CN113572232A

CN113572232A - Charging circuit and mobile terminal

Info

Publication number: CN113572232A
Application number: CN202110841415.1A
Authority: CN
Inventors: 张建志; 郭常亮; 窦永清
Original assignee: Chongqing Chuanyin Technology Co ltd
Current assignee: Chongqing Chuanyin Technology Co ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2021-10-29

Abstract

The application discloses charging circuit and mobile terminal, this charging circuit includes: an electrical connector; a microprocessor; the power supply processing integrated circuit comprises a first data interface and a second data interface, wherein the first data interface is used for being electrically connected with the microprocessor, and the second data interface is used for being electrically connected with the electric connector; the power supply processing integrated circuit is used for converting a second data signal output by external equipment into a first data signal matched with the level of the microprocessor and outputting the first data signal to the microprocessor through the first data interface; and/or converting the first data signal output by the microprocessor into a second data signal matched with the level of the external equipment and outputting the second data signal to the external equipment through a second data interface. The method and the device can reduce resource overhead and/or wiring quantity and simplify system design.

Description

Charging circuit and mobile terminal

Technical Field

The application relates to the technical field of mobile terminals, in particular to a charging circuit and a mobile terminal.

Background

With the wide application of the intelligent terminal, the user's demand for fast charging is also increasing, and fast charging generally requires communication between the processor and the power adapter of the intelligent terminal, and in the process of designing and implementing the present application, the inventor finds that at least the following problems exist: the level of the communication interface of the power adapter and the level of the communication interface of the processor in the intelligent terminal may be different, so that direct communication between the intelligent terminal and the power adapter cannot be realized.

The foregoing description is provided for general background information and is not admitted to be prior art.

Disclosure of Invention

The present application provides a charging circuit and a mobile terminal, which are used to reduce resource overhead and/or the number of wires and simplify system design.

To achieve the above object, the present application proposes a charging circuit, which includes:

an electrical connector;

a microprocessor;

a power processing integrated circuit comprising a first data interface for electrical connection with the microprocessor and a second data interface for electrical connection with the electrical connector, optionally,

the power supply processing integrated circuit is used for converting a second data signal output by the external equipment into a first data signal matched with the level of the microprocessor and outputting the first data signal to the microprocessor through the first data interface; and/or converting the first data signal output by the microprocessor into a second data signal matched with the level of the external equipment, and outputting the second data signal to the external equipment through the second data interface.

Optionally, the power supply processing integrated circuit includes:

the level conversion circuit is arranged between the first data interface and the second data interface in series; the level conversion circuit has a connection state and a disconnection state, and when the level conversion circuit is in the connection state, the level conversion circuit controls the first data interface and the second data interface to be electrically connected, and mutually converts the first data signal and the second data signal and outputs the first data signal and the second data signal to the first data interface; and when the level conversion circuit is in a disconnected state, the first data interface and the second data interface are controlled to be disconnected from the electrical connection.

Optionally, the level shift circuit includes a level shifter and a control register, the level shifter is serially connected between the first data interface and the second data interface, a detection end of the control register is connected to the microprocessor, and an output end of the control register is connected to a control end of the level shifter; alternatively,

the control register is used for controlling the level shifter to switch on/off the first data interface and the second data interface according to a control signal output by the microprocessor so as to enable the level shifter circuit to work in a switching-on state or a switching-off state;

optionally, the microprocessor is configured to set or reset the control register through the first data interface;

optionally, the control register is further configured to control the level shifter to switch on the first data interface and the second data interface, and control the level shifter to operate in an off state after the level shifter maintains the on state for a first preset time period.

Optionally, the electrical connector is a USB connector, and a data end of the USB connector is connected to the second data interface and a data end of the microprocessor respectively.

Optionally, the charging circuit further includes a connection detection circuit, a detection end of the connection detection circuit is connected to the electrical connector, and an output end of the connection detection circuit is connected to the microprocessor; the connection detection circuit is used for detecting the interface type of external equipment accessed by the electric connector and outputting a connection detection signal;

and the microprocessor is used for controlling the level conversion circuit to be switched from an off state to an on state when the interface type of the external equipment is determined to be a data interface according to the connection detection signal.

Optionally, the microprocessor is further configured to control the level shift circuit to maintain a disconnected state when it is determined that the interface type of the external device is a preset interface according to the connection detection signal; and/or controlling the level conversion circuit to maintain a disconnected state when the external equipment is determined not to be accessed according to the connection detection signal.

Optionally, the power supply processing integrated circuit further comprises a pull-up circuit, and the pull-up circuit is connected with the second data interface;

the microprocessor is further used for controlling the pull-up circuit to be electrically connected with the second data interface when the connection detection signal determines that the interface type of the external equipment is a data interface;

and when the interface type of the external equipment is determined to be a preset interface and/or the external equipment is not accessed according to the connection detection signal, controlling the pull-up circuit to be disconnected from the second data interface.

Optionally, the pull-up circuit includes a pull-up resistor and a control switch, one end of the pull-up resistor is connected to a first dc power supply, the other end of the pull-up resistor is connected to an input end of the control switch, an output end of the control switch is connected to the second data interface, and the microprocessor controls the control switch.

Optionally, the power supply processing integrated circuit is a charging chip and/or a power supply manager.

Optionally, when the power processing integrated circuit is a charging chip, a power converter is integrated in the charging chip, and an input end of the power converter is connected with a power transmission end of the electrical connector; and the power converter is used for performing electric energy conversion processing on the electric energy output by the external equipment.

