CN112260348A

CN112260348A - Charging control circuit and charging equipment

Info

Publication number: CN112260348A
Application number: CN202011060238.5A
Authority: CN
Inventors: 郑斌; 李萍; 江甫
Original assignee: Anker Innovations Co Ltd
Current assignee: Anker Innovations Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-01-22
Anticipated expiration: 2040-09-30
Also published as: WO2022068397A1; CN112260348B

Abstract

A charging control circuit and a charging device are disclosed. The charge control circuit includes: the power supply comprises a power supply conversion module, a first output circuit, a second output circuit, a first branch circuit and a second branch circuit, wherein the first branch circuit and the second branch circuit are electrically connected with the first output circuit and the power supply conversion module in parallel, and the power supply further comprises a control unit which is used for detecting the output current of the first output circuit and controlling the first branch circuit to be disconnected and controlling the second branch circuit to be connected when the output current is smaller than a current threshold value. Therefore, the charging control circuit in the embodiment of the invention is provided with the first branch circuit and the second branch circuit, and controls the on/off of the first branch circuit and the second branch circuit based on the output current of the first output circuit, and the scheme can correctly detect the charging state of the equipment at the first output circuit according to the output current of the first output circuit, and further determine the normal charging of the equipment through the power transmission control of the first output circuit.

Description

Charging control circuit and charging equipment

Technical Field

The present disclosure relates to electronic devices, and particularly to a charging control circuit and a charging device.

Background

In order to meet the charging requirements of more portable electronic devices, the power adapter and the charger can be provided with at least two charging interfaces, so that a plurality of electronic devices can be charged simultaneously. When the adapter works, the state of the connection equipment of each charging interface needs to be accurately judged, and then power distribution can be carried out more optimally.

Most charging interfaces of apple devices are lightning (lightning) interfaces, and in order to charge the apple devices, the apple devices need to be connected to the charging interfaces through conversion lines. For example, the apple device may be connected to the USBA interface of the charger for charging via the USBA to Lighting line.

However, since the electronic circuit is present in the flash cord and becomes more and more complex for the safety of the device and the charging process, at present, for the device connected by the flash cord, sometimes the charging state of the device cannot be accurately detected due to the failure of the electronic circuit, and further the device cannot be normally charged.

Disclosure of Invention

The invention provides a charging control circuit and charging equipment.

In a first aspect, a charge control circuit is provided, including: a power conversion module, a first output circuit and a second output circuit, a first branch and a second branch, wherein the first branch and the second branch are electrically connected with the first output circuit and the power conversion module in parallel,

the control unit is used for detecting the output current of the first output circuit and controlling the first branch circuit to be disconnected and the second branch circuit to be connected when the output current is smaller than a current threshold value.

In one embodiment, the control unit is further configured to: and when the output current is greater than or equal to the current threshold, controlling the first branch circuit to be connected and controlling the second branch circuit to be disconnected.

In one embodiment, the control unit is further configured to: when the output current is greater than or equal to the current threshold, determining a first required voltage of a first device to which the first output circuit is connected and a second required voltage of a second device to which the second output circuit is connected; and determining a first output voltage of the power conversion module according to the first demand voltage and the second demand voltage.

In one embodiment, before controlling the first branch to be conducted, the control unit is further configured to: controlling the first output voltage to be equal to or less than the smaller of the first demand voltage and the second demand voltage.

In one embodiment, the control unit is further configured to: determining a second required voltage of a second device to which the second output circuit is connected when the output current is less than the current threshold; and determining a second output voltage of the power conversion module according to the second required voltage.

In one embodiment, the second branch comprises a dc-dc module, and the control unit is further configured to: and when the output current is smaller than the current threshold, controlling the output voltage of the direct current-direct current module to be equal to the voltage required by the first output circuit.

In one embodiment, the output power of the second output circuit is updated if the change in the output current to less than the current threshold is further detected.

