WO2023015720A1

WO2023015720A1 - Bidirectional charging circuit and apparatus

Info

Publication number: WO2023015720A1
Application number: PCT/CN2021/124607
Authority: WO
Inventors: 张水莎
Original assignee: 惠州Tcl云创科技有限公司
Priority date: 2021-08-12
Filing date: 2021-10-19
Publication date: 2023-02-16
Also published as: CN113690967A

Abstract

The present disclosure relates to a bidirectional charging circuit and apparatus. The bidirectional charging circuit comprises a first transmission module, a main control module, a power source module, and a logic control module, wherein the logic control module is used for outputting a first detection signal to the main control module when it is detected that the first transmission module is connected to an external electronic device; the first transmission module is used for being connected to the external electronic device or a power adapter, and outputting a second detection signal to the main control module when it is detected that the first transmission module is connected to the power adapter; the main control module is used for outputting a first control signal to the power source module according to the first detection signal, or outputting a second control signal to the power source module according to the second detection signal; and the power source module is used for supplying electric energy to the external electronic device via the first transmission module according to the first control signal, or for receiving, according to the second control signal, electric energy input by the power adapter via the first transmission module so as to supply electric energy to the main control module. In the present disclosure, a first transmission module is added to perform bidirectional charging on a power source module, thereby reducing resource waste.

Description

A bidirectional charging circuit and device

priority

The PCT patent application claims the priority of a Chinese patent with an application date of August 12, 2021 and an application number of 202110926408.1. This patent application combines the technical solutions of the above patents.

technical field

The disclosure relates to the technical field of electronic circuits, in particular to a bidirectional charging circuit and device.

Background technique

On the AR Glass host based on RK3229+RK816, the existing technology only supports the bidirectional charging of the USB Micro-B interface, and does not support the bidirectional charging of the Type-C interface. In order to improve the above problems, other powerful platforms adopt the cancellation of Micro- B interface, instead only supports the technical solution of Type-C interface, but this leads to an increase in platform upgrade costs and a waste of resources.

Thereby prior art still needs to improve and improve.

public content

In view of the shortcomings of the above-mentioned prior art, the purpose of the present disclosure is to provide a bidirectional charging circuit and device, which can realize bidirectional charging by adding a Type-C interface to the original AR host, thereby effectively reducing the waste of resources and platform upgrade fees.

In order to achieve the above object, the present disclosure adopts the following technical solutions:

The first aspect of the present disclosure relates to a bidirectional charging circuit, which is connected to a power adapter, an external power supply or an external electronic device, and the bidirectional charging circuit includes a first transmission module, a main control module, a power supply module, a logic control module, and a second transmission module and interface modules;

The main control module is respectively connected to the first transmission module and the power supply module, the logic control module is also connected to the power supply module, and the first transmission module is also connected to the logic control module and the power supply module module connection;

The logic control module is configured to output a first detection signal to the main control module when detecting that the first transmission module is connected to an external electronic device;

The first transmission module is used to connect an external electronic device or a power adapter, and output a second detection signal to the main control module when it is detected that the power adapter is connected;

The main control module is configured to output a first control signal to the power module according to the first detection signal, or output a second control signal to the power module according to the second detection signal;

The power supply module is used to provide electric energy for the external electronic device through the first transmission module according to the first control signal, or receive input from the power adapter through the first transmission module according to the second control signal electric energy;

The second transmission module; the second transmission module is respectively connected with the first transmission module, the logic control module and the main control module; the second transmission module is used for all the output of the logic control module The first detection signal is output to the main control module;

an interface module, the interface module is connected to the first transmission module, the power supply module and the logic control module, and the interface module is used to output the first current detection signal output by the logic control module and the The second current detection signal is output to the main control module.

In the bidirectional charging circuit, the first transmission module includes a detection unit and a voltage transformation unit; the detection unit is connected to the voltage transformation unit and the logic control module; the detection unit is used for detecting the When the external electronic device is connected, output a first access signal to the logic control module, and when the power adapter is connected, output a second access signal to the main control module.

In the bidirectional charging circuit, the logic control module includes a control unit and a pull-up unit; the control unit is connected to the first transmission module and the pull-up unit; the pull-up unit is also connected to a power module ; the control unit is used to output the first detection signal to the main control module according to the first access signal; the pull-up unit is used to provide a high level signal for the control unit.

In the bidirectional charging circuit, the main control module includes a main control chip; the main control chip is connected to the detection unit, and is used to control the power supply according to the first detection signal output by the detection unit The module provides electric energy for the external electronic equipment through the first transmission module, or is used to first generate a second detection signal according to the second access signal output by the detection unit, and then control according to the second detection signal The power module receives the electric energy input by the power adapter through the first transmission module.

In the bidirectional charging circuit, the power module includes a power control unit and a battery pack; the power control unit is connected to the main control module, the first transmission module and the battery pack; the battery control unit It is used to control the battery pack to provide reverse current according to the first control information, and to control the battery pack to receive charging current to charge the battery pack itself according to the second control information; the battery pack is used to provide current to external electronic equipment Or receive current from the power adapter.

The second aspect of the present disclosure relates to a bidirectional charging circuit, which is connected to a power adapter or an external electronic device. The bidirectional charging circuit includes a first transmission module, a main control module, a power supply module and a logic control module; The first transmission module is connected to the power module, the logic control module is also connected to the power module, and the first transmission module is also connected to the logic control module and the power module; the logic control The module is used to output a first detection signal to the main control module when it detects that the first transmission module is connected to an external electronic device; the first transmission module is used to connect an external electronic device or a power adapter, and when it detects output a second detection signal to the main control module when the power adapter is connected; the main control module is used to output a first control signal to the power supply module according to the first detection signal, or The signal outputs a second control signal to the power module; the power module is used to provide power for the external electronic device through the first transmission module according to the first control signal, or receive power according to the second control signal The power input by the power adapter via the first transmission module.

The bidirectional charging circuit also includes a second transmission module; the second transmission module is respectively connected to the first transmission module, the logic control module and the main control module; the second transmission module is used to transfer the The first detection signal output by the logic control module is output to the main control module.

In the bidirectional charging circuit, the first transmission module includes a detection unit and a voltage transformation unit; the detection unit is connected to the voltage transformation unit and the logic control module; the detection unit is used for when the external electronic When the device is connected, a first connection signal is output to the logic control module, and when the power adapter is connected, a second connection signal is output to the main control module.