The present application further provides a mobile terminal, which is characterized by including any one of the charging circuits described above.

Optionally, the mobile terminal further includes:

the shell is provided with an electric connector interface for installing an electric connector of the charging circuit; the shell is also provided with an accommodating cavity;

the electric control board is accommodated in the accommodating cavity, and the charging circuit is arranged on the electric control board;

and the energy storage assembly is accommodated in the accommodating cavity and is connected with the output end of the charging circuit.

According to the power supply processing integrated circuit, the power supply processing integrated circuit has the level capability of being matched with the voltage of external equipment and also has the level capability of being matched with a microprocessor, and the power supply processing integrated circuit is integrated with two data interfaces, namely a first data interface and a second data interface. Optionally, the second data interface is connected to an external device through an electrical connector so as to receive a data signal of the external device or send a data signal of the microprocessor to the external device. First data interface is connected with microprocessor, can receive the data signal that microprocessor needs to send to external equipment, perhaps with the data signal transmission of the external equipment who receives to microprocessor, this application embodiment realizes microprocessor's charge control based on power processing integrated circuit, and realize microprocessor and external equipment's communication connection, and need not to set up two data interfaces on setting up microprocessor and occupy microprocessor's interface, reduce resource overhead and/or walk line quantity, simplify system design, in addition this application need not to set up independent level conversion circuit, can be under the limited condition of main control panel installation space, save level conversion circuit's area and cost, make the PCB board layout degree of difficulty of main control panel reduce.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic hardware structure diagram of a mobile terminal implementing various embodiments of the present application;

fig. 2 is a communication network system architecture diagram according to an embodiment of the present application;

fig. 3 is a schematic circuit diagram of a charging circuit according to a first embodiment of the present application;

fig. 4 is a schematic circuit diagram of a charging circuit according to a second embodiment of the present application;

fig. 5 is a schematic circuit diagram of a charging circuit according to a third embodiment of the present application;

fig. 6 is a schematic circuit diagram of a charging circuit according to a fourth embodiment of the present application.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Electrical connector	331	Level shifter
20	Microprocessor	332	Control register
				30	Power supply processing integrated circuit	34	Pull-up circuit
31	First dataInterface	35	Power converter
				32	Second data interface	40	Connection detection circuit
33	Level conversion circuit	200	Energy storage assembly

The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

Alternatively, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the recitation of an element by the phrase "comprising an … …" does not exclude the presence of additional like elements in the process, method, article, or apparatus that comprises the element, and optionally, identically named components, features, and elements in different embodiments of the present application may have different meanings, as may be determined by their interpretation in the embodiment or by their further context within the embodiment.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope herein. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context. Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used in this specification, specify the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, steps, operations, elements, components, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "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. b and C ". An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.

It should be understood that, although the steps in the flowcharts in the embodiments of the present application are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders unless otherwise indicated herein. Moreover, at least some of the steps in the figures may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, in different orders, and may be performed alternately or at least partially with respect to other steps or sub-steps of other steps.

Optionally, step numbers such as S100 and S200 are used herein for the purpose of more clearly and briefly describing the corresponding content, and do not constitute a substantial limitation on the sequence, and those skilled in the art may perform S100 and then S200, or may perform S200 and then S100, etc. in the specific implementation, but these shall be within the protection scope of the present application.

It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for the convenience of description of the present application, and have no specific meaning in themselves. Thus, "module", "component" or "unit" may be used mixedly.

The mobile terminal can be implemented in various forms. For example, the mobile terminal described in the present application may include mobile terminals such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and fixed terminals such as a Digital TV, a desktop computer, and the like.

The following description will be given taking a mobile terminal as an example, and those skilled in the art will understand that the configuration according to the embodiment of the present application can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.

Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present application, the mobile terminal 100 may include: RF (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, microprocessor 110, and power supply 111. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, which may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The following describes each component of the mobile terminal in detail with reference to fig. 1:

the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the microprocessor 110; in addition, the uplink data is transmitted to the base station. Typically, 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, and the like. Alternatively, the radio frequency unit 101 may also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CD-a2000(Code Division Multiple Access 2000), WCD-a (Wideband Code Division Multiple Access), TD-SCD-a (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division multiplexing-Long Term Evolution, TDD Long Term Evolution), and the like.

WiFi belongs to short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is optional and not necessarily constituent of the mobile terminal, and may be omitted entirely as needed within a scope that does not change the essence of the application.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.

The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics Processing Unit 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a charging circuit) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.

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 that may adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that may turn off the display panel 1061 and/or the backlight when the mobile terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.

The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Alternatively, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. Optionally, the touch detection device detects a touch orientation of a user, detects a signal caused by a touch operation, and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. Alternatively, the touch panel 1071 may be implemented in various types, such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. Optionally, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited thereto.

Alternatively, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although the touch panel 1071 and the display panel 1061 are shown in fig. 1 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.

The interface unit 108 serves as an interface through which at least one external device is 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 having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices 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 external devices.

The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a program storage area and a data storage area, and optionally, the program storage area may store an operating system, an application program (such as a sound playing function, an image playing function, and the like) required by at least one function, and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Optionally, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; optionally, the processor 110 may integrate an application processor and a modem processor, optionally, the application processor primarily handles operating systems, user interfaces, applications, etc., and the modem processor primarily handles wireless communications. Alternatively, the modem processor may not be integrated into the processor 110.

The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and optionally, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to implement functions of managing charging, discharging, and power consumption via the power management system.

Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.