In one embodiment, the first branch circuit includes a first switch module, the second branch circuit includes a dc-dc module and a second switch module electrically connected, the first output circuit includes a first interface or the first output circuit includes a first interface and a flash line, and the second output circuit includes a second interface, where the second interface is an interface meeting a power supply transmission PD protocol.

In a second aspect, there is provided a charging device comprising: the charging control circuit of the first aspect or any embodiment thereof.

In one embodiment, the charging device is a charger or a mobile power supply.

Therefore, the charging control circuit in the embodiment of the invention is provided with the first branch circuit and the second branch circuit, and controls the on/off of the first branch circuit and the second branch circuit based on the output current of the first output circuit, and the scheme can correctly detect the charging state of the equipment at the first output circuit according to the output current of the first output circuit, and further determine the normal charging of the equipment through the power transmission control of the first output circuit.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail embodiments of the present invention with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings, like reference numbers generally represent like parts or steps.

FIG. 1 is a schematic block diagram of a charge control circuit of an embodiment of the present invention;

FIG. 2 is another schematic block diagram of a charge control circuit of an embodiment of the present invention;

FIG. 3 is a schematic flow chart of a method for controlling branch on/off by the control unit according to the embodiment of the present invention;

fig. 4 is a schematic flow chart of a method for a control unit to implement power transmission control according to an embodiment of the present invention.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

In the following description, for purposes of explanation, specific details are set forth in order to provide a thorough understanding of the present invention. It is apparent that the practice of the invention is not limited to the specific details set forth herein as are known to those of skill in the art. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to the detailed description and should not be construed as limited to the embodiments set forth herein.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, as the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. When the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The terms "upper", "lower", "front", "rear", "left", "right" and the like as used herein are for purposes of illustration only and are not limiting.

Ordinal words such as "first" and "second" are referred to herein merely as labels, and do not have any other meaning, such as a particular order, etc. Also, for example, the term "first component" does not itself imply the presence of "second component", and the term "second component" does not itself imply the presence of "first component".

For charging different electronic devices, the charging device is equipped with at least two charging interfaces, such as a first charging interface and a second charging interface.

For convenience in the following description, it is assumed that the first charging interface is a Type-a interface and the second charging interface is a Type-C interface. The first charging interface may also be referred to as an usb a interface, and generally conforms to a Quick Charge (QC) protocol. For example, high-pass QC can support up to 5V2A (10W), which is a more common fast-fill scheme. The second charging interface may also be referred to as a PD interface, which generally conforms to a Power Delivery (PD) protocol. The PD protocol is a fast charging standard developed by the standardization organization of Universal Serial Bus (USB) and capable of supporting both power transmission and data communication of up to 100W in one cable.

In the charging device combining the USBA interface and the PD interface, in order to provide faster charging power and better user experience, the charging device needs to accurately determine the operating state of the USBA interface when operating. When the USBA interface has the electronic equipment inserted, the full power is distributed to quickly charge the electronic equipment connected with the USBA interface. When the electronic equipment of the USBA interface is pulled out, the power is redistributed to other charging interfaces (such as a PD interface) so as to achieve reasonable utilization of the power. Thereafter, when the USBA interface is again plugged into the electronic device, it is desirable to be able to accurately recognize the insertion of the electronic device and redistribute power to the USBA interface.

The apple device generally has a lightning (lightning) interface, and in order to charge the apple device by using the charging device, a lightning line is required for connection. The Lightning line may be an apple charging line including an MFi authentication circuit. One way To charge apple appliances is To use the USBA To Lightning (USBA To Lightning) line, referred To as A2L line for short. Specifically, the USBA end of the A2L line may be connected to the USBA interface of the charging apparatus, and the lightning end of the A2L line may be connected to the lightning interface of the apple device.

However, since the A2L line itself has electronic circuitry, when the A2L line is connected to the USBA interface, the user unplugs the apple device connected to the lightning end of the A2L line, and if the apple device is inserted again at the lightning end of the A2L line, the insertion cannot be accurately identified. This may result in the charging device not being able to reasonably implement power distribution on the USBA interface and the PD interface.

