R5; wherein, the power supply terminal VDD of the PD controller U2 is connected to the first terminal of the second capacitor C2 and the first terminal of the third resistor R3, the power supply terminal VDD of the PD controller U2 is connected to the second voltage signal, the second terminal of the second capacitor C2 is connected to the power ground, the second terminal of the third resistor R3 is connected to the third voltage signal, the reset terminal NRST of the PD controller U2 is connected to the first terminal of the third capacitor C3, the second terminal of the third capacitor C3 is connected to the power ground, the ground terminal PGND of the PD controller U2 is connected to the power ground, the regulated output terminal LDO _ CAP of the PD controller U2 is connected to the first terminal of the fifth capacitor C5, the reference voltage output terminal SAR _ ADC _ VREF of the PD controller U2 is connected to the first terminal of the fourth capacitor C4, the second terminal of the fourth capacitor C4, the second terminal of the fifth capacitor C5 is connected to the power ground, the first terminal of the first connection confirmation signal CC _ C24C 4 of the PD controller U2 is connected to the first terminal CC 4, the second connection confirmation signal terminal C0_ CC2 of the PD controller U2 is connected to the first terminal of the fifth resistor R5, the second terminal of the fourth resistor R4 and the second terminal of the fifth resistor R5 are connected to the Type C interface circuit, the bus clock terminal I2C _ SCL of the PD controller U2 and the bus data terminal I2C _ SDA/DAC of the PD controller U2 are connected to the control circuit 400, and the first data terminal OP1/POL of the PD controller U2, the pulse width modulation signal terminal PWM of the PD controller U2, and the second data terminal OP4 of the PD controller U2 are connected to the voltage conversion circuit.

In specific implementation, optionally, the second voltage signal is PD _5V _ H2, and the third voltage signal is

+5V _ Standby, the voltage values are the same. Optionally, the circuit composition and structure of the N power confirmation circuits are the same and are all the circuit composition and structure shown in fig. 5, each power confirmation circuit is connected to the corresponding voltage conversion circuit and the Type C interface circuit, and the N power confirmation circuits are connected to the control circuit 400 through a set of I2C buses. The power confirmation circuit shown in fig. 5 is taken as a first path for explanation, and is connected to the corresponding voltage conversion circuit 200-1 (i.e., a first path voltage conversion circuit) and the Type C interface circuit 100-1 (i.e., a first path Type C interface circuit). The first data terminal OP1/POL of the PD controller U2, the PWM signal terminal PWM of the PD controller U2 and the second data terminal OP4 of the PD controller U2 are jointly formed as a power regulation signal output terminal and a pumping feedback signal input terminal of the power confirmation circuit 300-1. The PD controller U2 enables information interaction with the voltage conversion circuit 200-1 via another set of serial buses. Each PD controller U2 receives the power control signal and then outputs a power adjustment signal in a pulse width modulation format, and controls the corresponding voltage conversion circuit to adjust the voltage value of the external charging and adjust the maximum output current value, so as to control the charging power output externally.

Optionally, the PD controller U2 adopts a dual-port USB Type-C PD controller with a model LDR6282, which is a PD controller with a relatively high market price at present, but the present solution is not limited thereto, and other similar or equivalent PD controllers are also within the consideration of the present solution.

In one embodiment, referring to fig. 6, the control circuit 400 includes: the main control chip U3, a sixth resistor R6 and a seventh resistor R7; the first bus clock terminal PAD _ GPIO52/MSCL1/UART _ RX of the main control chip U3 is connected to the first terminal of the sixth resistor R6, the first bus data terminal PAD _ GPIO53/MSDA1/UART _ TX of the main control chip U3 is connected to the first terminal of the seventh resistor R7, the second terminal of the sixth resistor R6 and the second terminal of the seventh resistor R7 are both connected to each power confirmation circuit, and the first data input/output terminal PAD _ GPIO1 of the main control chip U3 is connected to one Type C interface circuit.

In specific implementation, the first bus clock terminal of the main control chip U3

PAD _ GPIO52/MSCL1/UART _ RX and first bus data terminal PAD _ GPIO53/MSDA1/UART _ TX of master control chip U3 jointly form a power control signal output terminal and a power demand signal input terminal of control circuit 400, and master control chip U3 realizes bidirectional information interaction with N circuits of power confirmation circuits (300-1 to 300-N) through a group of I2C buses so as to dynamically allocate power to an external powered device accessed by a Type C interface.

Optionally, the main control chip U3 is the main control chip Scaler of display device, and it mainly includes audio/video decoding and little the control unit function (MCU control function promptly), and this application scheme realizes carrying out dynamic distribution power to the outside powered device of many Type C interface access through the little the control unit function of main control chip Scaler.

In one embodiment, please refer to fig. 7, which illustrates a schematic circuit diagram of the first path voltage converting circuit 200-1. In specific implementation, optionally, the components and structures of the voltage conversion circuits are the same, for example, the components and structures are the same as those shown in fig. 7. The power extraction detection unit 200-1-2 is a resistor R971, the resistor R971 performs voltage division sampling on the charging signal (i.e., CHARGEVCC _ D0) to generate a power extraction detection signal (VBUS1_ D0), and the current corresponding to the charging signal is fed back to the transformer chip U4 in the transformer unit 200-1-1 through the voltage of the resistor R971.

Optionally, the voltage transforming chip U4 employs a voltage up/down chip SC 8815. Specifically, the voltage transformation unit 200-1-1 mainly composed of the boost/buck chip SC8815 and the N-channel enhancement mode field effect transistors U15, U16, U17, and U18 performs boost and buck processing on the input power signal (DC _ BKL) to provide a charging signal for the powered device accessed by the Type C interface.

