CN112260348B

CN112260348B - Charging control circuit and charging equipment

Info

Publication number: CN112260348B
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: 2023-11-17
Anticipated expiration: 2040-09-30
Also published as: CN112260348A; WO2022068397A1

Abstract

A charge control circuit and a charging device are disclosed. The charge control circuit includes: the power supply device comprises a power supply conversion module, a first output circuit, 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 supply conversion module in parallel, and the power supply device further comprises a control unit which is used for detecting the output current of the first output circuit and controlling the first branch to be disconnected and controlling the second branch to be connected when the output current is smaller than a current threshold value. Therefore, the charging control circuit in the embodiment of the application is provided with the first branch and the second branch, and controls the on-off of the first branch and the second branch based on the output current of the first output circuit.

Description

Charging control circuit and charging equipment

Technical Field

The present application relates to the field of electronic devices, and in particular, to a charging control circuit and a charging device.

Background

To meet the charging requirements of more portable electronic devices, the power adapter and charger may be provided with at least two charging interfaces, thereby enabling simultaneous charging of multiple electronic devices. When the adapter works, the state of the connection device of each charging interface needs to be accurately judged, so that power distribution can be performed more optimally.

The charging interface of most apple devices is a lightning (lightning) interface, which needs to be connected to the charging interface by a conversion wire in order to charge it. For example, the apple device may be charged by connecting the apple device to the USBA interface of the charger via a USBA to Lighting line.

However, since the electronic circuit exists in the flashline itself, and the electronic circuit becomes more and more complicated for the safety of the device and the charging process, the charging state of the device cannot be accurately detected due to the fact that the electronic circuit cannot work, and thus the device cannot be normally charged, in the case of the device connected through the flashline.

Disclosure of Invention

The application provides a charging control circuit and charging equipment.

In a first aspect, there is provided a charge control circuit comprising: the power supply conversion module, the first output circuit, the second output circuit, the first branch circuit and the 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,

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

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

In an 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 connected to the first output circuit and a second required voltage of a second device connected to the second output circuit; and determining a first output voltage of the power conversion module according to the first demand voltage and the second demand voltage.

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

In an 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 an 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 value, 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 output current change is further detected to be less than the current threshold.

In one embodiment, the first branch comprises a first switch module, the second branch comprises a dc-dc module and a second switch module which are electrically connected, the first output circuit comprises a first interface or the first output circuit comprises a first interface and a lightning line, and the second output circuit comprises a second interface, wherein the second interface is an interface meeting a power transfer PD protocol.

In a second aspect, there is provided a charging apparatus including: the charge 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 application is provided with the first branch and the second branch, and controls the on-off of the first branch and the second branch based on the output current of the first output circuit.

Drawings

The above and other objects, features and advantages of the present application will become more apparent from the following more particular description of embodiments of the present application, as illustrated in the accompanying drawings. The accompanying drawings are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate the application and together with the embodiments of the application, and not constitute a limitation to the application. In the drawings, like reference numerals generally refer to like parts or steps.

Fig. 1 is a schematic block diagram of a charge control circuit according to an embodiment of the present application;

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

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

fig. 4 is a schematic flow chart of a method of implementing power transmission control by the control unit according to an embodiment of the present application.

Detailed Description

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

In the following description, a detailed structure will be presented for the purpose of thoroughly understanding the present application. It will be apparent that the application is not limited to the specific details set forth in the skilled artisan. Preferred embodiments of the present application are described in detail below, however, the present application may have other embodiments in addition to these detailed descriptions, 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 application, as the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and/or "including," when used in this specification, 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 are used herein for illustrative purposes only and are not limiting.

Ordinal numbers such as "first" and "second" cited in the present application are merely identifiers and do not have any other meaning, such as a particular order or the like. Also, for example, the term "first component" does not itself connote the presence of "second component" and the term "second component" does not itself connote the presence of "first component".

In order to charge different electronic devices, the charging device is provided with at least two charging interfaces, such as a first charging interface and a second charging interface.

For convenience of 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 a USBA interface, which generally conforms to the Quick Charge (QC) protocol. For example, high-pass QC can support up to 5V2A (10W), which is a more common fast-charging scheme. The second charging interface may also be referred to as a PD interface, which generally conforms to the Power Delivery (PD) protocol. The PD protocol is a fast charging standard introduced by the standardization organization for universal serial buses (Universal Serial Bus, USB) capable of supporting power transmission and data communication up to 100W simultaneously in one cable.