In order to solve the above problem, the present application provides a charge control circuit, as shown in fig. 1. The charging control circuit comprises a power conversion module 10, a first output circuit 21, a second output circuit 31, a first branch circuit 41, a second branch circuit 51 and a control unit 71.

The first branch 41 is electrically connected to the power conversion module 10 and the first output circuit 21, the second branch 51 is electrically connected to the power conversion module 10 and the first output circuit 21, and the first branch 41 and the second branch 51 may be connected in parallel.

Wherein the control unit 71 may detect the output current of the first output circuit and further control the on/off of the first branch and the second branch according to the high output current.

Specifically, in one embodiment, the first branch 41 is controlled to be off and the second branch 51 is controlled to be on when the output current is less than the current threshold. In another embodiment, the first branch 41 is controlled to be on and the second branch 51 is controlled to be off when the output current is greater than or equal to the current threshold.

In one implementation, as shown in fig. 2, the first output circuit 21 may include a first interface 20. Alternatively, the first output circuit 21 may include a first interface 20 and a lightning line connected to the first interface 20. The second output circuit 31 may include a second interface 30, and referring to fig. 2, the second interface 30 is electrically connected (e.g., via a power line) to the power conversion module 10, and a first branch 41 and a second branch 51 are connected between the power conversion module 10 and the first interface 20.

The first branch comprises a first switching module 40, which may be used to enable on/off of the first branch. The first switch module 40 may have two different states, and in one state of the first switch module 40, the first branch is turned on, that is, the power conversion module 10 is electrically connected to the first interface 20; in another state of the first switching module 40, the first branch is disconnected, i.e. the power conversion module 10 is disconnected from the first interface 20.

The second branch includes a direct current to direct current (DC-DC) module 50 and a second switching module 60 connected in series. The second switching module 60 may have two different states to enable on/off of the second branch. In one state of the second switching module 60, the second branch is turned on, i.e. the power conversion module 10 is electrically connected with the first interface 20 via the DC-DC module 50; in another state of the second switch module 60, the second branch is disconnected, i.e. the power conversion module 10 is disconnected from the first interface 20.

As shown in fig. 1 and 2, the first branch 41 and the second branch 51 are connected in parallel, and the power conversion module 10 is connected to the first interface 20 through the first branch when the first switch module 40 is turned on. When the first switch module 40 is turned off and the second switch module 60 is turned on, the power conversion module 10 is connected to the first interface 20 through the second branch.

It is understood that the power conversion module 10 is capable of providing power to the second interface 30. In a state where the first switch module 40 is turned on and the second switch module 60 is turned off, the power conversion module 10 can provide power to the first interface 20. In a state where the first switching module 40 is turned off and the second switching module 60 is turned on, the DC-DC module 50 can supply power to the first interface 20.

The first interface 20 may be a usb a interface, and the second interface 30 may be a PD interface, such as a Type-C interface.

The first switch module 40 and the second switch module 60 may be the same or different electronic devices. For example, both of them are Field Effect Transistors (FETs), such as Metal-Oxide Semiconductor Field Effect transistors (MOS-FETs). Of course, the switch module may also be in other device forms, which is not limited in this application.

The DC-DC module 50 can be configured as a low-cost DC-DC module, and only needs to output a small current (e.g., less than 100 mA). Thus, the cost of the entire charge control circuit can be reduced.

Illustratively, as shown in fig. 2, the control Unit 70 may include a Micro-Controller Unit (MCU) 70. The MCU 70 is connected to the first interface 20, the second interface 30, the first switching module 40 and the second switching module 60. In this application, the MCU 70 may also be referred to as a protocol chip, which may be a chip capable of modulating and demodulating protocol functions such as QC and/or PD in the charging control circuit.