In the bidirectional charging circuit, the logic control module includes a control unit and a pull-up unit; the control unit is connected to the first transmission module and the pull-up unit; the pull-up unit is also connected to a power module; The control unit is used to output the first detection signal to the main control module according to the first access signal; the pull-up unit is used to provide a high level signal for the control unit.

In the bidirectional charging circuit, the main control module includes a main control chip; the main control chip is connected to the detection unit, and is used to control the power module according to the first detection signal output by the detection unit Providing electric energy to the external electronic equipment through the first transmission module, or generating a second detection signal according to the second access signal output by the detection unit, and then controlling the external electronic device according to the second detection signal The power supply module receives the electric energy input by the power adapter through the first transmission module.

In the bidirectional charging circuit, the detection unit includes a first interface, a first resistor, a second resistor, a third resistor, a fourth resistor, a first electrostatic tube, a second electrostatic tube, a third electrostatic tube, and a fourth electrostatic tube. tube, a fifth electrostatic tube, a transient diode, a first capacitor, a second capacitor, and a third capacitor; one end of the first electrostatic tube is connected to the A8 signal port of the first interface, and the second electrostatic tube One end and one end of the first resistor are both connected to the A5 signal end of the first interface, one end of the third electrostatic tube and one end of the second resistor are both connected to the B5 signal end of the first interface, and the The A5 signal end and the B5 signal end of the first interface are also connected to the logic control module, the other end of the first electrostatic tube, the other end of the second electrostatic tube, and the other end of the third electrostatic tube , the other end of the first resistor and the other end of the second resistor are both grounded; one end of the fourth electrostatic tube is connected to the A6 and B6 signal ends of the first interface, and the A6 and B6 of the first interface The signal end is also connected to the transformation unit, the other end of the fourth electrostatic tube is grounded; one end of the fifth electrostatic tube is connected to the A7 and B7 signal ends of the first interface, and the first interface's A7 and B7 signal terminals are also connected to the transformation unit, the other end of the fifth electrostatic tube is grounded; one end of the first capacitor, one end of the second capacitor, one end of the transient diode and the One end of the third resistor is connected to the A9 signal end of the first interface, the A9 signal end of the first interface is also connected to the power supply, the other end of the third resistor is connected to one end of the fourth resistor, One end of the third capacitor is connected to the second transmission module, the other end of the first capacitor, the other end of the second capacitor, the other end of the transient diode, the other end of the fourth resistor and The other ends of the third capacitor are grounded.

In the bidirectional charging circuit, the voltage transformation unit includes a fifth resistor, a sixth resistor and a transformer; the first pin of the transformer is connected to one end of the sixth resistor, and the fourth pin of the transformer is connected to one end of the sixth resistor. The other end of the sixth resistor is connected to the second transmission module, the second pin of the transformer is connected to one end of the fifth resistor and the second transmission module, and the third pin of the transformer Connect with the other end of the fifth resistor.

In the bidirectional charging circuit, the control unit includes a logic control chip, a seventh resistor, an eighth resistor, and a fourth capacitor, and the first pin and the second pin of the logic control chip are connected to the first transmission module , the 7th pin, the 8th pin, the 9th pin and the 11th pin of the logic control chip are all connected to the pull-up unit, and the 9th pin of the logic control chip is also connected to the second transmission module and the The pull-up unit is connected; one end of the seventh resistor is connected to the 6th pin of the logic control chip and one end of the fourth capacitor, and the other end of the seventh resistor is connected to the 12th pin of the logic control chip. The pins are all connected to the power supply; the eighth resistor is connected to the 5th pin and the 12th pin of the logic control chip, and the 12th pin of the logic control chip is also connected to the power supply.

In the bidirectional charging circuit, the pull-up unit includes a ninth resistor, a tenth resistor, an eleventh resistor, and a twelfth resistor, one end of the ninth resistor, one end of the tenth resistor, the first One end of the eleventh resistor and one end of the twelfth resistor are connected to the power port, the other end of the ninth resistor, the other end of the tenth resistor, the other end of the eleventh resistor and the The other ends of the twelfth resistors are both connected to the second transmission module.

In the bidirectional charging circuit, the bidirectional charging circuit further includes an interface module, the interface module is connected with the first transmission module, the power supply module and the logic control module, and the interface module is used to connect the The first current detection signal and the second current detection signal output by the logic control module are output to the main control module.

In the bidirectional charging circuit, the power control unit is an RK816 chip.

In the bidirectional charging circuit, the main control chip is an RK3229 chip.

In the bidirectional charging circuit, the first detection information is a low-level signal, and the second detection information is a high-level signal; the first control information is downlink port mode information or plug-and-play mode information ; The second control information is uplink port mode information.

The third aspect of the present disclosure relates to a bidirectional charging device, which includes a PCB board, and the PCB board is provided with the above-mentioned bidirectional charging circuit.

Compared with the prior art, the present disclosure provides a bidirectional charging circuit and device. The bidirectional charging circuit includes a first transmission module, a main control module, a power supply module and a logic control module; the first transmission module is used to connect external electronic equipment or Power adapter; the logic control module is used to output the first detection signal to the main control module when it detects that the first transmission module is connected to an external electronic device, or output the second detection signal to the main control module when it detects that the first transmission module is connected to a power adapter The main control module; the main control module is used to output the first control signal to the power module according to the first detection signal, or output the second control signal to the power module according to the second detection signal; the power module is used to output the first control signal to the power module according to the first control signal. The transmission module provides electric energy for external electronic equipment, or receives electric energy input by the power adapter through the first transmission module according to the second control signal to provide electric energy for the main control module; the present disclosure provides bidirectional charging for the power supply module by adding the first transmission module, thereby reducing Waste of resources.

Description of drawings

FIG. 1 is a structural block diagram of a bidirectional charging circuit provided by the present disclosure;

2-3 are circuit diagrams of the first transmission module in the bidirectional charging circuit provided by the present disclosure;

FIG. 4 is a circuit diagram of a logic control module in a bidirectional charging circuit provided by the present disclosure;

5 is a circuit diagram of a second transmission module in the bidirectional charging circuit provided by the present disclosure;

FIG. 6 is a circuit diagram of an interface module in the bidirectional charging circuit provided by the present disclosure.

