Charging circuit, charging assembly and terminal equipment

Abstract

The invention provides a charging circuit, a charging assembly and terminal equipment, the charging circuit comprises a power supply module, a control module and a first interface, the power supply module is connected with the control module and the first interface, and the control module is connected with the first interface; wherein the control module comprises a first control unit which is used for determining the output voltage of the power supply module according to the insertion state of the first interface and sending a control signal to a second control unit; and the second control unit is used for adjusting the conduction state of the power supply module and the first interface according to the control signal so as to control the first interface to supply power. The second control unit receives the control signal generated by whether the first control unit is inserted into the first interface or not to adjust the conduction state of the power supply module and the first interface so as to control the power supply of the first interface, so that the problem that the loss of the multi-port charger is increased due to excessive cost devices arranged in the multi-port charger can be solved; therefore, the use efficiency is reduced, and the user experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of terminal equipment, and in particular to a charging circuit, a charging component and a terminal equipment. Background Art

[0002] As people's demand for terminal devices continues to grow, multi-port chargers play an increasingly important role in improving charging efficiency and user experience. Multi-port chargers can not only provide power to multiple devices at the same time, but also help reduce overall energy consumption and improve the performance of terminal devices by optimizing power management and distribution.

[0003] In the process of conceiving and implementing this application, the inventors found that there are at least the following problems: In some solutions, the output of the multi-port charger needs to be controlled by, for example, a BUCK circuit and a protocol IC to achieve voltage conversion to output the corresponding output voltage. However, too many cost devices in the multi-port charger will increase the loss of the multi-port charger, thereby reducing the efficiency of use.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the invention

[0005] In response to the above technical problems, the present application provides a charging circuit, a charging component and a terminal device, which can reduce the loss of a multi-port charger and improve the efficiency of use.

[0006] In order to solve the above technical problems, the present application provides a charging circuit, including a power module, a control module and a first interface, wherein the power module is connected to the control module and the first interface respectively, and the control module is connected to the first interface; wherein the control module includes:

[0007] A first control unit, used to determine the output voltage of the power module according to the insertion state of the first interface, and send a control signal to the second control unit;

[0008] The second control unit is used to adjust the conduction state of the power module and the first interface according to the control signal to control the power supply of the first interface.

[0009] Optionally, the first control unit includes a detection subunit and an output subunit;

[0010] A detection subunit, connected to the first interface, for detecting an insertion state of the first interface, and determining an output voltage of the power module according to the insertion state of the first interface;

[0011] The output subunit is connected to the second control unit and is used to determine or generate a control signal according to the insertion state of the first interface.

[0012] Optionally, when the insertion state of the first interface is the inserted state, the power module sends a first control signal to the second control unit; the first control signal is used to control the power module to supply power with a first output voltage through the first interface; or,

[0013] When the insertion state of the first interface is the uninserted state, the power module sends a second control signal to the second control unit; the second control signal is used to control the power module to supply power with the second output voltage or the third output voltage through the first interface.

[0014] Optionally, the second control unit includes a first MOS tube, a source of the first MOS tube is connected to the first interface, a drain of the first MOS tube is connected to the power module, and a gate of the first MOS tube is connected to the first control unit;

[0015] When the control signal sent by the first control unit to the gate of the first MOS tube is a first level signal, the source of the first MOS tube is connected to the drain of the first MOS tube, and the power module supplies power with the first output voltage through the first interface; or,

[0016] When the control signal sent by the first control unit to the gate of the first MOS tube is a second level signal, the source of the first MOS tube is disconnected from the drain of the first MOS tube, and the first interface is powered by the third output voltage.

[0017] Optionally, the charging circuit further includes a second interface, and the second interface is connected to the power module in parallel with the first interface through a second control unit;

[0018] The second control unit is configured to adjust the conduction state of the power module and the second interface according to the control signal to control the power supply of the second interface.

[0019] Optionally, when the control signal is a first level signal, the conduction state between the power module and the first interface is on, and the conduction state between the power module and the second interface is off;

[0020] When the control signal is a second level signal, the conduction state between the power module and the first interface, and the conduction state between the power module and the second interface are both conduction.

[0021] Optionally, the second control unit includes a second MOS tube, a source of the second MOS tube is connected to the second interface, a drain of the second MOS tube is connected between the power module and the first interface, and a gate of the second MOS tube is connected to the first control unit;

[0022] When the control signal is a first level signal, the source of the second MOS tube and the drain of the second MOS tube are turned on, and the power module and the first interface are turned on, and the power module and the second interface are turned on; or,

[0023] When the control signal is a second level signal, the source and drain of the second MOS tube are disconnected, the conduction state between the power module and the first interface is on, and the conduction state between the power module and the second interface is off.

[0024] Optionally, when the conduction state between the power module and the second interface is on, the first interface is powered by the first output voltage or the second output voltage;

[0025] When the conduction state between the power module and the second interface is disconnected, the first interface is powered by the second output voltage or the third output voltage.

[0026] The present application also provides a charging component, comprising the charging circuit in any of the above embodiments.

[0027] The present application also provides a terminal device, comprising the charging component in the above embodiment.