In one aspect, the MCU 70 is capable of detecting current and/or voltage at the first interface 20 and the second interface 30; on the other hand, the MCU 70 can realize control (switching) of the states of the first and

second switching modules

40 and 60. As described in detail below in connection with fig. 3 and 4.

It will be appreciated that fig. 1 and 2 show the control connections between MCU 70 and the various other modules in dotted lines for distinction from the lines of power transmission.

In addition, it should also be understood that although various modules of the charge control circuit are shown in fig. 1 and 2, the present application is not limited thereto, and other modules may also be included on the basis of fig. 1 and 2, for example. For example, a greater number of interfaces similar to the first interface 20 and/or the second interface 30 may be included. For example, a temperature protection circuit may be included to prevent accidents due to excessive temperatures.

A process of the power transmission control by the control unit in the present application will be described below with reference to fig. 3 to 4. Fig. 3 is a schematic flowchart of a method for controlling branch on/off by a control unit according to an embodiment of the present invention. The method may be performed by the control unit 71 in fig. 1, or specifically may be performed by the MCU 70 shown in fig. 2, the method shown in fig. 3 comprising:

s10, detecting an output current of the first output circuit;

and S20, when the output current is smaller than the current threshold, controlling the first branch to be disconnected and controlling the second branch to be connected.

Illustratively, in conjunction with fig. 2, S10 may be embodied as detecting an operating current at the first interface. Accordingly, S20 may be that in case the operating current is less than the current threshold, the first switch module is controlled to be turned off and the second switch module is controlled to be turned on.

In case the output current is smaller than the current threshold, specifically: the output voltage of the dc-dc module 50 is controlled to be equal to the voltage required by the first output circuit.

Still referring to fig. 2, a flasher line may be connected to the first interface 20 but the first device to be charged is not connected, and at this time, the detected operating current at the first interface 20 is less than the threshold current, but due to the electronic circuit in the flasher line, the operating current is not all zero, that is, the first output circuit has a required voltage, and then the output voltage of the dc-dc module 50 may be controlled to meet the required voltage of the first output circuit.

Exemplarily, in another case, after S10, S30 may be further included: and when the output current is greater than or equal to the current threshold, controlling the first branch circuit to be conducted and controlling the second branch circuit to be disconnected.

With reference to fig. 2, S30 may specifically be configured to control the first switch module to be turned on and the second switch module to be turned off when the operating current at the first interface is greater than or equal to a current threshold.

Therefore, in the embodiment of the invention, the first interface is not completely in the power-off state by arranging the first switch module and the second switch module. And then, the working current at the first interface can be detected in real time, and the power transmission control of the first interface is realized by controlling the states of the first switch module and the second switch module.

Exemplarily, in S10, the MCU 70 may detect the operating current at the first interface 20 in real time, which is assumed to be a 0.

Assuming that the current threshold is denoted as Ath, S10 may then compare the operating current a0 to the current threshold Ath. If A0 is not less than Ath, executing S30; on the contrary, if a0< Ath, S20 is performed.

The specific value of the current threshold is not limited in the present application, and may be set according to factors such as the QC protocol and the power consumption of the electronic circuit in the A2L line. As an example, the current threshold may be 100 mA.

It can be understood that if A0 ≧ Ath, it indicates that the first device to be charged is connected at the first interface.

Illustratively, in S30, the first switch module is turned on, so that the power conversion module can provide power to the first interface through the first branch.

In one example, the MCU may detect whether a second device is connected to the second interface, and if the second device is not present at the second interface, that is, the second interface is idle, then after S30, the first device at the first interface may also be charged. Specifically, a first required voltage of the first device may be determined, and the output voltage of the power conversion module is controlled to be equal to the first required voltage, so that high-power charging of the first device at the first interface is achieved.

In one example, the MCU may detect whether a second device is connected at the second interface, and if the second device is present at the second interface, then after S30, power allocation may also be performed for the first device at the first interface and the second device at the second interface. Specifically, a first required voltage of a first device connected at the first interface may be determined, and a second required voltage of a second device connected at the second interface may be determined; and determining a first output voltage of the power conversion module according to the first demand voltage and the second demand voltage.