In the charging device with the combination of the USBA interface and the PD interface, in order to provide faster charging power and better use experience for users, the charging device needs to accurately judge the working state of the USBA interface during working. And when the electronic equipment is plugged in the USBA interface, distributing full power to rapidly charge the electronic equipment connected to the USBA interface. And 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 plugged into the electronic device again, it is necessary to be able to accurately identify the plugging into the electronic device and redistribute power to the USBA interface.

Apple devices typically have a lightning (lightning) interface, which requires a connection using a lightning line in order to charge the apple device using the charging device described above. The Lightning line may be an apple charging line including an MFi authentication circuit. One way to charge apple devices is to use the USBA to lightning (USBA To Lightning) line, abbreviated as A2L line. Specifically, the USBA end of the A2L line may be connected to the USBA interface of the charging device, and the lightning end of the A2L line may be connected to the lightning interface of the apple device.

However, since the electronic circuit exists in the A2L line itself, when the A2L line is connected to the USBA interface, after the user pulls out the apple device connected to the lightning end of the A2L line, if the apple device is inserted again into the lightning end of the A2L line, the insertion cannot be accurately recognized at this time. This may result in the charging device not reasonably achieving power distribution over the USBA interface and the PD interface.

In order to solve the above problems, the present application provides a charge control circuit as shown in fig. 1. The charge control circuit comprises a power conversion module 10, a first output circuit 21 and a second output circuit 31, a first branch 41 and a second branch 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 and second branches according to the high output current.

Specifically, in one embodiment, the first branch 41 is controlled to be turned off and the second branch 51 is controlled to be turned on when the output current is less than the current threshold. In another embodiment, the first branch 41 is controlled to be turned on and the second branch 51 is controlled to be turned 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 realize 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 comprises 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 realize on/off of the second branch. In one state of the second switch module 60, the second branch is turned on, i.e. the power conversion module 10 is electrically connected to the first interface 20 via the DC-DC module 50; in another state of the second switching 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 with the first interface 20 through the first branch in the case where the first switching module 40 is turned on. With the first switching module 40 open and the second switching module 60 on, the power conversion module 10 is connected to the first interface 20 through the second branch.

It is appreciated that the power conversion module 10 is capable of providing power to the second interface 30. The power conversion module 10 is capable of providing power to the first interface 20 in a state in which the first switching module 40 is on and the second switching module 60 is off. The DC-DC module 50 is capable of providing power to the first interface 20 in a state in which the first switching module 40 is turned off and the second switching module 60 is turned on.

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

Wherein the first switch module 40 and the second switch module 60 may be the same or different electronic devices. As an example, both are field effect transistors (Field Effect Transistor, FETs), such as Metal-oxide semiconductor field effect transistors (Metal-Oxide Semiconductor FETs, MOS-FETs). Of course, the switch module may be in other device forms, which the present application is not limited to.

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

For example, 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 the present application, the MCU 70 may also be referred to as a protocol chip, which may be a chip capable of modulating and demodulating the protocol functions of 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 switch 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 control connections between the MCU 70 and the other various modules in dotted lines for distinguishing from the lines of power transmission.

In addition, it should also be understood that although the respective modules of the charge control circuit are shown in fig. 1 and 2, the present application is not limited thereto, and other modules may 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 control unit in the present application for power transmission control will be described below with reference to fig. 3 to 4. Fig. 3 is a schematic flow chart of a method for controlling on-off of a branch by a control unit according to an embodiment of the present application. The method may be performed by the control unit 71 in fig. 1, or in particular by the MCU 70 shown in fig. 2, the method shown in fig. 3 comprising:

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

and S20, when the output current is smaller than the current threshold value, the first branch circuit is controlled to be disconnected and the second branch circuit is controlled to be conducted.

By way of example, in connection with fig. 2, S10 may be embodied as detecting an operating current at the first interface. Accordingly, S20 may be to control the first switch module to be turned off and control the second switch module to be turned on when the operating current is less than the current threshold.

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

Still referring to fig. 2, a lightning wire may be connected to the first interface 20, but no first device to be charged is connected, and the operation current at the first interface 20 detected at this time is smaller than the threshold current, but the operation current is not all zero due to the electronic circuit in the lightning wire, i.e. 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.

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

Referring to fig. 2, S30 may specifically be controlling the first switch module to be turned on and controlling the second switch module to be turned off when the working current at the first interface is greater than or equal to the current threshold.

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

Illustratively, in S10, the MCU 70 may detect the operating current at the first interface 20 in real time, assumed to be A0.