In order to facilitate understanding of the embodiments of the present application, a communication network system on which the mobile terminal of the present application is based is described below.

Referring to fig. 2, fig. 2 is an architecture diagram of a communication Network system according to an embodiment of the present disclosure, where the communication Network system is an LTE system of a universal mobile telecommunications technology, and the LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and an IP service 204 of an operator, which are in communication connection in sequence.

Optionally, the UE201 may be the terminal 100 described above, and is not described herein again.

The E-UTRAN202 includes eNodeB2021 and other eNodeBs 2022, among others. Alternatively, the eNodeB2021 may be connected with other enodebs 2022 through a backhaul (e.g., X2 interface), the eNodeB2021 is connected to the EPC203, and the eNodeB2021 may provide the UE201 access to the EPC 203.

The EPC203 may include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving gateway) 2034, a PGW (PDN gateway) 2035, and a PCRF (Policy and Charging Rules Function) 2036, and the like. Optionally, the MME2031 is a control node that handles signaling between the UE201 and the EPC203, providing bearer and connection management. HSS2032 is used to provide registers to manage functions such as home location register (not shown) and holds subscriber specific information about service characteristics, data rates, etc. All user data may be sent through SGW2034, PGW2035 may provide IP address assignment for UE201 and other functions, and PCRF2036 is a policy and charging control policy decision point for traffic data flow and IP bearer resources, which selects and provides available policy and charging control decisions for a policy and charging enforcement function (not shown).

The IP services 204 may include the internet, intranets, IMS (IP Multimedia Subsystem), or other IP services, among others.

Although the LTE system is described as an example, it should be understood by those skilled in the art that the present application is not limited to the LTE system, but may also be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, and future new network systems.

The application provides a charging circuit, this charging circuit can be applicable to cell-phone, panel computer, audio amplifier, game machine, intelligent wearing equipment, like in mobile terminal equipment such as intelligent bracelet, intelligent wrist-watch, charging circuit is arranged in the energy storage component 200 for mobile terminal, for example the battery charges to make energy storage component 200 can supply power for the load in the mobile terminal equipment, for example main control board, display screen, camera, speaker etc..

In some implementations, the mobile terminal may be compatible with a fast charging technology and a standard charging technology, and output electric energy of corresponding power to perform a charging mode for charging the mobile terminal of the model for a specific brand of the mobile terminal. Before and during charging, the mobile terminal usually communicates with a charging device, such as a power adapter, a computer, a mobile power supply, etc., to implement signal interaction, such as a charging mode, a charging requirement, etc., of the mobile terminal device. Optionally, based on the charging protocol of the mobile terminal device, the mobile terminal device communicates with the external device by sending a communication packet, and specifically may communicate with the charging device. Alternatively, the communication packet may include, but is not limited to, an energy demand packet, a received energy packet, a mobile terminal ID packet, a version packet, a rated power packet, a charging instruction packet, and the like, and the above information is transmitted to the charging device through the communication interface. The communication packet of the charging device may include, but is not limited to, a charging device ID packet, a version packet, a transmission power packet, etc. to be output to the mobile terminal. When communication is performed through the communication interface, situations may occur in which the communication interface is not matched, such as interface type mismatch, or interface voltage mismatch, etc.

In some implementations, the following two types of data interfaces are mainly used for communication:

the first is to adopt PD protocol to communicate on CC signal of type-C interface, this communication mode mobile terminal and power adapter need to use type C interface, or use the interface of the non-standard;

the second TYPE is that the D + D-line in the USB cable (data line) is adopted for communication, the scheme has no requirement on a preset interface (such as a USB interface), the power adapter can adopt a standard TYPE-A port and can also use a TYPE-C port, the micro USB port and the TYPE-C port can be used on the side of the mobile terminal, and the data line is also universal. The D + D-signal lines can communicate with a power adapter through a serial interface such as a USB bus, a data bus or a UART. The mobile terminal adopts a data bus to communicate with the power adapter, and data is transmitted through a D + D-signal line of the USB cable. On the terminal, the preset interface can be used as a charging interface and also can be used as a communication interface. D + D-signals on a preset interface of the terminal can be switched to a USB PHY or a data interface through a double-pole double-set switch. When a USB device such as a PC or a USB flash disk is connected, the D + D-of the terminal is switched to a USB PHY, and when the terminal is connected with a charging device supporting data communication, such as a quick-charging power adapter, the D + D-of the terminal is switched to a data circuit, and the terminal communicates with the power adapter through a data bus.

In some implementations, a Dedicated power adapter adapted to support a Dedicated Charging Port (DCP) is further provided in the mobile terminal, the Dedicated power Port is one of three power ports defined by USB Charging specification-BC 1.2 fast Charging protocol, and the other two power ports defined by BC1.2 fast Charging protocol are a Standard Downstream Port (SDP) and a power Downstream Port (CDP). However, the data interface level of the power adapter and the data interface level of the microprocessor 20 in the terminal are not identical, so that direct communication between the charging device and the mobile terminal is not possible.

In order to solve the above problem, referring to fig. 3 to 6, an embodiment of the present application provides a charging circuit, including:

an electrical connector 10 for electrically connecting with an external device to transmit a data signal;

a microprocessor 20;

a power processing integrated circuit 30, said power processing integrated circuit 30 comprising a first data interface 31 and a second data interface 32, said first data interface 31 being adapted to electrically connect with said microprocessor 20, said second data interface 32 being adapted to electrically connect with said electrical connector 10; alternatively,

the power supply processing integrated circuit 30 is configured to convert a second data signal output by the external device into a first data signal matched with a level of the microprocessor 20, and output the first data signal to the microprocessor 20 through the first data interface 31; and/or, converting the first data signal output by the microprocessor 20 into a second data signal matched with the level of the external device, and outputting the second data signal to the external device through the second data interface 32.