Reference signs: 10: bidirectional charging circuit; 20: power adapter; 30: external power supply; 40: external electronic equipment; 100: first transmission module; 110: detection unit; 120: voltage transformation unit; 200: logic control module; 210: control unit; 220: pull-up unit; 300: main control module; 400: power module; 500: second transmission module; 600: interface module; R1: first resistor; R2: second resistor; R3: third Resistor; R4: fourth resistor; R5: fifth resistor; R6: sixth resistor; R7: seventh resistor; R8: eighth resistor; R9: ninth resistor; R10: tenth resistor; R11: eleventh resistor ;R12: the twelfth resistor; R13: the thirteenth resistor; R14: the fourteenth resistor; R15: the fifteenth resistor; R16: the sixteenth resistor; R17; the seventeenth resistor; R18: the eighteenth resistor; R19: the nineteenth resistor; R20: the twentieth resistor; D1: the first electrostatic tube; D2: the second electrostatic tube; D3: the third electrostatic tube; D4: the fourth electrostatic tube; D5: the fifth electrostatic tube; D6 : sixth electrostatic tube; TVS: transient diode; S1: first switch; C1: first capacitor; C2: second capacitor; C3: third capacitor; C4: fourth capacitor; C5: fifth capacitor; C6: Sixth capacitor; C7: seventh capacitor; C8: eighth capacitor; C9: ninth capacitor; C10: tenth capacitor; J1: first interface; J2: second interface; J3: third interface; U1: logic control chip.

Detailed ways

The bidirectional charging circuit and device provided in the present disclosure can implement bidirectional charging by adding a Type-C interface to the original AR host, thereby effectively reducing resource waste and platform upgrade costs.

In order to make the purpose, technical solutions and effects of the present disclosure more clear and definite, the present disclosure will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present disclosure, not to limit the present disclosure.

Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the specification of the present disclosure refers to the presence of the stated features, integers, steps, operations, elements and/or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Additionally, "connected" or "coupled" as used herein may include wireless connection or wireless coupling. The expression "and/or" used herein includes all or any elements and all combinations of one or more associated listed items.

Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this disclosure belongs. It should also be understood that terms, such as those defined in commonly used dictionaries, should be understood to have meanings consistent with their meaning in the context of the prior art, and unless specifically defined as herein, are not intended to be idealized or overly Formal meaning to explain.

The radio frequency front-end circuit design scheme is described below through specific exemplary embodiments. It should be noted that the following embodiments are only used to explain the disclosed technical solutions and do not specifically limit them:

Please refer to FIG. 1, a bidirectional charging circuit 10 provided by the present disclosure is connected to a power adapter 20, an external power supply 30 or an external electronic device 40, and the bidirectional charging circuit includes a first transmission module 100, a logic control module 200, a main control module 300 and power module 400; the main control module 300 is connected to the first transmission module 100 and the power module 400 respectively, the logic control module 200 is also connected to the power module 400, and the first transmission The module 100 is also connected to the logic control module 200 and the power supply module 400; the logic control module 200 is used to output a first detection signal to the first transmission module 100 when it detects that the external electronic device 40 is connected. The main control module 300 is further configured to output a first current detection signal to the main control module 300 when detecting that the first transmission module 100 is connected to an external power supply 30 or to detect that the first transmission module 100 is connected output the second current detection signal to the main control module 300 when it is the power adapter 20; The second detection signal is sent to the main control module 300; the main control module 300 is used to output a first control signal to the power module 400 according to the first detection signal, or output a second control signal according to the second detection signal. The control signal is sent to the power module 400, and the main control module 300 is also used to output a first current control signal to the power module 400 according to the first current detection signal or output a second current control signal according to the second current detection signal. The current control signal is sent to the power supply module 400; the power supply module 400 is used to provide electric energy for the external electronic device 40 through the first transmission module 100 according to the first control signal, or to supply power to the external electronic device 40 according to the second control signal Receiving the power inputted by the power adapter 20 through the first transmission module 100, the power module 400 is also configured to provide power for itself in the first current mode according to the first current control information or configured according to the second current control information Powering itself for the second current mode.

Wherein, the first detection information is a low-level signal; the second detection information is a high-level signal; the first control information is DFP (Downstream Facing Port: downstream port) mode information or OTG (OTG: On -The-Go: plug and play) mode information; the second control information is UFP (Upstream Facing Port: uplink port) mode information; the first current detection information is a small current signal; the second current information is a large current signal; the first control signal is a low current mode signal; the second control signal is a medium current mode signal or a high current mode signal; the first current mode is a low current mode; the second current mode is medium or high current mode.

Specifically, when the first transmission module 100 is connected to the external electronic device 40, firstly, the logic control module 200 outputs the first detection signal to the main control module 300, and secondly, the main control module 300 outputs the first detection signal according to the first detection signal. A control message is sent to the power supply module 400, and finally, the power supply module 400 provides electric energy for the external electronic device 40 through the first transmission module 100 according to the first control message.

When the first transmission module 100 is connected to the external power supply 30, the logic control module 200 outputs a first current detection signal to the main control module 300, and the main control module 300 outputs the first current detection signal according to the first current detection signal. A current control information is sent to the power module 400, and the power module 400 is configured to provide electric energy for itself in the first current mode according to the first current control information.

When the first transmission module 100 is connected to the power adapter 20, first, the first transmission module 100 outputs a second detection signal to the main control module 300, and at the same time, the logic control module 200 outputs a second current detection signal to the main control module 300; secondly, the main control module 300 outputs a second control signal to the power module 400 according to the second detection signal, and outputs a second current control signal according to the second current detection signal To the power module 400, finally, the power module 400 receives the electric energy input by the power adapter 20 through the first transmission module 100 according to the second control signal, and configures the second current control information according to the second current control information. Current mode supplies power to itself.

In this disclosure, the logic control module 200 outputs different level signals to the main control module 300 according to whether the first transmission module 100 is connected to the external electronic device 40 or the power adapter 20, and the main control module 300 then According to the level signal, when the first transmission module 100 is connected to the external electronic device 40, control the power supply module 400 to reversely provide power for the external electronic device 40 through the first transmission module 100; and When the first transmission module 100 is connected to the power adapter 20, the power adapter 20 is controlled to charge the power module 400 through the first transmission module 100, thereby realizing bidirectional charging of the first transmission module 100 simply and efficiently; Also, the logic control module 200 outputs different current detection signals to the main control module 300 according to whether the first transmission module 100 is connected to the external power supply 30 or the power adapter 20, and the main control module 300 outputs a different current detection signal to the main control module 300 according to the current detection signal, when the first transmission module 100 is connected to the external power supply 30 or the power adapter 20, control the power supply module 400 to configure the corresponding current mode according to different current control information to provide electric energy for the power supply module 400 itself, thereby The safety when charging the power module 400 is effectively ensured.