[0028] As mentioned above, the charging circuit, charging component and terminal device of the present application include a power module, a control module and a first interface, the power module is connected to the control module and the first interface respectively, and the control module is connected to the first interface; wherein the control module includes: a first control unit, for determining the output voltage of the power module according to the insertion state of the first interface, and sending a control signal to the second control unit; a second control unit, for adjusting the conduction state of the power module and the first interface according to the control signal, so as to control the power supply of the first interface. The present application adjusts the conduction state of the power module and the first interface to control the power supply of the first interface by receiving the control signal generated by the first control unit when an external device is inserted into the first interface through the second control unit, so as to control the power supply of the first interface, which can solve the problem that too many cost devices set in a multi-port charger will increase the loss of the multi-port charger, thereby reducing the use efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0030] Figure 1 A schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application;

[0031] Figure 2 It is a structural schematic diagram of an existing multi-port charger circuit provided in an embodiment of the present application;

[0032] Figure 3This is a schematic diagram of a charging circuit provided by an embodiment of the present application. Figure 1 ;

[0033] Figure 4 This is a schematic diagram of a charging circuit provided by an embodiment of the present application. Figure 2 ;

[0034] Figure 5 This is a schematic diagram of a charging circuit provided by an embodiment of the present application. Figure 3 ;

[0035] Figure 6 This is a schematic diagram of a charging circuit provided by an embodiment of the present application. Figure 4 ;

[0036] Figure 7 This is a schematic diagram of a charging circuit provided by an embodiment of the present application. Figure 5 .

[0037] The realization of the purpose, functional features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. The above-mentioned drawings have shown clear embodiments of this application, which will be described in more detail later. These drawings and textual descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0038] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0039] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element. Optionally, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context in the specific embodiment.

[0040] It should be understood that, although the terms first, second, third, etc. may be used to describe various information in this article, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this article, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination". Furthermore, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising", "including" indicate the existence of features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or more other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or", "and / or", "including at least one of the following" etc. used in this application can be interpreted as inclusive, or mean any one or any combination. For example, “comprising at least one of the following: A, B, C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”, and for another example, “A, B or C” or “A, B and / or C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”. An exception to this definition will only occur when a combination of elements, functions, steps or operations are inherently mutually exclusive in some manner.

[0041] It should be understood that, although the various steps in the flowchart in the embodiment of the present application are displayed in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and it can be performed in other orders. Moreover, at least a portion of the steps in the figure may include a plurality of sub-steps or a plurality of stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and their execution order is not necessarily performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0042] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0043] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0044] In the subsequent description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present application, and have no specific meanings. Therefore, "module", "component" or "unit" can be used in a mixed manner.

[0045] The terminal device may be implemented in various forms. For example, the terminal device described in this application may include mobile terminals such as mobile phones, tablet computers, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminals such as digital TVs and desktop computers.

[0046] The following description will be made by taking a mobile terminal as an example, and those skilled in the art will understand that, in addition to components specifically used for mobile purposes, the construction according to the embodiments of the present application can also be applied to fixed-type terminals.

[0047] See also Figure 1 , which is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application, the mobile terminal 100 may include: RF (Radio Frequency, radio frequency) unit 101, WiFi module 102, audio output unit 103, A / V (audio / video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111 and other components. Those skilled in the art can understand that Figure 1 The structure of the mobile terminal shown in the figure does not constitute a limitation on the mobile terminal. The mobile terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0048] Combine the following Figure 1 The following is a detailed introduction to the various components of the mobile terminal:

[0049] The radio frequency unit 101 can be used for receiving and sending signals during information transmission or communication. Specifically, after receiving the downlink information of the base station, it is sent to the processor 110 for processing; in addition, the uplink data is sent to the base station. Generally, the radio frequency unit 101 includes but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc. In addition, the radio frequency unit 101 can also communicate with the network and other devices through wireless communication. The above-mentioned wireless communications may use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division Duplexing- Long Term Evolution), TDD-LTE (Time Division Duplexing- Long Term Evolution) and 5G, etc.

[0050] WiFi is a short-range wireless transmission technology. Mobile terminals can help users send and receive emails, browse web pages, and access streaming media through WiFi module 102. It provides users with wireless broadband Internet access. Figure 1 The WiFi module 102 is shown, but it is understandable that it is not an essential component of the mobile terminal and can be omitted as needed without changing the essence of the invention.

[0051] The audio output unit 103 can convert the audio data received by the RF unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output it as sound when the mobile terminal 100 is in a call signal reception mode, a talk mode, a recording mode, a voice recognition mode, a broadcast reception mode, etc. Moreover, the audio output unit 103 can also provide audio output related to a specific function performed by the mobile terminal 100 (for example, a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, etc.

[0052] The A / V input unit 104 is used to receive audio or video signals. The A / V input unit 104 may include a graphics processor (GPU) 1041 and a microphone 1042, and the graphics processor 1041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The processed image frame can be displayed on the display unit 106. The image frame processed by the graphics processor 1041 can be stored in the memory 109 (or other storage medium) or sent via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 can receive sound (audio data) via the microphone 1042 in a telephone call mode, a recording mode, a voice recognition mode, and the like, and can process such sound into audio data. The processed audio (voice) data can be converted into a format output that can be sent to a mobile communication base station via the radio frequency unit 101 in the case of a telephone call mode. The microphone 1042 can implement various types of noise elimination (or suppression) algorithms to eliminate (or suppress) noise or interference generated in the process of receiving and sending audio signals.

[0053] The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Optionally, the light sensor includes an ambient light sensor and a proximity sensor. Optionally, the ambient light sensor can adjust the brightness of the display panel 1061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 1061 and / or the backlight when the mobile terminal 100 is moved to the ear. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that identify the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors that can also be configured on the mobile phone, such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they will not be repeated here.