In this embodiment, the electrical connector 10 can implement connection between an external device and a mobile terminal, and when the charging circuit is applied to the mobile terminal, the charging circuit is electrically connected to the external device that can be the mobile terminal through the electrical connector 10, so as to access electric energy output by the external device through the electrical connector 10, and meanwhile, communication connection between the microprocessor 20 and the external device can also be implemented through the electrical connector 10. Optionally, when the mobile terminal receives a signal, a second data signal output by the external device is output to the power processing integrated circuit 30 through the electrical connector 10 and the second data interface 32, and is converted into a first data signal by the power processing integrated circuit 30, and then is output to the microprocessor 20 through the first data interface 31. When the mobile terminal sends a signal, the first data signal output by the microprocessor 20 is output to the power processing integrated circuit 30 through the first data interface 31, and is converted into a second data signal by the power processing integrated circuit 30, and then is output to an external device through the second data interface 31 and the electrical connector 10.

Alternatively, the first data interface 31 and the second data interface 32 may be I2C interfaces, that is, the electrical connector 10 and the power supply processing integrated circuit 30 may communicate with each other via an I2C bus between the microprocessor 20 and the power supply processing integrated circuit 30.

The electrical connector 10 may include a power terminal VBUS for providing power, and a data terminal for transmitting data signals, i.e., communicating information with the mobile terminal. In this embodiment, the electrical connector 10 may be a USB interface, and in other embodiments of the present application, the electrical connector 10 may also be a Tpye-C interface or other types of interfaces. Optionally, the power terminal VBUS is denoted as VBUS, and the electrical connector 10 may further include a ground terminal, and the power terminal and the ground terminal are electrically connected to the charging device respectively. The power supply terminal VBUS of the electrical connector 10 is connected to the power output terminal of the external device and the power input terminal of the power processing ic 30, so that when the external device charges the mobile terminal, the charging circuit of the charging device outputs the electrical energy to the power input terminal of the power processing ic 30 through the power supply terminal VBUS, thereby implementing the storage of the electrical energy.

The data terminal comprises a first data pin represented by D + and a second data pin represented by D-, the first data pin D + and the second data pin D-can realize bidirectional interaction of signals between the mobile terminal and the charging device, the mobile terminal can send a charging request to the charging device through the first data pin D + and the second data pin D-so that the charging device can provide corresponding charging electric energy to the mobile terminal according to the charging request, and in the charging process, the mobile terminal can also send a charging condition to the charging device so that the charging device can adjust output voltage, output current and the like according to the charging condition.

The power supply processing integrated circuit 30 is configured to convert the electric energy output by the charging circuit of the charging device into electric energy required by the mobile terminal, and output the electric energy to the energy storage device of the mobile terminal for storage. Alternatively, the power supply processing integrated circuit 30 may perform DC-DC conversion, filtering, and the like on the electric power output from the charging circuit of the charging device. The power supply processing ic 30 may adjust the charging current and the charging voltage during charging, so that the energy storage component 200 may be charged in different stages. Optionally, the charging process of the power processing integrated circuit 30 includes, but is not limited to, a pre-charging phase, a constant current charging phase, and a constant voltage charging phase. A pre-charge stage for pre-charging (restorative charging) the fully discharged battery cells. The pre-charging is usually performed when the battery voltage is lower than about 3V. And a constant current charging stage, when the battery voltage rises to a preset charging threshold value, for example 3V, increasing the charging current to perform constant current charging. In the constant current charging stage, the battery voltage gradually rises along with the constant current charging process.

The microprocessor 20 may be a control center of the charging circuit, which is specially used for controlling the charging of the mobile terminal, or may be a control center of the mobile terminal, when the microprocessor 20 is the control center of the charging circuit, the mobile terminal further includes a processor 101, and the microprocessor 20 and the processor 101 may be in communication connection. When the microprocessor 20 is a control center of the mobile terminal, the mobile terminal can also be connected to other terminals, such as a computer, through the electrical connector 10, so as to transmit audio, video, text, symbols, and other information while charging is being performed. Optionally, the power processing integrated circuit 30 is controlled by the microprocessor 20, the power processing integrated circuit 30 is integrated with the first data interface 31, and the corresponding microprocessor 20 is also integrated with a data interface, and the two are in communication connection through a data bus, and in the charging process, the power processing integrated circuit 30 works in different charging stages according to a control signal of the microprocessor 20 to complete charging of the mobile terminal.

It should be noted that the interface operating voltage of the external device may be 3.3V or higher, the power supply of the microprocessor 20 as a microprocessor of the mobile terminal, for example, a microprocessor of a mobile phone, is usually 1.2V or 1.8V, and the data interface level of the microprocessor 20 is not compatible with the level above 1.8V. Or, the levels defined in the interface protocol between the external device and the mobile terminal are different, so that there may be a situation where direct adaptation is not possible between the external device and the mobile terminal.