Further, the bidirectional charging circuit further includes a second transmission module 500; the second transmission module 500 is connected with the first transmission module 100, the logic control module 200, the power supply module 400 and the The module 300 is connected; the second transmission module 500 is configured to output the first detection signal output by the logic control module 200 to the main control module 300 .

Specifically, when the first transmission module 100 is connected to the external electronic device 40, the logic control module 200 outputs the first detection signal to the second transmission module 500, and the second transmission module 500 transmits the first detection signal to the main control module 300, so that the main control module 300 performs the next step; the second transmission module 500 is mainly used to transmit the first detection signal to the main control module 300, so as to notify the main control module 300 that there is an external electronic device 40 access.

Further, the bidirectional charging circuit further includes an interface module 600, the interface module 600 is connected with the first transmission module 100, the power supply module 400 and the logic control module 200, and the interface module 600 is used to connect The first current detection signal and the second current detection signal output by the logic control module 200 are output to the main control module 300 .

Specifically, when the first transmission module 100 is connected to the external power supply 30, firstly, the logic control module 200 outputs a first current detection signal to the interface module 600, and secondly, the interface module 600 sends the first The current detection signal is transmitted to the main control module 300, and then, the main control module 300 outputs a first current control signal to the power module 400 according to the first current detection signal, and finally, the power module 400 A current control information is configured for the first current mode to provide electric energy for itself.

When the first transmission module 100 is connected to the power adapter 20, first, the logic control module 200 outputs the second current detection signal to the interface module 600, and secondly, the interface module 600 outputs the second current detection signal Then, the main control module 300 outputs a second current control signal to the power module 400 according to the second current detection signal, and finally, the power module 400 controls the current according to the second current The information is configured such that the second current mode provides power for itself.

The interface module 600 outputs the first current detection signal and the second current detection signal to the main control module 300 to notify the main control module 300 that an external power supply 30 or a power adapter 20 is connected.

Further, please refer to FIG. 2 and FIG. 3 , the first transmission module 100 includes a detection unit 110 and a voltage transformation unit 120; the detection unit 110 is connected to the voltage transformation unit 120 and the logic control module 200; The detection unit 110 is used for outputting a first access signal to the logic control module 200 when the external electronic device 40 is connected, and outputting a second access signal to the logic control module 200 when the power adapter 20 is connected. Main control module 300.

Specifically, when the detection unit 110 is connected to the external electronic device 40, the detection unit 110 outputs the first access signal to the logic control module 200, so that the logic control module 200 performs the next operation; similarly, when the detection unit 110 When the power adapter 20 is connected, the detection unit 110 outputs a second access signal to the main control module 300 so that the main control module 300 can perform the next operation. The detection unit 110 is used to output different access signals when it is detected that the external electronic device 40 or the power adapter 20 is connected to it, so as to effectively generate a circuit-connected external electronic device 40 or the power adapter 20 that matches the circuit. access signal.

Further, please refer to FIG. 4, the logic control module 200 includes a control unit 210 and a pull-up unit 220; The pull-up unit 220 is connected; the pull-up unit 220 is also connected to the second transmission module 500 and the power supply module 400; the control unit 210 is configured to output the first detection signal according to the first access signal The signal is sent to the main control module 300; the pull-up unit 220 is used to provide the control unit 210 with a second detection signal.

Specifically, when the detection unit 110 is connected to the external electronic device 40, the detection unit 110 outputs the first access signal to the control unit 210, and the control unit 210 controls the pull-up unit 220 to output the first access signal according to the first access signal. A detection signal is sent to the second transmission module 500, and the second transmission module 500 transmits the first detection signal to the main control module 300, and the main control module 300 outputs according to the first detection signal The first control information is sent to the power supply module 400, and the power supply module 400 provides electric energy for the external electronic device 40 through the first transmission module 100 according to the first control information; through the control unit 210 according to the first access signal The pull-up unit 220 outputs the first detection signal to the second transmission module 500, thereby effectively converting the first access signal into a first detection signal that can be transmitted by the second transmission module 500, that is, to connect the external electronic device 40 The information is converted into a low-level signal that can be transmitted by the USB interface.

Further, the main control module 300 includes a main control chip; the main control chip is connected to the detection unit 110 for controlling the power supply module 400 according to the first detection signal output by the detection unit 110 Provide electric energy for the external electronic device 40 via the first transmission module 100, or for generating a second detection signal according to the second access signal output by the detection unit 110, and then generate a second detection signal according to the second detection The signal controls the power module 400 to receive the electric energy input by the power adapter 20 through the first transmission module 100, and the main control chip is also used to control the configuration of the power module 400 according to the first current detection signal. Provide electric energy for itself in the first current mode, or control the power module 400 to be configured to provide electric energy for itself in the second current mode according to the second current detection signal.

Specifically, when the second transmission module 500 transmits the first detection signal to the main control chip, the main control chip outputs first control information to the power supply module 400 according to the first detection signal, so The power supply module 400 provides power to the external electronic device 40 through the first transmission module 100 according to the first control information.

When the control unit 210 outputs the first current detection signal to the main control chip, the main control chip outputs the first current control information to the power module 400 according to the first current detection signal, and the power module 400 according to the first current detection signal A current control information is configured for the first current mode to provide electric energy for itself.

When the detection unit 110 is connected to the power adapter 20, the detection unit 110 outputs a second access signal to the main control chip, and the main control chip generates a second detection signal according to the second access signal, and then according to the first The second detection signal outputs a second control signal to the power module 400 , and the power module 400 receives the electric energy input by the power adapter 20 through the first transmission module 100 according to the second control information.

The main control chip controls the power adapter 20 to supply power to the power module 400 through the first transmission module 100, or controls the power module 400 to supply power to the external electronic device 40 through the first transmission module 100. Charging, thereby effectively realizing the bidirectional charging of the first transmission module 100 . The main control chip is RK3229 chip, which is a high-performance quad-core application processor, mainly used in smart TV boxes.