[0054] The display unit 106 is used to display information input by the user or information provided to the user. The display unit 106 may include a display panel 1061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0055] The user input unit 107 can be used to receive input digital or character information, and generate key signal input related to user settings and function control of the mobile terminal. Optionally, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also known as a touch screen, can collect user touch operations on or near it (such as operations performed by users using fingers, styluses, or any other suitable objects or accessories on or near the touch panel 1071), and control the corresponding connection device according to a pre-set program. The touch panel 1071 may include a touch detection device and a touch controller. Optionally, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into touch point coordinates, and then sends it to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves. In addition to the touch panel 1071, the user input unit 107 may also include other input devices 1072. Optionally, the other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, a function key (such as a volume control key, a switch key, etc.), a trackball, a mouse, a joystick, etc., which are not specifically limited here.

[0056] Optionally, the touch panel 1071 may cover the display panel 1061. When the touch panel 1071 detects a touch operation on or near it, it transmits the information to the processor 110 to determine the type of touch event. Then, the processor 110 provides corresponding visual output on the display panel 1061 according to the type of touch event. Figure 1 In the figure, the touch panel 1071 and the display panel 1061 are used as two independent components to implement the input and output functions of the mobile terminal. However, in some embodiments, the touch panel 1071 and the display panel 1061 can be integrated to implement the input and output functions of the mobile terminal, which is not limited here.

[0057] The interface unit 108 serves as an interface through which at least one external device can be connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, etc. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and an external device.

[0058] The memory 109 can be used to store software programs and various data. The memory 109 can mainly include a program storage area and a data storage area. Optionally, the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory 109 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0059] The processor 110 is the control center of the mobile terminal. It uses various interfaces and lines to connect various parts of the entire mobile terminal. It executes various functions of the mobile terminal and processes data by running or executing software programs and / or modules stored in the memory 109, and calling data stored in the memory 109, so as to monitor the mobile terminal as a whole. The processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor and a modem processor. Optionally, the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 110.

[0060] The mobile terminal 100 may further include a power supply 111 (such as a battery) for supplying power to various components. Preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, thereby implementing functions such as charging, discharging, and power consumption management through the power management system.

[0061] although Figure 1 Not shown, the mobile terminal 100 may further include a Bluetooth module, etc., which will not be described in detail here.

[0062] Based on the above-mentioned mobile terminal hardware structure, various embodiments of the present application are proposed.

[0063] The circuit structure of the multi-port charger in some technologies is as follows Figure 2 As shown in the figure, in the multi-port charger design, the AC power is first converted into stable DC power through the rectifier and filter circuit, and then a basic voltage is generated through the primary-secondary DC conversion circuit. However, there are the following problems: each output requires a separate BUCK step-down circuit and protocol IC to step down the secondary high voltage and convert it into the corresponding output voltage, which leads to greater power loss, lower efficiency, and excessive use of devices, which not only occupies a larger PCB volume, but also significantly increases the cost.

[0064] First embodiment

[0065] Figure 3 This is a schematic diagram of a charging circuit provided by an embodiment of the present application. Figure 1 .like Figure 3 As shown, the charging circuit includes a power module 301 , a control module and a first interface 304 . The power module 301 is connected to the control module and the first interface 304 respectively, and the control module is connected to the first interface 304 .

[0066] Optionally, the control module includes:

[0067] The first control unit 302 is used to determine the output voltage of the power module 401 according to the insertion state of the first interface 304, and send a control signal to the second control unit;

[0068] The second control unit 303 is used to adjust the conduction state between the power module 301 and the first interface 304 according to the control signal, so as to control the first interface 304 to supply power.

[0069] Optionally, the power module 301 may refer to a core component for providing power, which receives an input power source (such as an AC power source or another type of DC power source), converts and regulates it, and outputs a stable DC voltage for charging a connected external device. Types of the power module 301 include, but are not limited to, an AC-DC adapter, a DC-DC converter, and a linear regulator.

[0070] Optionally, the first interface 304 may refer to a component in the charging circuit that is connected to an external device and charges the external device. Optionally, the first interface 304 may adjust the charging voltage as needed during charging. Optionally, the first interface 304 may be a USB Type-C interface compatible with the USB Power Delivery (PD) protocol, a Thunderbolt 3 / 4 interface, or the like.

[0071] Optionally, the control unit can be the hub of the charging circuit, used to manage and coordinate the power transmission between the power module 301 and the first interface 304, that is, it can adjust the output voltage of the power module 301 and control the switching state of the power module 301 by detecting the status of the first interface 304 (whether a device is plugged in and the type of device), and ensure that the external device can obtain a suitable charging voltage.

[0072] In the embodiment of the present application, the insertion state of the first interface 304 includes an inserted state indicating that the first interface 304 is inserted into an external device and an uninserted state indicating that the first interface 304 is not inserted into an external device.

[0073] Optionally, when the first interface 304 is plugged into an external device, the first control unit 302 having or connected to a detection mechanism can identify that the external device is plugged into the first interface 304. The detection mechanism triggers a signal to the first control unit 302, and the first control unit 302 can also read the power demand information of the plugged in device, and according to the received device demand information, the first control unit 302 determines the output voltage that the power module 301 should provide. After determining the appropriate output voltage, the first control unit 302 generates a corresponding control signal and sends it to the second control unit 303. After receiving the control signal from the first control unit 302, the second control unit 303 adjusts the circuit between the power module 301 and the first interface 304 according to the signal content, so that the power module 301 can power the plugged in device according to the specified voltage and current.