For this purpose, the power supply processing integrated circuit 30 is provided, the power supply processing integrated circuit 30 has the capability of matching the level of the external device and the level of the microprocessor 20, and the power supply processing integrated circuit 30 is integrated with two data interfaces, namely a first data interface 31 and a second data interface 32. Alternatively, the second data interface 32 is connected to an external device through the electrical connector 10, thereby receiving a data signal of the external device or transmitting a data signal of the microprocessor 20 to the external device. The first data interface 31 is connected to the microprocessor 20 and can receive a data signal that the microprocessor 20 needs to transmit to an external device or transmit the received data signal of the external device to the microprocessor 20. For convenience of description, the data signal of the microprocessor 20 side is defined as a first data signal, and the data signal of the external device side is defined as a second data signal. Here, the data signals received and transmitted by the microprocessor 20 are collectively represented by the first data signals, and similarly, the data signals received and transmitted by the external device side are collectively represented by the second data signals. Under the action of the power processing integrated circuit 30, the first data signal is converted into a second data signal and then output to the external device, and the second data signal is also converted into the first data signal and then output to the microprocessor 20. It will be appreciated that the microprocessor 20 may implement charging control of the power processing integrated circuit 30 and communication connection with external devices through the first data interface 31. That is, the first data interface 31 can realize multiplexing of two functions, and it is not necessary to separately provide a data interface for external terminal connection to the microprocessor 20.

In one embodiment, the external device is a power adapter, and in the operating condition of charging the mobile terminal, after the connection between the mobile terminal and the power adapter is established, the power adapter may send the second data signal, which is specifically the charging parameter request, to the power processing integrated circuit 30 through the second data interface 32, and the power processing integrated circuit 30, after level conversion, converts the second data signal into the first data signal, which is specifically the charging parameter request, the charging parameter request may be a charging voltage and/or a charging current characterizing a need of the mobile terminal, the mobile terminal in particular being a first data signal generating charging response information, and sends the charging response information to the power processing integrated circuit 30, and the charging response information is converted into a second data signal, which is specifically the charging response information, by the power processing integrated circuit 30 and then output to the power adapter through the second data interface 32. And after the power adapter receives the converted charging response information, the charging circuit of the power adapter method charges the mobile terminal according to the charging voltage and/or the charging current confirmed in the charging response information.

Based on this, compared with the scheme that the independent level conversion circuit 33 is arranged, two data interfaces are arranged on the microprocessor 20 and are respectively connected with the power processing integrated circuit 30 and the level conversion circuit 33 so as to control the charging of the power processing integrated circuit 30 through one data interface and are connected with the external device through the other data interface and the level conversion circuit 33, the embodiment of the application realizes the charging control of the microprocessor 20 and the communication connection of the microprocessor 20 and the external device based on the power processing integrated circuit 30, and does not need to arrange two data interfaces on the microprocessor 20 to occupy the interface of the microprocessor 20, thereby reducing the resource overhead and/or the number of wires and simplifying the system design, in addition, the application does not need to arrange the independent level conversion circuit 33, and can save the area and the cost of the level conversion circuit 33 under the condition that the installation space of the main control panel is limited, the layout difficulty of the PCB of the main control board is reduced.

Referring to fig. 3 to 6, in an embodiment, the power processing integrated circuit 30 includes:

a level shift circuit 33, wherein the level shift circuit 33 is serially arranged between the first data interface 31 and the second data interface 32; the level shift circuit 33 has an on state and an off state, and when the level shift circuit 33 is in the on state, the level shift circuit controls the first data interface 31 and the second data interface 32 to be electrically connected, and the level shift circuit converts the first data signal and the second data signal to each other and outputs the converted first data signal and the converted second data signal to the first data interface 31; when the level shift circuit 33 is in the off state, the first data interface 31 and the second data interface 32 are controlled to be electrically disconnected.

In this embodiment, when the mobile terminal and the external device need to be connected in a communication manner, the level shift circuit 33 works in a connection state, and at this time, the first data interface 31 and the second data interface 32 are electrically connected, specifically, a coupling connection is adopted, after the first data interface 31 and the second data interface 32 are electrically connected, and when the microprocessor 20 needs to send charging information or other data signals to the external device, the charging information or other data signals are output to the first data interface 31, and then the first data interface 31 couples the data signals to the second data interface 32, so that the signals are transmitted to the external device through the second data interface 32, thereby realizing the transmission of the data signals. Similarly, when the external device is required to send the charging information or other data signals to the microprocessor 20, the charging information or other data signals are output to the second data interface 32, and then the second data interface 32 couples the data signals to the first data interface 31, so that the signals are transmitted to the microprocessor 20 through the first data interface 31, and the data signals are transmitted. When the level shift circuit 33 is in the off state, the first data interface 31 and the second data interface 32 are electrically disconnected, and the external device cannot be communicatively connected to the mobile terminal through the first data interface 31 and the second data interface 32.

It can be understood that, when the level shift circuit 33 is in the on state, the mobile terminal needs to supply power to the mobile terminal, and when the mobile terminal does not access an external device, if the level shift circuit 33 works in the on state for a long time, energy loss of the mobile terminal is easily caused.

Referring to fig. 4 or fig. 5, in an embodiment, the level shift circuit 33 includes a level shifter 331 and a control register 332, the level shifter 331 is serially disposed between the first data interface 31 and the second data interface 32, a detection terminal of the control register 332 is connected to the microprocessor 20, and an output terminal of the control register 332 is connected to a control terminal of the level shifter 331; optionally, the control register 332 is configured to control the level shifter 331 to switch on/off the first data interface 31 and the second data interface 32 according to a control signal output by the microprocessor 20, so that the level shifting circuit 33 operates in an on state or an off state.