Further, the power module 400 includes a power control unit and a battery pack; the power control unit is connected to the main control module 300, the first transmission module 100 and the battery pack; the battery control unit 210 is used to Control the battery pack to provide reverse current according to the first control information, and control the battery pack to receive charging current to charge the battery pack itself according to the second control information; the battery pack is used to provide current to the external electronic device 40 Or receive the current of the power adapter 20 .

Specifically, when the main control chip outputs first control information to the power control unit according to the first detection signal, the power control unit controls the battery pack to pass through the first transmission module 100 according to the first control information. The external electronic device 40 provides electric energy.

When the main control chip generates a second detection signal according to the second access signal, and then outputs a second control signal to the power control unit according to the second detection signal, the power control unit The battery pack is controlled to receive the electric energy input by the power adapter 20 via the first transmission module 100 .

When the main control chip outputs first current control information to the power control unit according to the first current detection signal, the power control unit is configured to provide the battery pack with the first current mode according to the first current control information. electrical energy.

When the main control module 300 outputs a second current control signal to the power control unit according to the second current detection signal, the power control unit is configured to provide electric energy for the battery pack in the second current mode according to the second current control information .

According to different control information, the power supply control unit correspondingly controls whether the battery pack charges itself or reversely supplies power, thereby effectively controlling the charging and discharging state of the battery pack according to different control information. Moreover, the power supply control unit correspondingly controls the battery pack to match different charging current modes according to different current control information, thereby effectively realizing the control of the charging current mode of the battery pack according to different current control information. Among them, the power control unit is RK816 chip, which is a kind of power management chip, mainly used in conjunction with RK3229 chip.

Further, please continue to refer to FIG. 2 and FIG. 3 , the detection unit 110 includes a first interface J1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first electrostatic tube D1, a second Two electrostatic tubes D2, the third electrostatic tube D3, the fourth electrostatic tube D4, the fifth electrostatic tube D5, the transient diode TVS, the first capacitor C1, the second capacitor C2 and the third capacitor C3; the first electrostatic tube D1 One end of the first interface J1 is connected to the A8 signal port, one end of the second electrostatic tube D2 and one end of the first resistor R1 are both connected to the A5 signal end of the first interface J1, and the third One end of the electrostatic tube D3 and one end of the second resistor R2 are both connected to the B5 signal end of the first interface J1, and both the A5 signal end and the B5 signal end of the first interface J1 are also connected to the logic control module 200 , the other end of the first electrostatic tube D1, the other end of the second electrostatic tube D2, the other end of the third electrostatic tube D3, the other end of the first resistor R1 and the other end of the second resistor R2 Both ends are grounded; one end of the fourth electrostatic tube D4 is connected to the A6 and B6 signal terminals of the first interface J1, and the A6 and B6 signal terminals of the first interface J1 are also connected to the transformation unit 120, The other end of the fourth electrostatic tube D4 is grounded; one end of the fifth electrostatic tube D5 is connected to the A7 and B7 signal terminals of the first interface J1, and the A7 and B7 signal terminals of the first interface J1 are also connected to the The transformation unit 120 is connected, the other end of the fifth electrostatic tube D5 is grounded; one end of the first capacitor C1, one end of the second capacitor C2, one end of the transient diode TVS and the first One end of the three resistors R3 is connected to the A9 signal end of the first interface J1, the A9 signal end of the first interface J1 is also connected to the power supply, and the other end of the third resistor R3 is connected to the fourth resistor R4 One end of the third capacitor C3 is connected to the second transmission module 500, the other end of the first capacitor C1, the other end of the second capacitor C2, the other end of the transient diode TVS, the The other end of the fourth resistor R4 and the other end of the third capacitor C3 are both grounded.

Specifically, when the A5 signal terminal and B5 signal terminal (in this embodiment, TYPE_CC1 and TYPE_CC2 ports) of the first interface J1 are connected to the external electronic device 40, the first interface J1 passes the A5 signal of the first interface J1 The terminal and the B5 signal terminal output the first access signal to the control unit 210, so that the control unit 210 can perform the next operation.

When the A5 signal terminal and B5 signal terminal of the first interface J1 are connected to the external power supply 30, the control unit 210 outputs the first current detection signal to the interface module 600, and the interface module 600 outputs the first current detection signal It is transmitted to the main control chip, so that the main control chip can perform the next operation.

When the A5 signal terminal and B5 signal terminal of the first interface J1 are connected to the power adapter 20, the first interface J1 outputs the second detection signal and the At the same time, the control unit 210 outputs the second current detection signal to the interface module 600, and the interface module 600 transmits the second current detection signal to the main control chip, so that the main control chip Proceed to the next step; wherein, the first interface J1 is a Type-C interface. Wherein, the transient diode TVS is used to reduce various surge pulses; the electrostatic tube is used to weaken the influence of ESD (Electro-Static discharge: electrostatic discharge).

Furthermore, the transformation unit 120 includes a fifth resistor R5, a sixth resistor R6 and a transformer; the first pin of the transformer is connected to one end of the sixth resistor R6, and the fourth pin of the transformer The other end of the sixth resistor R6 is connected to the second transmission module 500, the second pin of the transformer is connected to one end of the fifth resistor R5 and the second transmission module 500, and the transformer The third pin is connected to the other end of the fifth resistor R5.

Further, please continue to refer to FIG. 4 , the control unit 210 includes a logic control chip U1, a seventh resistor R7, an eighth resistor R8, and a fourth capacitor C4, and the first pin and the second pin of the logic control chip U1 are both Connected to the first transmission module 100, the 7th pin, 8th pin, 9th pin and 11th pin of the logic control chip U1 are all connected to the pull-up unit 220, the 1st pin of the logic control chip U1 Pin 9 is also connected to the second transmission module 500 and the pull-up unit 220; one end of the seventh resistor R7 is connected to the sixth pin of the logic control chip U1 and one end of the fourth capacitor C4, The other end of the seventh resistor R7 and the 12th pin of the logic control chip U1 are connected to the power supply; the eighth resistor R8 is connected to the 5th pin and the 12th pin of the logic control chip U1, and the The 12th pin of the logic control chip U1 is also connected to the power supply.

Specifically, when the first interface J1 is connected to the external electronic device 40, the first interface J1 outputs a first access signal to the logic control chip U1, and the logic control chip U1 controls the pull-up signal according to the first access signal. The unit 220 outputs the first detection signal to the second transmission module 500 via the 9th pin of the logic control chip U1 (OTG_ID port in this embodiment), so that the second transmission module 500 can perform the next operation.