[0074] Optionally, when the first interface 304 is not plugged into an external device, the first control unit 302 may configure the power module 301 to a default output setting, so that the output of the power module 301 is disabled or set in a general but low-power state to avoid unnecessary power consumption. The second control unit 303 may also disconnect the conduction path between the power module 301 and the first interface 304 according to a signal sent by the first control unit 302 (indicating that no device is plugged in).

[0075] Optionally, the opening and closing of the circuit between the power module 301 and the first interface 304 can be directly controlled by components such as relays and MOSFETs, thereby preventing current from flowing to the idle interface, reducing energy loss and improving safety.

[0076] In some embodiments, the first control unit 302 includes a detection subunit and an output subunit; optionally, the detection subunit is connected to the first interface 304, and is used to detect the insertion status of the first interface 304, and determine the output voltage of the power module 301 according to the insertion status of the first interface 304; the output subunit is connected to the second control unit 303, and is used to determine or generate a control signal according to the insertion status of the first interface 304.

[0077] Optionally, the detection subunit may be a subunit on the first control unit 302 for detecting the insertion state of the first interface 304 , and the output subunit may be a subunit on the first control unit 302 for outputting a control signal.

[0078] Optionally, when the detection subunit detects that the insertion state of the first interface 304 is the inserted state, the output voltage of the power module 301 is the first output voltage, and the control signal that the output subunit can send to the second control unit 303 is the first control signal; the first control signal is used to control the power module 301 to supply power with the first output voltage through the first interface 304; the first output voltage is determined according to the external device inserted into the first interface 304. When the detection subunit detects that the insertion state of the first interface 304 is the uninserted state, the output voltage of the power module 301 is the preset second output voltage, and the control signal that the output subunit can send to the second control unit 303 is the second control signal; the second control signal is used to control the power module 301 to supply power with the second output voltage or the third output voltage through the first interface 304.

[0079] Optionally, the communication protocol may refer to a set of rules and standards followed when exchanging data between the first interface 304 and an external device. The communication protocol may characterize the charging voltage at which the charging circuit charges the external device. Optionally, when the communication protocol is the USB Power Delivery (PD) protocol, the first interface 304 may be allowed to support a variety of voltage and current configurations to achieve flexible power transmission. The power supply parameters are negotiated through the BMC encoding on the CC line (Configuration Channel Line) to ensure that the output voltage and current can be safely adjusted on both ends of the device. When the communication protocol is the Qualcomm Quick Charge (QC) protocol, the first interface 304 is allowed to charge with higher voltage and higher current. Higher voltage levels can be negotiated by sending specific signals to speed up charging.

[0080] Optionally, the first output voltage, the second output voltage and the third output voltage may be different output voltages, the first output voltage may be higher than the third output voltage, and the third output voltage may be higher than the second output voltage.

[0081] The first level signal and the second level signal may refer to the logic levels at which the first control unit 302 instructs the second control unit 303 to take different actions according to whether an external device is inserted into the first interface 304. The first level signal and the second level signal may be set arbitrarily as needed. Optionally, the first level signal may be a high level signal (the logic may be "1"), and the second level signal may be a low level signal (the logic may be "0").

[0082] Optionally, the external device plugged into the first interface 304 may be a device that needs voltage regulation for charging, that is, a device that needs to be charged with a first output voltage. However, if the external device is a device that needs to be charged with a second output voltage, when the external device is plugged into the first interface 304, the first interface 304 may also be charged with the second output voltage through a second level signal.

[0083] Optionally, when the first interface 304 is plugged into an external device, the first control unit 302 in the control unit can control the output voltage of the power module 301 to be the first output voltage and output a first level signal to the second control unit 303 according to the communication protocol with the external device. The second control unit 303 adjusts the conduction state of the power module 301 and the first interface 304 according to the first level signal so that the power module 301 adjusts the output voltage of the first interface 304 to the first output voltage.

[0084] Optionally, when the first interface 304 is not plugged into an external device, the first control unit 302 in the control unit can control the output voltage of the power module 301 to be a second output voltage, and output a second level signal to the second control unit 303. The second control unit 303 adjusts the conduction state of the power module 301 and the first interface 304 according to the second level signal, so that the power module 301 adjusts the output voltage of the first interface 304 to the second output voltage.

[0085] In some embodiments, the first control unit 302 may include a protocol control chip, the detection subunit may be a protocol detection pin and / or a device detection pin on the protocol control chip, and the output subunit may be a level output pin on the protocol control chip. Optionally, the protocol detection pin is connected to the first interface 304, and is used to obtain the communication protocol of the external device when the first interface 304 is inserted into the external device; and according to the communication protocol with the external device, the output voltage of the control power module 301 is controlled to be the first output voltage, or when the first interface 304 is not inserted into the external device, the output voltage of the control power module 301 is controlled to be the second output voltage; optionally, the level output pin is connected to the second control unit 303, and is used to output the first level signal or the second level signal according to the communication protocol with the external device. Optionally, the device detection pin is connected to the first interface 304, and is used to detect whether the external device is inserted into the first interface 304.

[0086] Optionally, the protocol control chip may refer to an integrated circuit that integrates multiple fast charging protocol parsing functions. The protocol control chip may include a protocol detection pin, a level output pin, and a device detection pin. Optionally, when the device detection pin detects that an external device is inserted into the first interface 304, the communication protocol of the external device can be obtained through the protocol detection pin, and the protocol control chip parses the communication protocol to output a first level signal from the level output pin to the second control unit 303. When the device detection pin does not detect that an external device is inserted into the first interface 304, the protocol detection pin cannot obtain the communication protocol of the external device, and the level output pin of the protocol control chip outputs a second level signal to the second control unit 303 according to a preset setting rule.