The level shifter 331 may be implemented by a switching tube, a comparator, and the like, and the level shifter circuit 33 may be integrated inside the integrated circuit 30 by an integrated process, such as a semiconductor manufacturing process, a chip mounting process, a plastic package process, and the like. The control register 332 is controlled by the microprocessor 20, the microprocessor 20 can send an on/off control signal to the control register 332, the control register 332 can Enable (Enable) the level shifter 331 or disable (disable) the level shifter 331, and upon receiving the on control signal, the control register 332 operates in an on state and controls the level shifter 331 to operate (Enable), so as to realize the electrical connection between the first data interface 31 and the second data interface 32, and Enable the data signal to be coupled and transmitted between the first data interface 31 and the second data interface 32. When receiving the off control signal, the control register 332 operates in an off state and controls the level shifter 331 to stop operating (not enabled), thereby disconnecting the electrical connection between the first data interface 31 and the second data interface 32. In practical applications, before the mobile terminal communicates with an external device connected to the electrical connector 10, such as a power adapter, the microprocessor 20 may set the control register 332 to the on state, so that the level shifter circuit 33 is enabled, and at this time, the processor 101 of the microprocessor 20 may communicate with the power adapter through the level shifter 331 in the power processing circuit.

In this embodiment, the control register 332 may be set or reset by the microprocessor 20 via the first data interface 31. When the microprocessor 20 sets the control register 332 via the first data interface 31, the control register 332 may be set to the on state, thereby enabling the level shift circuit 33. When the microprocessor 20 resets the control register 332 via the first data interface 31, the control register 332 may be set to the off state, thereby disabling the level shift circuit 33.

Referring to fig. 4 or fig. 5, in an embodiment, the control register 332 is further configured to control the level shifter 331 to switch on the first data interface 31 and the second data interface 32, and control the level shifter 331 to operate in the off state after the on state is maintained for a first preset time period.

It is understood that when the first data interface 31 and the second data interface 32 are in the electrical connection state, data may not need to be transmitted between the mobile terminal and the external device, or data between the mobile terminal and the external device is small, and data transmission can be completed within a certain time, and when data transmission is not needed or the data transmission is in the idle state, the first data interface 31 and the second data interface 32 are in the idle state. To reduce power consumption of the power processing integrated circuit 30 itself, energy is conserved, while reducing signal interference, such as on a data bus. In this embodiment, after the control register 332 controls the level shifter 331 to operate in the on state, that is, the first data interface 31 and the second data interface 32 are electrically connected for the first duration, the level shifter circuit 33 is controlled to switch from the on state to the off state, so that the first data interface 31 and the second data interface 32 are electrically disconnected. Optionally, the first preset time period may be a time period during which the mobile terminal and the external device do not perform data transmission within the time period, for example, the mobile terminal only accesses the external device and does not need to transmit data and charge, or may be a time period required for completing data transmission between the mobile terminal and the external device, for example, a time period required to be spent is determined according to a data size, or may be a time period required for completing charging.

Referring to fig. 4 or 5, in an embodiment, the electrical connector 10 is a USB connector, and a data terminal of the USB connector is connected to the second data interface 32 and a data terminal of the microprocessor 20, respectively.

The first data interface 31 comprises a first port and a second port, the first port is a data signal terminal SDA1 of the data bus, and the second port is a time signal terminal SCL1 of the data bus. The second data interface 32 comprises a third port and a fourth port, the third port is a data signal terminal SDA2 of the data bus, and the fourth port is a clock signal terminal SCL2 of the data bus.

The third port is multiplexed on the D + (or D-) of the USB charging interface, and the fourth port is multiplexed on the D- (or D +) of the USB charging interface. Alternatively, the USB PHY interface of microprocessor 20 has two ports, D + and D-, with the D + of the USB PHY connected to the D + port of the USB connector, and the clock signal side SLA2 of second data interface 32 of power processing integrated circuit 30 also connected to the D + port of the USB interface. The D-port of the USB PHY is connected to the D-port of the USB connector, while the data signal port SDA2 port of the power supply processing integrated circuit 30 is also connected to the D-port of the USB connector.

The USB phy interface with the microprocessor 20 via the second data interface 32 is multiplexed onto the D + (or D-) of the USB charging interface, and the fourth interface is multiplexed onto the D- (or D +) of the USB charging interface. The mobile terminal may be connected to at least two external devices, the first type may specifically be a power adapter with a data interface, such as a fast charging power adapter for implementing fast and fast charging, and the second type may specifically be a USB device such as a PC or a USB disk. When the external device is a fast charging power adapter with a data interface, the fast charging power adapter realizes a data interface communication connection with the microprocessor 20 through the second data interface 32 and the first data interface 31 of the power processing integrated circuit 30. When the external device is a fast charging power adapter with a data interface, the fast charging power adapter is directly connected with the data interface of the microprocessor 20 through the electrical connector 10.

Based on this, this application need not to set up the double pole double switch, and rethread double switch switches to USB PHY or data interface, this application can realize the electrical connection on/off of second data interface 32 and first data interface 31 through the operating condition of control level converter 331, and then realizes the gating of interface, can reduce resource overhead and/or walk line quantity, simplify system design, in addition this application can also be under the limited circumstances of master control board installation space, area and the cost of double pole double switch can be saved in this application embodiment, make the PCB board layout degree of difficulty of master control board reduce.

Referring to fig. 6, in an embodiment, the charging circuit further includes a connection detection circuit 40, a detection terminal of the connection detection circuit 40 is connected to the electrical connector 10, and an output terminal of the connection detection circuit 40 is connected to the microprocessor 20; the connection detection circuit 40 is configured to detect an interface type of an external device connected to the electrical connector 10 and output a connection detection signal.