When the first interface J1 is connected to the external power supply 30, pins 7 and 8 of the logic control chip U1 output a first current detection signal to the interface module 600, so that the interface module 600 can perform the next operation.

When the first interface J1 is connected to the power adapter 20, similarly, the 7th and 8th pins of the logic control chip U1 output a second current detection signal to the interface module 600, so that the interface module 600 can proceed to the next step. operate.

When the logic control chip U1 is connected to the external electronic device 40, the external power supply 30 or the power adapter 20 according to the first interface J1, a corresponding detection signal is generated, thereby effectively reflecting the type of the connected device of the interface.

Furthermore, the pull-up unit 220 includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11 and a twelfth resistor R12, one end of the ninth resistor R9, one end of the tenth resistor R10 , one end of the eleventh resistor R11 and one end of the twelfth resistor R12 are both connected to the power module 400, the other end of the ninth resistor R9, the other end of the tenth resistor R10, the second The other end of the eleventh resistor R11 and the other end of the twelfth resistor R12 are both connected to the second transmission module 500 .

Further, referring to FIG. 5, the second transmission module 500 includes a second interface J2, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a fifth capacitor C5, a sixth capacitor C6 and a Seventh capacitor C7; one end of the thirteenth resistor R13 is connected to the V11 signal end of the second interface J2, one end of the fourteenth resistor R14 is connected to the V10 signal end of the second interface J2, and the One end of the fifth capacitor C5 is connected to the T10 signal end of the second interface J2 and the power module 400, the other end of the thirteenth resistor R13, the other end of the fourteenth resistor R14 are connected to the fifth capacitor The other ends of C5 are both grounded; one end of the fifteenth resistor R15 is connected to one end of the sixth capacitor C6 and the T11 signal end of the second interface J2, and the other end of the fifteenth resistor R15 is connected to the T11 signal end of the second interface J2. One end of the seventh capacitor C7 is connected to the power module 400, and the other end of the sixth capacitor C6 and the other end of the seventh capacitor C7 are grounded.

Specifically, when the logic control chip U1 controls the pull-up unit 220 to output the first detection signal according to the first access signal, the first detection signal is transmitted to the The second interface J2, and the second interface J2 transmits the first detection signal to the main control chip, so that the main control chip can perform the next operation. The first detection signal output by the logic control chip U1 is effectively and stably transmitted to the main control chip through the second interface J2, thereby notifying the main control chip that an external electronic device 40 is connected; wherein, the second interface J2 is USB interface.

Further, referring to FIG. 6, the interface module 600 includes a third interface J3, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor, a nineteenth resistor, a twentieth resistor R20, an eighth capacitor C8, the ninth capacitor C9, the tenth capacitor C10, the sixth electrostatic tube D6 and the first switch S1; the N20 signal end of the third interface J3 is connected to one end of the eighth capacitor C8, and the third interface J3 The U10 signal end of the U10 is connected to one end of the ninth capacitor C9, one end of the sixteenth resistor R16, one end of the seventeenth resistor R17 and the first transmission module 100, and the third interface J3 The G14 signal terminal and one end of the tenth capacitor C10 are both connected to the power module 400, the K19 signal terminal of the third interface J3 is connected to one end of the eighteenth resistor, and the L20 signal terminal of the third interface J3 connected to one end of the nineteenth resistor, the H16 signal end of the third interface J3 is connected to one end of the twentieth resistor R20, and the G16, G17 signal end and G19 signal end of the third interface J3 are all Connected to the logic control module 200, the other end of the eighth capacitor C8, the other end of the ninth capacitor C9 and the other end of the tenth capacitor C10 are all grounded, and the other end of the sixteenth resistor R16 One end is connected to the power supply, the other end of the seventeenth resistor R17 is connected to one end of the sixth electrostatic tube D6 and one end of the first switch S1, the other end of the sixth electrostatic tube D6 is connected to the The other ends of the first switch S1 are both grounded.

Specifically, when the first interface J1 is connected to the external power supply 30, the logic control chip U1 outputs the first current detection signal to the third interface J3, and the third interface J3 transmits the first current detection signal to the the main control chip, so that the main control chip can perform the next operation.

When the first interface J1 is connected to the power adapter 20, the logic control chip U1 outputs the second current detection signal to the third interface J3, and the third interface J3 transmits the second current detection signal to the main control chip, so that the main control chip can perform the next operation.

Through the third interface J3, the different detection signals output by the logic control chip U1 are effectively and stably transmitted to the main control chip, thereby notifying the first interface J1 that different charging devices are connected; wherein, the third interface J3 is GPIO interface.

In order to better understand the present disclosure, the working principle of the radio frequency front-end circuit of the present disclosure will be described in detail below in conjunction with FIGS. 1-4 :

When the TYPE_CC1 and TYPE_CC2 ports of the Type-C interface are connected to the external electronic device 40, first, the Type-C interface outputs the first access signal to the logic control chip through the first pin and the second pin of the logic control chip U1 U1, the logic control chip U1 outputs a low-level signal to the USB interface through the OTG_ID port of the logic control chip U1 according to the first access signal, and secondly, the USB interface transmits the low-level signal to Main control chip, the main control chip outputs DFP mode information to the power control unit according to the low-level signal, and finally, the power control unit controls the battery pack through the Type-C interface according to the DFP mode information providing electric energy for the external electronic device 40;

When the TYPE_CC1 and TYPE_CC2 ports of the Type-C interface are connected to the power adapter 20, first, the Type-C interface outputs a second access signal to the main control chip, and the main control chip generates a high Level signal, and then output UFP mode information to the power control unit according to the high level signal, and finally, the power control unit controls the battery pack to receive the power input from the power adapter 20 through the Type-C interface according to the UFP mode information electrical energy.

That is, when the Type-C interface is connected to an external electronic device 40, the logic control chip U1 outputs a low-level signal and transmits it to the main control chip through the USB interface to notify the main control chip that an external electronic device 40 is connected, and the main control chip outputs DFP mode Information to the power control unit, at this time, the power control unit controls the battery pack to provide power for the external electronic device 40 through the Type-C interface; when the Type-C interface is connected to the power adapter 20, the main control chip outputs UFP The mode information is sent to the power control unit. At this time, the power control unit controls the battery pack to receive the electric energy input by the power adapter 20 through the Type-C interface.