[0087] In an embodiment of the present application, the protocol control chip may be a chip that has internally integrated synchronous MOS and PD&QC&TC3.0 protocol parsing functions and supports a USB Type-C interface with 0-12V output.

[0088] In some embodiments, the first interface 304 includes a power interface and a protocol detection interface. Optionally, the power interface is connected to the power module 301 , and the protocol detection interface is connected to the first control unit 302 .

[0089] Therefore, the charging circuit provided in the embodiment of the present application dynamically adjusts the output voltage of the power module through the control module, so that there is no need to configure a complex voltage conversion circuit for the interface in the charging circuit, so that when the charging circuit of the embodiment of the present application is applied to a multi-port charger, it can realize on-demand power supply, while reducing unnecessary power loss and redundant components, thereby reducing costs and improving efficiency. In addition, when it is detected that a device is inserted, the first control unit adjusts the output voltage according to the communication protocol and sends a level signal to the second control unit, which optimizes the conduction state accordingly to ensure the safety and efficiency of power transmission; and when no device is connected, it automatically switches to low power consumption mode to further save energy. The charging circuit provided in the embodiment of the present application not only simplifies the design of the circuit, but also enhances the flexibility and compatibility of the circuit, and provides fast response and good user experience.

[0090] Second embodiment

[0091] Figure 4 This is a schematic diagram of a charging circuit provided by an embodiment of the present application. Figure 2 .like Figure 4 As shown, the charging circuit includes: a power module 401, a first control unit 402, a second control unit and a first interface 404. Optionally, the power module 401 is connected to the first control unit 402 and the second control unit, the first control unit 402 is connected to the second control unit, and the first control unit 402 and the second control unit are also connected to the first interface 404.

[0092] Optionally, the second control unit includes a first MOS transistor 403 , a source of the first MOS transistor 403 is connected to the first interface 404 , a drain of the first MOS transistor 403 is connected to the power module 401 , and a gate of the first MOS transistor 403 is connected to the first control unit 402 .

[0093] Optionally, when the control signal sent by the first control unit 402 to the gate of the first MOS tube 403 is a first level signal, the source of the first MOS tube 403 is connected to the drain of the first MOS tube 403, and the power module 401 supplies power with a first output voltage through the first interface 404; optionally, when the control signal sent by the first control unit 402 to the gate of the first MOS tube 403 is a second level signal, the source of the first MOS tube 403 is disconnected from the drain of the first MOS tube 403, and the first interface 404 supplies power with a third output voltage.

[0094] Optionally, the first MOS tube 403 is used to control the power transmission path between the power module 401 and the first interface 404. The first MOS tube 403 can receive a level signal from the first control unit 402 to determine whether to open or close the circuit.

[0095] In the embodiment of the present application, the first MOS tube 403 can be an NMOS tube. The source (Source) of the first MOS tube 403 is connected to the first interface 404 and is responsible for providing power to external devices; the drain (Drain) is connected to the power module 401 as the input end of power; the gate (Gate) is connected to the first control unit 402 and receives a control signal to determine the working state of the first MOS tube 403.

[0096] When the first interface 404 is plugged into an external device, the first control unit 402 determines the required output voltage according to the communication protocol, and sends a first level signal of a high level (e.g., logic "1") to the gate of the first MOS tube 403. After receiving the high level signal, the first MOS tube 403 enters a conducting state, that is, a low resistance channel is formed between the source and the drain, allowing current to flow from the power module 401 to the first interface 404, thereby powering the external device.

[0097] During the charging process, the first control unit 402 continuously monitors the current and voltage levels to ensure that they remain within a safe range and can respond promptly to any changes, such as cutting off the current path and stopping power supply when the device is unplugged or charging is completed. In this way, the system can not only intelligently identify device needs and adjust the output voltage accordingly, but also safely and efficiently manage the entire power delivery process.

[0098] When the first interface 404 is not plugged into an external device, the first control unit 402 sends a second level signal of a low level (e.g., logic "0") to the gate of the first MOS tube 403. After receiving the low level signal, the first MOS tube 403 enters a cut-off state, i.e., a high impedance is presented between the source and the drain to prevent current from flowing, thereby disconnecting the connection between the power module 401 and the first interface 404, i.e., the third output voltage of the first interface 404 is 0V, thereby reducing standby power consumption.

[0099] In some embodiments, one first control unit 402 may control one corresponding first interface 404 through one second control unit, or one first control unit 402 may control multiple second control units and multiple corresponding first interfaces 404 .

[0100] The charging circuit provided in the embodiment of the present application can complete the on and off operation within the microsecond level by using the first MOS tube, ensuring a quick response to the device insertion / removal event, and when the power module is in the on state, the on resistance inside the first MOS tube is very small, which can reduce the energy loss in the power transmission process. At the same time, through gate control, it is possible to achieve accurate management between the power module and the first interface, provide necessary electrical isolation, and improve the safety and reliability of the system. Therefore, the use of the first MOS tube reduces the volume and weight of the entire charging circuit, improves the problem of increased loss caused by setting too many cost devices, and thus ensures the efficiency of the charging circuit when in use. In addition, the use of the first MOS tube can also automatically cut off the circuit when an abnormally high current is detected to prevent overcurrent protection that damages the device, and quickly respond in the event of a short circuit, immediately stop the current flow, and ensure short-circuit protection for circuit safety.