Wherein the first output voltage may be equal to or less than the smaller of the first demand voltage and the second demand voltage. Specifically, when the output current is greater than or equal to the current threshold, before controlling the first branch to be conducted, the method further includes controlling the first output voltage of the power conversion module to be equal to or less than the smaller of the first demand voltage and the second demand voltage. That is to say, the first output voltage of the power conversion module can be adjusted first, and then the first branch circuit is conducted, so that damage to a circuit or equipment due to overlarge voltage can be prevented, charging safety is ensured, and the service life of each device is prolonged.

As an example, the first output voltage may be equal to the smaller of the first demand voltage and the second demand voltage. For example, assuming that the first required voltage is 5V and the second required voltage is 9V, it may be determined that the first output voltage of the power conversion module is equal to 5V. Therefore, high-power charging can be performed on the first equipment at the USBA interface, and quick charging is realized. Further, Power Data Object (PDO) information of the second interface may be further set, thereby charging the second device. The PDO information may be a data packet containing voltage, current, power, etc. information; for example, the PDO information at the second interface may include a voltage of 5V, a current of 3A. That is, in this example, the charging power to charge the second device at the second interface is 15W.

It will be appreciated that during simultaneous powering of the first interface and the second interface using the first output voltage, the output power of the second output circuit may be updated at this time if a further change in the output current to less than the current threshold is detected, for example a decrease in the operating current at the first interface and a decrease to less than the current threshold is detected. Specifically, when the output current is further detected to be changed to be smaller than the current threshold value, the first branch circuit is controlled to be disconnected and the second branch circuit is controlled to be connected, and the output power of the second output circuit is updated by controlling the output voltage of the power conversion module.

Illustratively, the updated output power of the second output circuit may be equal to the smaller of (a) a rated power required by a second device to which the second output circuit is connected and (b); (b) the maximum output power of the power conversion module, or (b) the maximum output power of the power conversion module minus the power required by the first output circuit.

Illustratively, in S20, the second switch module is turned on and the first switch module is turned off, so that the power conversion module can provide power to the first interface through the second branch.

It can be understood that when the working current at the first interface drops from ≥ Ath to < Ath, it indicates that the first device at the first interface is pulled out or the first device is fully charged, and at this time, it is not necessary to output a high-power current to the first interface, so that the second switch module can be turned on, the first switch module is turned off, and the DC/DC module supplies a low-current power.

In case of S20, if a second device is connected at the second interface, after S20, it may include: determining a second required voltage of a second device connected at a second interface; and determining a second output voltage of the power conversion module according to the second required voltage.

In particular, the second output voltage may be equal to the second demand voltage, e.g. the second output voltage is equal to 9V. Further, the PDO information of the second interface may be further set, so as to perform high-power charging for the second device. The PDO information may be a data packet containing voltage, current, power, etc. information.

Therefore, in the embodiment of the invention, by arranging the first switch module and the second switch module, the first interface is not completely in the power-off state, and the charging state of the first device connected at the first interface can be determined according to the working current at the first interface. Therefore, power distribution among the multiple charging interfaces can be further realized based on the detected working current, and more accuracy and efficiency of power configuration are ensured.

A specific example is given below to describe the method for charging the device in the present application, and it is assumed that the initial state of the specific example is: the second interface (PD interface) is connected with a second device, and the first interface is idle and is not connected with any device.

It can be understood that in this initial state, the operating current a0< Ath at the first interface, so the MCU controls the first switch module to be turned off, the second switch module to be turned on, and the DC/DC module supplies a small current to the first interface.

After this, if the user plugs in the first device at the first interface, for example, the user may plug in the A2L line to the first interface, and the other end of the A2L line is connected to the apple device to be charged; or for example the user directly inserts the first device at the first interface.