When the TYPE_CC1 and TYPE_CC2 ports of the Type-C interface are connected to the external power supply 30, first, the logic control chip U1 outputs a small current signal to the GPIO interface, and the GPIO interface transmits the small current signal to the main control chip, secondly, the main control chip outputs a low current mode signal to the power control unit according to the small current signal, and finally, the power control unit is configured to receive the external power supply 30 in a low current mode according to the low current mode signal Provides power to the battery pack.

When the TYPE_CC1 and TYPE_CC2 ports of the Type-C interface are connected to the power adapter 20, first, the logic control chip U1 outputs a high-current signal to the GPIO interface, and the GPIO interface transmits the high-current signal to the main control Chip, secondly, if it is connected to a low-power power adapter 20, the main control chip outputs a medium current mode signal to the power control unit according to the high-current signal; if it is connected to a high-power power adapter 20, the The main control chip outputs a high current mode signal to the power control unit according to the high current signal; finally, the power control unit is configured as a medium current mode or a high current mode according to the medium current mode signal or the high current mode signal Mode reception The power adapter 20 provides power for the battery pack.

That is, when the Type-C interface is connected to the external power supply 30, the logic control chip U1 outputs a small current signal and transmits it to the main control chip through the GPIO interface, and the main control chip outputs a low current mode signal to the power control chip according to the small current signal. unit, at this time, the power control unit is configured to receive the external power supply 30 in low current mode according to the low current mode signal to provide electric energy for the battery pack. When the Type-C interface is connected to the power adapter 20, the logic control chip U1 outputs a large current signal and transmits it to the main control chip through the GPIO interface. At this time, the main control chip will give priority to judging the power of the power adapter 20. The medium current mode signal is sent to the power control unit, and the power control unit is configured according to the medium current mode signal to receive the external power supply 30 in the medium current mode to provide electric energy for the battery pack; if it is high-power, then output the high current mode signal to the power control unit, The power control unit is configured to receive the external power supply 30 in high current mode according to the high current mode signal to provide electric energy for the battery pack;

Further, the present disclosure also provides a bidirectional charging device, including a PCB board, on which the bidirectional charging circuit 10 as described above is provided. Since the circuit has been described in detail above, details will not be repeated here. .

In summary, the present disclosure provides a bidirectional charging circuit and device. The bidirectional charging circuit includes a first transmission module, a main control module, a power supply module, and a logic control module; the logic control module is used to detect that the first transmission module Output the first detection signal to the main control module when the external electronic device is connected; the first transmission module is used to connect the external electronic device or power adapter, and output the second detection signal to the main control module when it is detected that the power adapter is connected ; The main control module is used to output the first control signal to the power module according to the first detection signal, or output the second control signal to the power module according to the second detection signal; The external electronic equipment provides electric energy, or receives the electric energy input by the power adapter through the first transmission module according to the second control signal to provide electric energy to the main control module; the present disclosure reduces the waste of resources by adding the first transmission module to bidirectionally charge the power supply module.

It can be understood that those skilled in the art can make equivalent replacements or changes according to the technical solutions and disclosed concepts of the present disclosure, and all these changes or replacements should belong to the protection scope of the appended claims of the present disclosure.

Claims

A bidirectional charging circuit, characterized in that it is connected to a power adapter, an external power supply or an external electronic device, and the bidirectional charging circuit includes a first transmission module, a main control module, a power supply module, a logic control module, a second transmission module and an interface module;

The main control module is respectively connected to the first transmission module and the power supply module, the logic control module is also connected to the power supply module, and the first transmission module is also connected to the logic control module and the power supply module module connection;

The logic control module is configured to output a first detection signal to the main control module when detecting that the first transmission module is connected to an external electronic device;

The first transmission module is used to connect an external electronic device or a power adapter, and output a second detection signal to the main control module when it is detected that the power adapter is connected;

The main control module is configured to output a first control signal to the power module according to the first detection signal, or output a second control signal to the power module according to the second detection signal;

The power supply module is used to provide electric energy for the external electronic device through the first transmission module according to the first control signal, or receive input from the power adapter through the first transmission module according to the second control signal electric energy;

The second transmission module; the second transmission module is respectively connected with the first transmission module, the logic control module and the main control module; the second transmission module is used for all the output of the logic control module The first detection signal is output to the main control module;

an interface module, the interface module is connected to the first transmission module, the power supply module and the logic control module, and the interface module is used to output the first current detection signal output by the logic control module and the The second current detection signal is output to the main control module.
The bidirectional charging circuit according to claim 1, wherein the first transmission module includes a detection unit and a voltage transformation unit; the detection unit is connected to the voltage transformation unit and the logic control module; the detection The unit is configured to output a first access signal to the logic control module when it is detected that the external electronic device is connected, and output a second connection signal to the main control module when the power adapter is connected.
The bidirectional charging circuit according to claim 2, wherein the logic control module includes a control unit and a pull-up unit; the control unit is connected to the first transmission module and the pull-up unit; The pull unit is also connected to the power module; the control unit is used to output the first detection signal to the main control module according to the first access signal; the pull-up unit is used to provide high level signal.
The bidirectional charging circuit according to claim 2, wherein the main control module includes a main control chip; the main control chip is connected to the detection unit, and is used for charging according to the first output of the detection unit. detection signal, controlling the power supply module to provide electric energy for the external electronic device through the first transmission module, or used to generate a second detection signal according to the second access signal output by the detection unit, and then according to the The second detection signal controls the power supply module to receive the electric energy input by the power adapter through the first transmission module.
The bidirectional charging circuit according to claim 2, wherein the power module includes a power control unit and a battery pack; the power control unit is connected to the main control module, the first transmission module and the battery pack connected; the battery control unit is used to control the battery pack to provide reverse current according to the first control information, and to control the battery pack to receive charging current to charge the battery pack itself according to the second control information; the battery pack uses Used to provide current to external electronic devices or receive current from a power adapter.
A bidirectional charging circuit, characterized in that it is connected to a power adapter, an external power supply or an external electronic device, and the bidirectional charging circuit includes a first transmission module, a main control module, a power supply module and a logic control module;

The main control module is respectively connected to the first transmission module and the power supply module, the logic control module is also connected to the power supply module, and the first transmission module is also connected to the logic control module and the power supply module module connection;

The logic control module is configured to output a first detection signal to the main control module when detecting that the first transmission module is connected to an external electronic device;