[0101] Figure 5 This is a schematic diagram of a charging circuit provided by an embodiment of the present application. Figure 3 .like Figure 5 As shown, the charging circuit includes: a power module NS, a protocol control chip U1, an NMOS tube Q1 and a USB Type-C interface. Optionally, the protocol control chip U1 may include 10 pins, wherein the D pin represents the drain of the MOS integrated inside the protocol control chip U1, the GND pin represents the source of the MOS integrated inside the protocol control chip U1, the Vcc pin is the power supply pin of the protocol control chip U1, the DRV pin is the output drive pin of the protocol control chip U1, the BUS pin is a pin for detecting the output voltage and the output voltage discharge, and the D+ pin, the D- pin, the CC1 pin and the CC2 pin are integrated protocol detection pins.

[0102] Optionally, the D pin of the protocol control chip U1 is connected to one end of the power module NS, the Vcc pin of the protocol control chip U1 is connected to the other end of the power module NS, the GND pin of the protocol control chip U1 is grounded, the BUS pin of the protocol control chip U1 is connected to the VBUS pin of the USB Type-C interface, the DRV pin of the protocol control chip U1 is connected to the gate of the NMOS tube Q1, the D+ pin of the protocol control chip U1 is connected to the D+ pin of the USB Type-C interface, the D- pin of the protocol control chip U1 is connected to the D- pin of the USB Type-C interface, the CC1 pin of the protocol control chip U1 is connected to the CC1 pin of the USB Type-C interface, and the CC2 pin of the protocol control chip U1 is connected to the CC2 pin of the USB Type-C interface.

[0103] Optionally, the other end of the power module NS is also connected to the VBUS pin of the USB Type-C interface.

[0104] Optionally, the drain of the NMOS tube Q1 is connected to the power module NS, and the source of the NMOS tube Q1 is connected to the VBUS pin of the USB Type-C interface.

[0105] In an embodiment of the present application, when the USB Type-C interface is inserted into an external device, the D+ pin, D- pin, CC1 pin and CC2 pin can adjust the output voltage of the power module NS according to the charging protocol of the external device, and output a first level signal from the DRV pin of the protocol control chip U1, so that the drain of the NMOS tube Q1 and the source of the NMOS tube Q1 are turned on, and the power module NS is controlled to power the external device with the first output voltage through the VBUS of the USB Type-C interface.

[0106] Optionally, when the external device is not plugged into the first interface, the protocol control chip U1 sends a low-level signal (logic "0") to the NMOS tube Q1 after confirming that no device is connected through the detection mechanism, so that the NMOS tube Q1 is in a cut-off state, disconnecting the current path between the power module NS and the USB Type-C interface, avoiding unnecessary power consumption and ensuring safety. In addition, the protocol control chip U1 can also switch to a low-power mode to reduce its own energy consumption.

[0107] Optionally, when an external device is plugged into the first interface, a mobile phone supporting the USB Power Delivery (USB PD) protocol is connected to the USB Type-C interface, and the protocol control chip U1 detects and confirms the device's needs through the USB PD communication protocol, and determines that the required output voltage is 9V. Subsequently, the protocol control chip U1 adjusts the power module NS to prepare to output the corresponding voltage, and sends a high-level signal to the driving circuit that controls the gate of the NMOS tube Q1, so that the NMOS tube Q1 enters the on state, that is, a low-resistance channel is formed between the source and the drain, allowing current to flow from the power module NS to the first interface, providing the required power for the mobile phone and starting the charging process.

[0108] Third embodiment

[0109] Figure 6 This is a schematic diagram of a charging circuit provided by an embodiment of the present application. Figure 4 .like Figure 6 As shown, the charging circuit includes: a power module 601, a first control unit 602, a second control unit 603, a first interface 604 and a second interface 605. Optionally, the second interface 605 is connected in parallel to the power module 601 through the second control unit 603 and the first interface 604.

[0110] Optionally, the second control unit 603 is further configured to adjust the conduction state of the power module 601 and the second interface 605 according to the control signal, so as to control the power supply of the second interface 605 .

[0111] Optionally, the second interface 605 may refer to a component in the charging circuit that is connected to an external device and charges the external device, and the second interface 605 may be an interface different from the first interface 604. Optionally, when charging, the second interface 605 may be an interface that charges at a fixed charging voltage, and the second interface 605 may be compatible with a USB A interface, a MicroUSB interface, a Mini USB interface, and the like.

[0112] When the charging circuit includes a first interface 604 and a second interface 605, the second control unit 603 is configured to adjust the conduction state of the power module 601 and the first interface 604, and the conduction state of the power module 601 and the second interface 605 according to a control signal to control the power supply of the first interface 604 and the second interface 605.

[0113] In some embodiments, the number of the second control units 603 may correspond to the number of the first interface 604 and the second interface 605, that is, each interface is provided with a second control unit 603. By inputting a control signal to the second control unit 603, the connection between the first interface 604 and the power module 601 and the connection between the second interface 605 and the power module 601 are controlled.

[0114] In order to further reduce unnecessary power loss and redundant components, the second interface 605 can be connected to the power module 601 in parallel with the first interface 604 through the second control unit 603. That is, the first interface 604 can be directly connected to the power module 601, and the second interface 605 is connected between the first interface 604 and the power module 601 through the second control unit 603.

[0115] Optionally, when the control signal is a first level signal, the conduction state of the power supply module 601 and the first interface 604 is on, the output voltage of the first interface 604 is the first output voltage, the conduction state of the power supply module 601 and the second interface 605 is disconnected, and the output voltage of the second interface 605 is the second output voltage; optionally, when the control signal is a second level signal, the conduction state of the power supply module 601 and the first interface 604, and the conduction state of the power supply module 601 and the second interface 605 are both on, and the output voltage of the first interface 604 and the second interface 605 are the third output voltage.

[0116] Optionally, the second control unit 603 includes a second MOS tube, the source of the second MOS tube is connected to the second interface 605 , the drain of the second MOS tube is connected between the power module 601 and the first interface 604 , and the gate of the second MOS tube is connected to the first control unit 602 .

[0117] Optionally, when the control signal is a first level signal, the source of the second MOS tube and the drain of the second MOS tube are turned on, and the on-state of the power module 601 and the first interface 604, and the on-state of the power module 601 and the second interface 605 are all turned on; optionally, when the control signal is a second level signal, the source of the second MOS tube and the drain of the second MOS tube are disconnected, the on-state of the power module 601 and the first interface 604 is turned on, and the on-state of the power module 601 and the second interface 605 is turned off.

[0118] Optionally, the second MOS tube is used to control the power transmission path between the power module 601 and the first interface 604 and the second interface 605. The level signal received from the first control unit 602 can be used to determine whether to turn on or off the circuit.

[0119] In the embodiment of the present application, the second MOS tube may be a PMOS tube, the source of the second MOS tube is connected to the second interface 605 , the drain is connected between the power module 601 and the first interface 604 , and the gate is connected to the first interface 604 .

[0120] When the first interface 604 is plugged into an external device, the first control unit 602 determines the required output voltage according to the communication protocol, and sends a first level signal of a high level (e.g., logic "1") to the gate of the second MOS tube. After receiving the high level signal, the second MOS tube enters a disconnected state, that is, a high impedance is presented between the source and the drain, preventing current from flowing. The power module 601 is only connected to the first interface 604 and can be charged with the first output voltage.

[0121] When the first interface 604 is not plugged into an external device, the first control unit 602 sends a second level signal of a low level (for example, logic "0") to the gate of the second MOS tube. After receiving the low level signal, the second MOS tube enters a conducting state, that is, a low resistance channel is formed between the source and the drain, allowing current to flow from the power module 601 to the first interface 604 and the second interface 605. The output voltage of the first interface 604 and the second interface 605 can be a third output voltage, and the third output voltage can be 5V.

[0122] In some embodiments, the first control unit 602 includes a protocol control chip, and the device detection pins in the protocol control chip are connected to the first interface 604 and the second interface 605 respectively.

[0123] The charging circuit provided in the embodiment of the present application supports multi-interface operation through the setting of the first interface and the second interface. At the same time, through the setting of the second MOS tube, the power module can be allowed to supply power to multiple interfaces separately or simultaneously according to actual needs, thereby enhancing the flexibility and adaptability of the circuit. At the same time, by reasonably configuring the working mode of the second MOS tube, it can better support devices of different types and protocols, thereby improving the versatility and user experience of the charger.

[0124] Figure 7 This is a schematic diagram of a charging circuit provided by an embodiment of the present application. Figure 5 .like Figure 7 As shown, the charging circuit includes: a power module NS, a protocol control chip U1, a PMOS tube Q1, a USB Type-C interface and a USB A interface.

[0125] Optionally, the D pin of the protocol control chip U1 is connected to one end of the power module NS, the Vcc pin of the protocol control chip U1 is connected to the other end of the power module NS, the GND pin of the protocol control chip U1 is grounded, the BUS pin of the protocol control chip U1 is respectively connected to the VBUS pin of the USB Type-C interface and the VBUS pin of the USB A interface, the DRV pin of the protocol control chip U1 is connected to the gate of the PMOS tube Q1, the D+ pin of the protocol control chip U1 is connected to the D+ pin of the USB Type-C interface, the D- pin of the protocol control chip U1 is connected to the D- pin of the USB Type-C interface, the CC1 pin of the protocol control chip U1 is connected to the CC1 pin of the USB Type-C interface, and the CC2 pin of the protocol control chip U1 is connected to the CC2 pin of the USB Type-C interface.

[0126] Optionally, the other end of the power module NS is also connected to the VBUS pin of the USB Type-C interface and the VBUS pin of the USB A interface respectively.

[0127] The source of the PMOS tube Q1 is connected between the VBUS pin of the USB A interface and the BUS pin of the protocol control chip U1, and the drain is connected between the VBUS pin of the USB Type-C interface and the power module NS.

[0128] In an embodiment of the present application, when the USB Type-C interface is inserted into an external device, the D+ pin, D- pin, CC1 pin and CC2 pin can output a first level signal from the DRV pin of the protocol control chip U1 according to the charging protocol of the external device, thereby connecting the drain of the NMOS tube Q1 and the source of the NMOS tube Q1, and controlling the power module NS to supply power to the VBUS of the USB Type-C interface, and the USB A interface is disconnected from the power module NS and has no output.

[0129] When the USB A interface is plugged into an external device, the BUS pin of the protocol control chip U1 detects the insertion, and the DRV pin of the protocol control chip U1 outputs a second level signal. The power module NS is not voltage-regulated, and both the USB Type-C interface and the USB A interface output the second output voltage.

[0130] For example, in the standby state, both the USB Type-C interface and the USB A interface provide 5V output. At this time, the DRV pin of the protocol control chip U1 is driven to a low level, so that the NMOS tube Q1 is in the on state.

[0131] When the USB Type-C interface is first connected to an external device, the CC1 pin, CC2 pin, D+ pin, and D- pin of the protocol control chip U1 begin to communicate with the device and increase the voltage as needed. At this time, after detecting the voltage boost request, the DRV pin is driven to a high level, turning off Q1. As a result, only the USB Type-C interface works normally as required by the protocol, while the USBA interface remains in a safe 5V state, thus avoiding the risk of exceeding its rated voltage.

[0132] If the USB A interface is connected to an external device first, the BUS pin will detect that the device is plugged in. At this time, the CC1 pin, CC2 pin, D+ pin, and D- pin of the protocol control chip U1 will not process any boost signals, and the DRV pin maintains a low level to ensure that Q1 remains in the on state. Therefore, both the USB A interface and the USB Type-C interface will continue to provide a stable 5V output to meet the needs of the connected device.

[0133] The present application also proposes a charging component, comprising the above-mentioned charging circuit.

[0134] The detailed structure of the charging circuit can refer to the above-mentioned embodiments and will not be described in detail here. It can be understood that since the mobile terminal in the embodiments of the present application includes the charging circuit in any of the above-mentioned embodiments, the embodiments of the present application include all the technical solutions of all the above-mentioned charging circuit embodiments, and the technical effects achieved are also exactly the same, which will not be described in detail here.

[0135] The present application also provides a terminal device, comprising the charging component in the above embodiment.

[0136] It is understood that the above scenarios are only examples and do not constitute a limitation on the application scenarios of the technical solutions provided in the embodiments of the present application. The technical solutions of the present application can also be applied to other scenarios. For example, it is known to those skilled in the art that with the evolution of the system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0137] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0138] The units in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0139] In the present application, the same or similar terminology concepts, technical solutions and / or application scenario descriptions are generally described in detail only the first time they appear. When they appear again later, they are generally not repeated for the sake of brevity. When understanding the technical solutions and other contents of the present application, for the same or similar terminology concepts, technical solutions and / or application scenario descriptions that are not described in detail later, reference can be made to the previous related detailed descriptions.

[0140] In the present application, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0141] The various technical features of the technical solution of the present application can be arbitrarily combined. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of the present application.

[0142] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A charging circuit, characterized in that: The invention comprises a power module, a control module and a first interface, wherein the power module is connected to the control module and the first interface respectively, and the control module is connected to the first interface; wherein the control module comprises: A first control unit, configured to determine an output voltage of the power module according to an insertion state of the first interface, and to send a control signal to a second control unit; The second control unit is used to adjust the conduction state of the power module and the first interface according to the control signal to control the power supply of the first interface.

2. The circuit according to claim 1, characterized in that The first control unit includes a detection subunit and an output subunit; The detection subunit is connected to the first interface and is used to detect the insertion state of the first interface and determine the output voltage of the power module according to the insertion state of the first interface; The output subunit is connected to the second control unit, and is used to determine or generate the control signal according to the insertion status of the first interface.

3. The circuit according to claim 2, characterized in that When the insertion state of the first interface is the inserted state, the power module sends a first control signal to the second control unit; the first control signal is used to control the power module to supply power with a first output voltage through the first interface; or, When the insertion state of the first interface is the uninserted state, the power module sends a second control signal to the second control unit; the second control signal is used to control the power module to supply power with the second output voltage or the third output voltage through the first interface.

4. The circuit according to claim 1, characterized in that The second control unit includes a first MOS tube, a source of the first MOS tube is connected to the first interface, a drain of the first MOS tube is connected to the power module, and a gate of the first MOS tube is connected to the first control unit; When the control signal sent by the first control unit to the gate of the first MOS tube is a first level signal, the source of the first MOS tube is connected to the drain of the first MOS tube, and the power module supplies power with a first output voltage through the first interface; or, When the control signal sent by the first control unit to the gate of the first MOS tube is a second level signal, the source of the first MOS tube is disconnected from the drain of the first MOS tube, and the first interface is powered by a third output voltage.

5. The circuit according to claim 1, characterized in that The charging circuit further includes a second interface, and the second interface is connected to the power module in parallel with the first interface through the second control unit; The second control unit is configured to adjust the conduction state of the power module and the second interface according to the control signal to control the power supply of the second interface.

6. The circuit according to claim 5, characterized in that When the control signal is a first level signal, the conduction state between the power module and the first interface is on, and the conduction state between the power module and the second interface is off; When the control signal is a second level signal, the conduction state between the power module and the first interface, and the conduction state between the power module and the second interface are both conduction.

7. The circuit according to claim 6, characterized in that The second control unit includes a second MOS tube, a source of the second MOS tube is connected to the second interface, a drain of the second MOS tube is connected between the power module and the first interface, and a gate of the second MOS tube is connected to the first control unit; When the control signal is the first level signal, the source of the second MOS tube and the drain of the second MOS tube are turned on, and the conduction state of the power module and the first interface, and the conduction state of the power module and the second interface are both turned on; or, When the control signal is the second level signal, the source of the second MOS tube and the drain of the second MOS tube are disconnected, the conduction state of the power module and the first interface is on, and the conduction state of the power module and the second interface is off.

8. The circuit according to any one of claims 5 to 7, characterized in that When the conduction state between the power module and the second interface is on, the first interface is powered by the first output voltage or the second output voltage; When the conduction state between the power module and the second interface is disconnected, the first interface is powered by the second output voltage or the third output voltage.

9. A charging assembly, characterized in that: The charging circuit comprises the charging circuit according to any one of claims 1 to 8.

10. A terminal device, characterized in that: Includes the charging assembly as described in claim 9.

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