Alternatively, if the input power signal (DC _ BKL) is greater than 20V, the transformer chip U4 may be a pure buck converter chip, which may reduce the cost.

In specific implementation, the multi-Type C interface dynamic power supply apparatus dynamically allocates charging power to efficiently charge the accessed external powered devices by detecting whether the Type C interfaces in each Type C interface circuit are accessed to the external powered devices and according to the number of the external powered devices accessed by the Type C interfaces and the required power, so as to simultaneously support external charging of multiple ports, and this power average allocation mechanism is better than user experience and better conforms to the application scenario of multi-terminal user charging; and this kind of dynamic allocation scheme, total power can be greater than 100W (be less than 300W), is favorable to practicing thrift through Type C interface to the design cost and the volume of the PD battery charging outfit that the outside powered device that inserts charges, improves many Type C ports external charging efficiency and charging power utilization ratio.

The display device has a plurality of Type C interfaces, supports a plurality of ports to charge externally, and can charge the external powered device accessed with high efficiency according to the quantity of the external powered device accessed by the Type C interfaces and the dynamic distribution charging power of required power, and prompts the user experience and the utilization efficiency of charging electric energy.

It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional circuits, units and modules is only used for illustration, and in practical applications, the above function distribution may be performed by different functional circuits, units and modules as required, that is, the internal structure of the apparatus may be divided into different functional circuits, units or modules to perform all or part of the above described functions. In addition, specific names of the functional circuits, units and modules are only used for distinguishing one functional circuit from another, and are not used for limiting the protection scope of the present application.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. The utility model provides a many types C interface developments supply circuit which characterized in that includes: the circuit comprises N paths of Type C interface circuits, N paths of voltage conversion circuits, N paths of power confirmation circuits and a control circuit;

2. The multi-Type C-interface dynamic power supply circuit of claim 1, wherein the multi-Type C-interface dynamic power supply circuit further comprises:

3. The multiple Type C interface dynamic power supply circuit of claim 1, wherein the voltage conversion circuit comprises: the device comprises a voltage transformation unit and a power extraction detection unit;

4. The multi-Type C-interface dynamic power supply circuit of claim 1, wherein the control circuit is specifically configured to generate M first power control signals according to M device access detection signals to control an average distribution of charging power to M accessed powered devices.

5. The multi-Type C-interface dynamic power supply circuit of claim 3, wherein the control circuit is specifically configured to determine whether a total power of the accessed powered device is greater than a preset total power threshold according to the M paths of power demand signals; and are

6. The multi-Type C interface dynamic power supply circuit of claim 1, wherein the Type C interface circuit comprises: the device comprises a Type C connector, a first capacitor, a first resistor and a second resistor; the interface power end of the Type C connector is connected with the first end of the first capacitor and the voltage conversion circuit, the first confirmation signal end of the Type C connector and the second confirmation signal end of the Type C connector are connected with the power confirmation circuit, the power ground end of the Type C connector is connected with the first end of the first resistor, the first end of the second resistor and the control circuit, the second end of the first resistor is connected with the power ground, the second end of the second resistor is a first voltage signal input end, and the equipment ground end of the Type C connector is connected with the power ground.

7. The multiple Type C-interface dynamic power supply circuit of claim 1, wherein the power validation circuit comprises: the PD controller, the second capacitor, the third resistor, the fourth resistor and the fifth resistor; wherein a power end of the PD controller is connected to a first end of the second capacitor and a first end of the third resistor, a power end of the PD controller is connected to a second voltage signal, a second end of the second capacitor is connected to a power ground, a second end of the third resistor is connected to a third voltage signal, a reset end of the PD controller is connected to a first end of the third capacitor, a second end of the third capacitor is connected to the power ground, a ground end of the PD controller is connected to the power ground, a voltage stabilizing output end of the PD controller is connected to a first end of the fifth capacitor, a reference voltage output end of the PD controller is connected to a first end of the fourth capacitor, a second end of the fourth capacitor and a second end of the fifth capacitor are connected to the power ground, and a first connection confirmation signal end of the PD controller is connected to a first end of the fourth resistor, a second connection confirmation signal end of the PD controller is connected to a first end of the fifth resistor, a second end of the fourth resistor and a second end of the fifth resistor are connected to the Type C interface circuit, a bus clock end of the PD controller and a bus data end of the PD controller are connected to the control circuit, and a first data end of the PD controller, a pulse width modulation signal end of the PD controller, and a second data end of the PD controller are connected to the voltage conversion circuit.

8. The multiple Type C interface dynamic power supply circuit of claim 1, wherein the control circuit comprises: the main control chip, the sixth resistor and the seventh resistor; the first bus clock end of the main control chip is connected with the first end of the sixth resistor, the first bus data end of the main control chip is connected with the first end of the seventh resistor, the second end of the sixth resistor and the second end of the seventh resistor are connected with the power confirmation circuit, and the first data input/output end of the main control chip is connected with the Type C interface circuit.

9. A multi-Type C interface dynamic power supply device, wherein the multi-Type C interface dynamic power supply device comprises the multi-Type C interface dynamic power supply circuit according to any one of claims 1 to 8.

10. A display device, characterized in that the display device comprises a multi-Type C interface dynamic power supply circuit according to any one of claims 1 to 8 or a multi-Type C interface dynamic power supply apparatus according to claim 9.