The first transmission module is used to connect an external electronic device or a power adapter, and output a second detection signal to the main control module when it is detected that the power adapter is connected;

The main control module is configured to output a first control signal to the power module according to the first detection signal, or output a second control signal to the power module according to the second detection signal;

The power supply module is used to provide electric energy for the external electronic device through the first transmission module according to the first control signal, or receive input from the power adapter through the first transmission module according to the second control signal of electric energy.
The bidirectional charging circuit according to claim 6, characterized in that, the bidirectional charging circuit further comprises a second transmission module; the second transmission module communicates with the first transmission module, the logic control module and the The main control module is connected; the second transmission module is used to output the first detection signal output by the logic control module to the main control module.
The bidirectional charging circuit according to claim 7, wherein the first transmission module includes a detection unit and a voltage transformation unit; the detection unit is connected to the voltage transformation unit and the logic control module; the detection The unit is configured to output a first access signal to the logic control module when it is detected that the external electronic device is connected, and output a second connection signal to the main control module when the power adapter is connected.
The bidirectional charging circuit according to claim 8, wherein the logic control module includes a control unit and a pull-up unit; the control unit is connected to the first transmission module and the pull-up unit; The pull unit is also connected to the power module; the control unit is used to output the first detection signal to the main control module according to the first access signal; the pull-up unit is used to provide high level signal.
The bidirectional charging circuit according to claim 8, wherein the main control module includes a main control chip; the main control chip is connected to the detection unit, and is used for charging according to the first output of the detection unit. detection signal, controlling the power supply module to provide electric energy for the external electronic device through the first transmission module, or used to generate a second detection signal according to the second access signal output by the detection unit, and then according to the The second detection signal controls the power supply module to receive the electric energy input by the power adapter through the first transmission module.
The bidirectional charging circuit according to claim 8, wherein the detection unit comprises a first interface, a first resistor, a second resistor, a third resistor, a fourth resistor, a first electrostatic tube, a second electrostatic tube, The third electrostatic tube, the fourth electrostatic tube, the fifth electrostatic tube, the transient diode, the first capacitor, the second capacitor and the third capacitor; one end of the first electrostatic tube is connected to the A8 signal port of the first interface , one end of the second electrostatic tube and one end of the first resistor are connected to the A5 signal terminal of the first interface, one end of the third electrostatic tube and one end of the second resistor are connected to the first interface connected to the B5 signal terminal of the first interface, the A5 signal terminal and the B5 signal terminal of the first interface are also connected to the logic control module, the other end of the first electrostatic tube, the other end of the second electrostatic tube, the The other end of the third electrostatic tube, the other end of the first resistor and the other end of the second resistor are all grounded; one end of the fourth electrostatic tube is connected to the A6 and B6 signal terminals of the first interface, so The A6 and B6 signal ends of the first interface are also connected to the transformation unit, the other end of the fourth electrostatic tube is grounded; one end of the fifth electrostatic tube is connected to the A7 and B7 signal ends of the first interface connected, the A7 and B7 signal ends of the first interface are also connected to the transformation unit, the other end of the fifth electrostatic tube is grounded; one end of the first capacitor, one end of the second capacitor, and the One end of the transient diode and one end of the third resistor are all connected to the A9 signal end of the first interface, the A9 signal end of the first interface is also connected to the power supply, and the other end of the third resistor is connected to the One end of the fourth resistor and one end of the third capacitor are connected to the second transmission module, the other end of the first capacitor, the other end of the second capacitor, the other end of the transient diode, the The other end of the fourth resistor and the third capacitor are grounded.
The bidirectional charging circuit according to claim 8, wherein the voltage transformation unit includes a fifth resistor, a sixth resistor and a transformer; the first pin of the transformer is connected to one end of the sixth resistor, so The fourth pin of the transformer is connected to the other end of the sixth resistor and the second transmission module, the second pin of the transformer is connected to one end of the fifth resistor and the second transmission module, The third pin of the transformer is connected to the other end of the fifth resistor.
The bidirectional charging circuit according to claim 9, wherein the control unit includes a logic control chip, a seventh resistor, an eighth resistor, and a fourth capacitor, and the first pin and the second pin of the logic control chip are both Connected to the first transmission module, the 7th pin, 8th pin, 9th pin and 11th pin of the logic control chip are all connected to the pull-up unit, and the 9th pin of the logic control chip is also connected to the The second transmission module is connected to the pull-up unit; one end of the seventh resistor is connected to the sixth pin of the logic control chip and one end of the fourth capacitor, and the other end of the seventh resistor is connected to The 12th pin of the logic control chip is connected to the power supply; the eighth resistor is connected to the 5th pin and the 12th pin of the logic control chip, and the 12th pin of the logic control chip is also connected to the power supply.
The bidirectional charging circuit according to claim 9, wherein the pull-up unit includes a ninth resistor, a tenth resistor, an eleventh resistor, and a twelfth resistor, one end of the ninth resistor, the first One end of the tenth resistor, one end of the eleventh resistor and one end of the twelfth resistor are all connected to the power port, the other end of the ninth resistor, the other end of the tenth resistor, the tenth resistor The other end of the first resistor and the other end of the twelfth resistor are both connected to the second transmission module.
The bidirectional charging circuit according to claim 6, wherein the bidirectional charging circuit further comprises an interface module, the interface module is connected to the first transmission module, the power supply module and the logic control module, so that The interface module is used to output the first current detection signal and the second current detection signal output by the logic control module to the main control module.
The bidirectional charging circuit according to claim 8, wherein the power module includes a power control unit and a battery pack; the power control unit is connected to the main control module, the first transmission module and the battery pack connected; the battery control unit is used to control the battery pack to provide reverse current according to the first control information, and to control the battery pack to receive charging current to charge the battery pack itself according to the second control information; the battery pack uses Used to provide current to external electronic devices or receive current from a power adapter.
The bidirectional charging circuit according to claim 16, wherein the power control unit is an RK816 chip.
The bidirectional charging circuit according to claim 10, wherein the main control chip is an RK3229 chip.
The bidirectional charging circuit according to claim 6, wherein the first detection information is a low-level signal, the second detection information is a high-level signal; the first control information is downlink port mode information Or plug and play mode information; the second control information is uplink port mode information.
A bidirectional charging device, comprising a PCB, characterized in that the PCB is provided with the bidirectional charging circuit according to any one of claims 6-14.