Due to the insertion action of a user, the working current of the first interface is detected to be increased instantly, namely A0 is larger than or equal to Ath, so that the MCU controls the state of the switch module to be changed, namely the first switch module is controlled to be switched on, the second switch module is controlled to be switched off, and the power supply conversion module supplies power to the first interface.

And at this moment, because the second interface is also connected with the second equipment, power distribution is carried out according to the first required voltage of the first equipment and the second required voltage of the second equipment so as to realize quick charging.

In one implementation, after that, if the user unplugs the first device, for example, the user unplugs the apple device being charged, the A2L line remains connected at the first interface; for another example, the user unplugs the first device and no more devices or wires are connected at the first interface.

Due to the unplugging operation of the user, it is detected that the operating current at the first interface drops below the current threshold, i.e. a0< Ath, it is understood that the operating current at the first interface may be substantially zero at this time, or the operating current at the first interface may not be zero due to the fact that the A2L line (electronic circuit is present in the flash line) is still connected at the first interface. Therefore, the MCU can control and change the state of the switch modules, namely, the first switch module is controlled to be switched off, the second switch module is controlled to be switched on, and the DC/DC module supplies power for the first interface with low current. This state is similar to the initial state described above and will not be described in detail here.

In another implementation, after that, if the apple device is fully charged, that is, it no longer needs high-power charging, it is also detected that the operating current at the first interface drops to be less than the current threshold, that is, a0< Ath, so the MCU controls to change the states of the switch modules, that is, controls the first switch module to be turned off, and controls the second switch module to be turned on, and the DC/DC module supplies a low-current power to the first interface. This state is similar to the initial state described above and will not be described in detail here.

In addition, it can be appreciated that since the MCU detects the operating current at the first interface in real time, the above process may be looped as the user inserts/removes the first device.

Therefore, the working current at the first interface is detected in real time, the plug/unplug change of the first equipment at the first interface can be identified in time, and the power distribution among the interfaces is further adjusted based on the plug/unplug change of the first equipment at the first interface, so that the power distribution scheme can be more reasonable and accurate, and the user experience is remarkably improved.

The embodiment of the invention also provides the charging equipment. The charging device may include the charging control circuit described above as shown in fig. 1 or fig. 2.

Illustratively, the charging device may be a charger or may be a mobile power supply.

Exemplarily, the charging device comprises a control unit, such as the aforementioned MCU or protocol chip. The charging device may further include a memory on which a computer program is stored, the computer program being executable by the control unit to implement the above-described process of power transmission control.

The memory may be a non-volatile storage medium for storing current thresholds, computer programs executed by the processor, and the like. Exemplary may include, but are not limited to, Read-Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), or Flash Memory (Flash Memory), such as any of the following: embedded multimedia cards (EMMC), Nor Flash, Nand Flash, and the like.

Illustratively, the memory may further include a volatile storage medium for storing the first required voltage, the second required voltage, and the like. Exemplary may include, but are not limited to, Random Access Memory (RAM), Static Random Access Memory (Static RAM, SRAM), Dynamic Random Access Memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, DDR SDRAM), DDR2, DDR3, Enhanced Synchronous SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Direct bus RAM (DR RAM), and the like.

Furthermore, according to an embodiment of the present invention, a computer storage medium is also provided, on which program instructions are stored, and when the program instructions are executed by a computer or a processor, the program instructions are used for executing the corresponding steps of the method shown in fig. 3 or fig. 4. The computer storage medium may be a computer-readable storage medium, and may include, for example, a memory card of a smart phone, a storage component of a tablet computer, a hard disk of a personal computer, a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), a portable compact disc read only memory (CD-ROM), a USB memory, or any combination of the above storage media.

In one embodiment, the program instructions, when executed by the computer or processor, enable the computer or processor to: detecting the output current of a first output circuit, and controlling a first branch circuit shown in fig. 1 to be disconnected and a second branch circuit to be connected when the output current is smaller than a current threshold value; and when the output current is greater than or equal to the current threshold, controlling the first branch circuit to be connected and controlling the second branch circuit to be disconnected.