Assuming that the current threshold is denoted Ath, S10 may be followed by comparing the operating current A0 with the current threshold Ath. If A0 is not less than Ath, S30 is executed; otherwise, if A0< Ath, S20 is performed.

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

It can be appreciated that if A0 is greater than or equal to Ath, it is illustrated that the first device to be charged is connected at the first interface.

Illustratively, in S30, the first switching module is turned on, such that the power conversion module is capable of providing power to the first interface through the first branch.

In one example, the MCU may detect whether the second device is connected to the second interface, and if the second device is not present at the second interface, i.e. 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 an output voltage of the power conversion module may be controlled to be equal to the first required voltage, thereby enabling high power charging of the first device at the first interface.

In one example, the MCU may detect whether the 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 a first interface may be determined, and a second required voltage of a second device connected at a 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 turned on, 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, the first output voltage of the power conversion module can be adjusted first, and then the first branch is conducted, so that damage to a circuit or equipment caused by 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. In this way, the first device at the USBA interface can be charged with high power, and quick charging is realized. Further, the power data object (Power Data Object, PDO) information of the second interface may be further set to charge the second device. The PDO information may be a data packet containing information such as voltage, current, power, etc.; 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 the use of the first output voltage to power both the first interface and the second interface, if further detection of a change in output current is made to be less than the current threshold, for example detection of a decrease in operating current at the first interface and a decrease to be less than the current threshold, then the output power of the second output circuit may be updated at this time. Specifically, when the change of the output current is further detected to be smaller than the current threshold value, the first branch is controlled to be opened and the second branch is controlled to be closed, 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) the power rating required for the second device to which the second output circuit is connected; (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 more than or equal to Ath to < Ath, it is indicated that the first device at the first interface is pulled out or the first device is fully charged, and no high-power current output is required to be performed to the first interface at this time, so that the second switch module can be turned on at this time, the first switch module is turned off, and the DC/DC module supplies low-current power.

In the case of S20, if the second device is connected at the second interface, after S20, it may include: determining a second required voltage for 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.

Specifically, the second output voltage may be equal to the second required voltage, for example, the second output voltage is equal to 9V. Further, 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 information such as voltage, current, power, etc.

Therefore, in the embodiment of the application, the first interface is not completely in the power-off state by arranging the first switch module and the second switch module, so that the charging state of the first equipment connected at the first interface can be determined according to the working current at the first interface. Therefore, the power distribution among the plurality of charging interfaces can be further realized based on the detected working current, and the more accurate and efficient power configuration is ensured.

A specific example will be given below to describe a method for charging a device in the present application, assuming 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 working current A0 at the first interface is < Ath, 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 the first interface with a small current.

After that, if the user inserts the first device at the first interface, for example, the user can insert an 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 inserts the first device directly at the first interface.

As the insertion action of the user can detect the instantaneous increase of the working current of the first interface, namely A0 is more than or equal to Ath, the MCU can control the state of the switch module to be changed, namely the first switch module is controlled to be conducted, and the second switch module is controlled to be disconnected, so that the power supply conversion module supplies power for the first interface.

At this time, since the second device is also connected to the second interface, power is distributed according to the first required voltage of the first device and the second required voltage of the second device, so as to achieve rapid charging.

In one implementation, after that, if the user pulls off the first device, e.g., the user pulls off the apple device that is being charged, the A2L line remains connected at the first interface; for another example, the user unplugs the first device and no device or line is connected at the first interface.

As a result of the user's pulling out operation, it is detected that the operating current at the first interface drops below the current threshold, i.e. A0< Ath, it being understood that the operating current at the first interface may be substantially zero at this time or that the operating current at the first interface is not zero due to the A2L line (the presence of electronic circuitry in the lightning line) still being connected. Therefore, the MCU can control the state of the switch modules to be changed, namely, the first switch module is controlled to be disconnected, the second switch module is controlled to be conducted, and the DC/DC module supplies power for the first interface in a small current mode. 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 charged fully, i.e. it no longer needs to be charged with high power, it is also detected that the working current at the first interface drops below the current threshold, i.e. A0< Ath, so the MCU will control to change the state of the switching modules, i.e. to control the first switching module to be turned off, the second switching module to be turned on, and the DC/DC module to supply 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 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 cycled as the user inserts/withdraws the first device.

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

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

The charging device may be a charger or may be a mobile power supply, for example.

The charging device comprises, for example, 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, which, when executed by the control unit, can implement the above-described process of power transmission control.