In this embodiment, the connection detection circuit 40 may be a voltage detection circuit, for example, a voltage detection circuit including a voltage dividing resistor, or a comparison control circuit including a comparator and an ADC converter. The voltage detection circuit can detect the current voltage value of the electric connector 10 connected to the external equipment; the microprocessor 20 may identify the interface type of the current peripheral device according to the current voltage value and a preset mapping relationship table between different voltage values and different interface types. It should be noted that when external devices with different communication interfaces are connected to the electrical connector 10, the voltage values detected by the voltage detection circuit may be different. Therefore, in the present embodiment, the mapping relationship table pre-stored in the microprocessor 20 defines the corresponding relationship between each interface type and the voltage value in advance, and then the interface type corresponding to the actual voltage value can be searched in the mapping relationship table, so as to determine the current peripheral interface type. In other embodiments, the electrical connector 10 may further be provided with an identification pin connection, and the connection detection circuit 40 may determine whether to connect an external device and the type of the connected external device according to the level of the identification pin or the magnitude of the voltage.

When determining that the interface type of the external device is a data interface according to the connection detection signal, the microprocessor 20 controls the level conversion circuit 33 to switch from an off state to an on state; when determining that the interface type of the external device is a preset interface (such as a USB interface) according to the connection detection signal, the microprocessor 20 controls the level conversion circuit 33 to maintain a disconnected state; and/or, when it is determined that the external device is not connected according to the connection detection signal, controlling the level shift circuit 33 to maintain the disconnected state.

Referring to fig. 4 or 5, in an embodiment, the power processing integrated circuit 30 further includes a pull-up circuit 34, and the pull-up circuit 34 is connected to the second data interface 32;

the microprocessor 20 is further configured to control the pull-up circuit 34 to be electrically connected to the second data interface 32 when the connection detection signal determines that the interface type of the external device is a data interface;

and controlling the pull-up circuit 34 to disconnect the electrical connection with the second data interface 32 when the connection detection signal determines that the interface type of the external device is a preset interface, such as a USB interface, and/or the external device is not accessed.

Optionally, the pull-up circuit 34 includes a pull-up resistor and a control switch, one end of the pull-up resistor is connected to the first dc power supply, the other end of the pull-up resistor is connected to an input end of the control switch, an output end of the control switch is connected to the second data interface 32, a controlled end of the control switch is connected to the microprocessor 20, and the microprocessor 20 controls the control switch.

In this embodiment, when the level shift circuit 33 is operated in the on state to realize the electrical connection between the first data interface 31 and the second data interface 32, the microprocessor 20 controls the control switch to be closed, so that the pull-up resistor is connected between the first data interface 31 and the second data interface 32, and when the level shift circuit 33 is operated in the off state to control the first data interface 31 and the second data interface 32 to be disconnected, the microprocessor 20 controls the control switch to be opened, so that the pull-up resistor is connected between the first data interface 31 and the second data interface 32. Therefore, the data signals transmitted on the first data interface 31 and the second data interface 32 can be pulled up, and meanwhile, the power consumption of the power supply processing circuit can be reduced, so that energy conservation and emission reduction are realized. Alternatively, the number of the pull-up resistors may be two, or two or more, when two are provided, the two pull-up resistors are respectively connected with the data signal terminal SDA2 and the clock signal terminal SCL2 of the second data interface 32, and when two are provided, the two or more pull-up resistors may be provided in two groups, each group of the pull-up resistors includes at least two pull-up resistors, and each group of the pull-up resistors may be respectively provided on the data signal terminal SDA2 and the clock signal terminal SCL2 of the second data interface 32 by serial connection, parallel connection, or the like.

Referring to fig. 5, in one embodiment, the power processing integrated circuit 30 is a charging chip and/or a power manager.

In this embodiment, the charging chip and the power manager have data interfaces, and can realize communication connection with the microprocessor 20 through the data interfaces and the bus, and the charging chip and the power manager can perform DC-DC conversion on the electric energy output of the accessed external device, for example, after processing such as step-down, step-up-step-down, rectification, filtering, and the like, store the electric energy to the energy storage component 200 of the mobile terminal, thereby realizing storage of the electric energy. Optionally, the power manager may also be used as a power management device of the mobile terminal to implement power distribution, conversion, and the like of the whole mobile terminal, so as to provide working voltages for other loads in the mobile terminal, such as a display module, a main control panel, a speaker, a microphone, and the like.

Optionally, when the power processing integrated circuit 30 is a charging chip, a power converter 35 is integrated in the charging chip, and an input terminal of the power converter 35 is connected to the power transmission terminal of the electrical connector 10; the power converter 35 is configured to perform power conversion processing on the electric energy output by the external device, so as to supply power to the external device. The power supply processing generally comprises power supply characteristic matching or converting the electric energy of the energy storage assembly into the electric energy required by the external equipment to supply power for the external equipment.

In this embodiment, the charging chip is integrated with a power converter 35, and the power converter 35 is a BUCK type power converter, a BUCK-BOOST type power converter, or a charge pump type power converter.

It is understood that the charging chip and/or the power manager has a charging operation mode, a data transmission operation mode, and a standby mode, in which the charging chip and/or the power manager is charging the energy storage component 200, and the level shift circuit 33 can switch between the on state and the off state or maintain the on state for a preset period. In the data transmission operating mode, the power converter 35 in the charging chip and/or the power manager does not operate, and the level shift circuit 33 can switch between the on state and the off state or maintain the on state for a preset period. When the external device is not connected, the charging chip and/or the power manager can work in a standby mode. Therefore, the charging chip and/or the power manager starts the functional circuit module in the charging chip and/or the power manager according to different working states, and the energy consumption of the charging chip and/or the power manager can be reduced.