In addition, the embodiment of the present invention also provides a computer program code, which can be executed by a processor, and when being executed by the processor, can implement the corresponding steps of the method shown in fig. 3 or fig. 4.

In one embodiment, the code, when executed by the processor, enables the processor to: detecting the output current of a first output circuit, and controlling a first branch circuit shown in fig. 1 to be disconnected and a second branch circuit to be connected when the output current is smaller than a current threshold value; and when the output current is greater than or equal to the current threshold, controlling the first branch circuit to be connected and controlling the second branch circuit to be disconnected.

Therefore, in the embodiment of the invention, the charging control circuit is provided with the first branch circuit and the second branch circuit, and the on/off of the first branch circuit and the second branch circuit is controlled based on the output current of the first output circuit, the charging state of the device at the first output circuit can be correctly detected according to the output current of the first output circuit, and the normal charging of the device is determined through the power transmission control of the first output circuit. Specifically, the charge control circuit may be provided with a first switch module and a second switch module, so that the first interface may not be completely in a power-off state. Furthermore, the working current at the first interface is detected in real time, the plug/unplug change of the first equipment at the first interface can be identified in time, and the power distribution among the interfaces is further adjusted based on the plug/unplug change of the first equipment at the first interface, so that the power distribution scheme can be more reasonable and accurate, and the user experience is remarkably improved.

Although the illustrative embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the foregoing illustrative embodiments are merely exemplary and are not intended to limit the scope of the invention thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention. All such changes and modifications are intended to be included within the scope of the present invention as set forth in the appended claims.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the invention and aiding in the understanding of one or more of the various inventive aspects. However, the method of the present invention should not be construed to reflect the intent: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some of the modules in the charging device according to embodiments of the present invention. The present invention may also be embodied as apparatus programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

The above description is only for the specific embodiment of the present invention or the description thereof, and the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the protection scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A charge control circuit, comprising: a power conversion module, a first output circuit and a second output circuit, a first branch and a second branch, wherein the first branch and the second branch are electrically connected with the first output circuit and the power conversion module in parallel,

2. The charge control circuit of claim 1, wherein the control unit is further configured to:

and when the output current is greater than or equal to the current threshold, controlling the first branch circuit to be connected and controlling the second branch circuit to be disconnected.

3. The charge control circuit of claim 2, wherein the control unit is further configured to:

when the output current is greater than or equal to the current threshold, determining a first required voltage of a first device to which the first output circuit is connected and a second required voltage of a second device to which the second output circuit is connected;

and determining a first output voltage of the power conversion module according to the first demand voltage and the second demand voltage.

4. The charge control circuit of claim 3, wherein the control unit, before controlling the first branch to conduct, is further configured to:

controlling the first output voltage to be equal to or less than the smaller of the first demand voltage and the second demand voltage.

5. The charge control circuit of claim 1, wherein the control unit is further configured to:

determining a second required voltage of a second device to which the second output circuit is connected when the output current is less than the current threshold;

and determining a second output voltage of the power conversion module according to the second required voltage.

6. The charge control circuit of claim 1 or 5, wherein the second branch comprises a DC-DC module, and the control unit is further configured to:

and when the output current is smaller than the current threshold, controlling the output voltage of the direct current-direct current module to be equal to the voltage required by the first output circuit.

7. The charge control circuit of claim 3 or 4, wherein the output power of the second output circuit is updated if the change in the output current to less than the current threshold is further detected.

8. The charging control circuit of claim 1, wherein the first branch comprises a first switch module, the second branch comprises a dc-dc module and a second switch module electrically connected, the first output circuit comprises a first interface or the first output circuit comprises a first interface and a flash line, and the second output circuit comprises a second interface, wherein the second interface is an interface meeting a PD protocol for power transmission.

9. A charging device, comprising:

the charge control circuit of any of the preceding claims 1 to 8.

10. The charging device of claim 9, wherein the charging device is a charger or a mobile power source.