The memory may be a non-volatile storage medium for storing current thresholds, computer programs for execution by the processor, etc. Exemplary may include, but is not limited to, read-Only Memory (ROM), programmable ROM (PROM), erasable Programmable EPROM (EPROM), electrically Erasable EPROM (EEPROM), or Flash Memory (Flash Memory), which may be, for example, any of the following: embedded multimedia card (Embedded Multi Media Card, EMMC), nors Flash, nand Flash, etc.

Illustratively, the memory may further include a volatile storage medium for storing the first demand voltage, the second demand voltage, and the like. Exemplary may include, but are not limited to, random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), DDR2, DDR3, enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), direct RAM (DR RAM), and the like.

Furthermore, according to an embodiment of the present application, there is also provided a computer storage medium having stored thereon program instructions for performing the respective steps of the above-described method according to fig. 3 or fig. 4 of an embodiment of the present application when the program instructions are executed by a computer or a processor. The computer storage medium may be a computer readable storage medium, such as a memory card that may include a smart phone, a memory component of a tablet computer, a hard disk of a personal computer, read-only memory (ROM), erasable programmable read-only memory (EPROM), portable compact disc read-only memory (CD-ROM), USB memory, or any combination of the foregoing storage media.

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

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

In one embodiment, the code, when executed by a processor, causes the processor to: 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 as shown in fig. 1; and when the output current is greater than or equal to the current threshold value, controlling the first branch to be conducted and controlling the second branch to be disconnected.

Therefore, in the embodiment of the application, the charging control circuit is provided with the first branch and the second branch, and the on-off of the first branch and the second branch is controlled based on the output current of the first output circuit. In particular, the charging control circuit may be provided with the first switch module and the second switch module so that the first interface is not completely in a power-off state. Furthermore, by detecting the working current at the first interface in real time, the application can timely identify the change of the first equipment plug/pull at the first interface and further adjust the power distribution among the interfaces based on the change, thereby ensuring that the power distribution scheme is more reasonable and accurate and remarkably improving the user experience.

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

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application 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 order to streamline the application and aid in understanding one or more of the various inventive aspects, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of the application. However, the method of the present application should not be construed as reflecting the following intent: i.e., the claimed application 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 application.

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 units of any method or apparatus so disclosed, may be combined in any combination, except combinations where the 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 but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

Various component embodiments of the application 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 (Digital Signal Processing, DSP) may be used in practice to implement some or all of the functions of some of the modules in a charging device according to an embodiment of the application. The present application can also be implemented as an apparatus program (e.g., a computer program and a computer program product) for performing a portion or all of the methods described herein. Such a program embodying the present application may be stored on a computer readable medium, or may have the form of one or more signals. Such signals may be downloaded from an internet website, provided on a carrier signal, or provided in any other form.

It should be noted that the above-mentioned embodiments illustrate rather than limit the application, 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 application 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 use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.

The foregoing description is merely illustrative of specific embodiments of the present application and the scope of the present application is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the scope of the present application. The protection scope of the application is subject to the protection scope of the claims.

Claims

1. A charge control circuit, characterized by comprising: the power supply circuit 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, the first branch circuit comprises a first switch module, and the second branch circuit comprises a direct current-direct current module and a second switch module which are electrically connected;

the control unit is used for detecting the output current of the first output circuit, and controlling the first branch to be disconnected and the second branch to be connected when the output current is smaller than a current threshold value; also used for: and when the output current is greater than or equal to the current threshold value, controlling the first branch to be conducted and controlling the second branch to be disconnected.

2. The charge control circuit of claim 1, 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 connected to the first output circuit and a second required voltage of a second device connected to the second output circuit;

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

3. The charge control circuit of claim 2, wherein the control unit, prior to controlling the first leg to conduct, is further configured to:

the first output voltage is controlled to be equal to or smaller than the smaller of the first demand voltage and the second demand voltage.

4. 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.

5. The charge control circuit according to claim 1 or 4, wherein the control unit is further configured to:

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

6. A charge control circuit as claimed in claim 2 or 3, wherein the output power of the second output circuit is updated if the output current change is further detected to be less than the current threshold.

7. The charge control circuit of claim 1, wherein the first output circuit comprises a first interface or the first output circuit comprises a first interface and a lightning line, and the second output circuit comprises a second interface, wherein the second interface is an interface that meets a power transfer PD protocol.

8. A charging apparatus, characterized by comprising:

the charge control circuit according to any one of the preceding claims 1 to 7.

9. The charging device of claim 8, wherein the charging device is a charger or a mobile power source.