The present application also provides a power supply device including the charging circuit as described above.

The power supply device can be a mobile power supply, and can also be a power supply assembly which is arranged on the mobile terminal and supplies power to a load of the mobile terminal. Based on the fact that the power supply device includes the charging circuit as described above, the charging circuit structure and the charging principle of the power supply device are the same as those of the power supply device, and thus, the power supply device includes all technical solutions of all embodiments of the charging circuit, and the achieved technical effects are also completely the same, and all effective effects of the charging circuit are achieved, which is not repeated herein.

The application also provides a mobile terminal comprising the charging circuit.

In this embodiment, based on that the mobile terminal includes the charging circuit 10 as described above, the structure and the charging principle of the charging circuit 10 of the mobile terminal are the same as those of the charging circuit 10, so that the mobile terminal includes all the technical solutions of all the embodiments of the charging circuit, and the achieved technical effects are also completely the same, and all the effective effects of the charging circuit 10 are achieved, which is not described herein again.

Optionally, the mobile terminal further includes:

the charging circuit comprises a shell, wherein an electric connector 10 interface is arranged on the shell, so that the electric connector 10 of the charging circuit can be installed; the shell is also provided with an accommodating cavity;

and the energy storage assembly 200 is accommodated in the accommodating cavity, and the energy storage assembly 200 is connected with the output end of the charging circuit.

In this embodiment, the electronic control board may be implemented by a PCB, a circuit wiring layer is formed on the PCB, and the charging circuit and electronic components of other functional circuit modules in the mobile terminal are mounted on a pad formed by the circuit wiring layer. The housing and the display module may enclose a receiving space, the electric control board and the energy storage module 200 are received in the housing, and the energy storage module 200 may be a rechargeable battery, such as a lithium battery. The charging circuit can be electrically connected with the energy storage assembly 200 through conducting pieces such as conducting wires and an FPC, and the charging circuit is used for outputting electric energy output by external equipment to the energy storage assembly 200 after power supply processing is carried out on the electric energy, and charging and energy storage are carried out on the energy storage assembly 200.

Optionally, the microprocessor 20 in the charging circuit may be the processor 101 in the mobile terminal, and the mobile terminal of the present application implements charging control of the mobile terminal and communication connection between the mobile terminal and an external device based on the power supply processing integrated circuit 30 in the charging circuit, and does not need to set two data interfaces on the microprocessor 20 to occupy an interface of the microprocessor 20, thereby reducing resource overhead and/or the number of wires, and simplifying system design.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes several instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, a controlled terminal, or a network device) to execute the method of each embodiment of the present application.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.

Claims

1. A charging circuit, comprising:

an electrical connector;

a microprocessor;

the power supply processing integrated circuit comprises a first data interface and a second data interface, wherein the first data interface is used for being electrically connected with the microprocessor, and the second data interface is used for being electrically connected with the electric connector.

2. The charging circuit of claim 1, wherein the power processing integrated circuit comprises:

the level conversion circuit is arranged between the first data interface and the second data interface in series; the level shift circuit has an on state and an off state.

3. The charging circuit of claim 2, wherein the level shifter circuit comprises a level shifter and a control register, a detection terminal of the control register is connected to the microprocessor, and an output terminal of the control register is connected to a control terminal of the level shifter; wherein the content of the first and second substances,

the control register is used for controlling the level shifter to be switched on/off with the first data interface and the second data interface according to the control signal output by the microprocessor, and controlling the level shifter to work in a switching-off state after the switching-on state is maintained for a first preset time;

and the microprocessor is used for setting or resetting the control register through the first data interface.

4. The charging circuit of claim 2, further comprising a connection detection circuit, wherein a detection terminal of the connection detection circuit is connected to the electrical connector, and an output terminal of the connection detection circuit is connected to the microprocessor; the connection detection circuit is used for detecting the interface type of external equipment accessed by the electric connector and outputting a connection detection signal; and the microprocessor is used for determining the interface type of the external equipment according to the connection detection signal.

5. The charging circuit of claim 4, wherein the microprocessor is further configured to control the level shifter circuit to maintain an off state when the connection detection signal determines that the interface type of the external device is a preset interface.

6. The charging circuit of claim 4 or 5, wherein the power processing integrated circuit further comprises a pull-up resistor circuit, the pull-up circuit being connected to the second data interface;

the microprocessor is further used for controlling the pull-up resistor circuit to be electrically connected with the second data interface when the connection detection signal determines that the interface type of the external equipment is a data interface;

7. The charging circuit according to claim 6, wherein the pull-up resistor circuit comprises a pull-up resistor and a control switch, one end of the pull-up resistor is connected to a first dc power supply, the other end of the pull-up resistor is connected to an input end of the control switch, an output end of the control switch is connected to the second data interface, and the microprocessor controls the control switch.

8. The charging circuit of claim 7, wherein the power processing integrated circuit is a charging chip and/or a power manager; when the power supply processing integrated circuit is a charging chip, a power converter is integrated in the charging chip, and the input end of the power converter is connected with the power transmission end of the electric connector.

9. A mobile terminal characterized in that it comprises a charging circuit according to any one of claims 1 to 8.

10. The mobile terminal of claim 9, wherein the mobile terminal further comprises: