CN110190641A - Charging control circuit, terminal equipment and data line - Google Patents

Abstract

The embodiment of the invention discloses a charging control circuit, a terminal device and a data line. Wherein, the charging control circuit includes: a detection module, which is used to connect to the first interface of the terminal device, and obtain the current limit value of the data line connected to the first interface; wherein, the first interface includes a Type-C interface, Type-C The interface includes SBU1 pin and SBU2 pin; the control module is used to control the current on the data line during the charging process according to the detection result of the detection module, so that the current does not exceed the current limit of the data line. The embodiment of the present invention ensures that the data lines with different current limit values can charge the terminal equipment under safe conditions, and at the same time reduces the design difficulty and production cost of the data lines.

Description

Charging control circuit, terminal equipment and data line

technical field

The embodiments of the present invention relate to the technical field of terminal equipment, and in particular, to a charging control circuit, a terminal equipment, and a data line.

Background technique

With the increase in frequency of use of terminal devices in daily life, the problem of terminal device charging has become a concern of people. When the terminal device is charging, it can be charged by using the fast charging technology to connect to the power supply through the data cable. In this case, since the charging speed becomes faster, the current flowing through the data line becomes larger, and the larger the current, the higher the temperature rise on the data line. If a terminal device that supports fast charging technology is charged with a data cable that does not support fast charging technology, during the charging process, due to the excessive current flowing through the data cable, there will be a risk of burning the data cable.

At present, in response to this risk, it is mainly to set an identification chip on the data line to indicate the maximum overcurrent capacity that the data line can withstand, so that the terminal equipment can identify it and control the current passing through the data line during the charging process. . However, this solution will increase the manufacturing cost of the data line.

Contents of the invention

Embodiments of the present invention provide a charging control circuit, a terminal device, and a data line, so as to ensure that the data line safely charges the terminal device and solve the problem of high manufacturing cost of the data line.

In order to solve the problems of the technologies described above, the present invention is achieved in that:

In the first aspect, an embodiment of the present invention provides a charging control circuit, which is applied to a terminal device, and the charging control circuit may include:

The detection module is used to connect to the first interface of the terminal device, and obtain the current limit value of the data line connected to the first interface; wherein, the first interface includes a Type-C interface, and the Type-C interface includes SBU1 pins and SBU2 pins foot;

The control module is used to control the current on the data line during the charging process according to the detection result of the detection module, so that the current does not exceed the current limit of the data line.

In a second aspect, an embodiment of the present invention provides a terminal device, including the charging control circuit as mentioned in the first aspect.

In the third aspect, the embodiment of the present invention provides a charging control method, which is applied to the terminal device involved in the second aspect, including:

When the data line is electrically connected to the first interface of the terminal device, the current limit value of the data line connected to the first interface is obtained; wherein, the first interface includes a Type-C interface, and the Type-C interface includes SBU1 pins and SBU2 pins foot;

According to the detection result of the detection module, the current on the data line during the charging process is controlled so that the current does not exceed the current limit of the data line

In a fourth aspect, the embodiment of the present invention provides a Type-C data line, including: a second impedance element, the second impedance element is connected to the second interface of the data line, and is used to communicate with the terminal device at the first interface of the data line After the second interface is connected, a voltage divider circuit is formed; wherein,

The SBU1 pin in the first interface is connected to the SBU1 pin in the second interface;

The SBU2 pin in the second interface is connected to the SBU2 pin in the second interface.

In the embodiment of the present invention, the terminal device sets the charging control circuit at the first interface connected to the data line, so that the charging control circuit and the impedance element in the data line form a voltage divider circuit, and the terminal device obtains the voltage of the voltage divider circuit signal to determine the current limit of the data line, so that the terminal device can control the current on the data line during the charging process, so that the current on the data line does not exceed the current limit of the data line. It can be realized that while the data line charges the terminal equipment under safe conditions, the design difficulty and production cost of the data line are reduced.

Description of drawings

The present invention can be better understood from the following description of specific embodiments of the present invention in conjunction with the accompanying drawings, wherein the same or similar reference numerals represent the same or similar features.

FIG. 1 shows a schematic structural diagram of a charging control circuit according to an embodiment of the present invention;

Fig. 2 shows a circuit structure diagram in a terminal device according to an embodiment of the present invention;

Fig. 3 shows a circuit structure diagram of a data line according to an embodiment of the present invention;

Fig. 4 shows a circuit structure diagram when a terminal device and a data line are connected according to an embodiment of the present invention;

FIG. 5 shows a circuit structure diagram when a terminal device and a data line are connected according to another embodiment of the present invention;

FIG. 6 shows a schematic flowchart of a charging control method according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a hardware structure of a terminal device implementing an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In order to solve the current technical problems, the embodiments of the present invention provide a charging control circuit, a terminal device, a method, and a data line.

Firstly, the charging control circuit provided by the embodiment of the present invention will be described in detail with reference to FIG. 1 .

As shown in FIG. 1 , the charging control circuit 10 applied to a terminal device includes: a detection module 110 and a control module 120 .

Wherein, the detection module 110 is configured to connect with the first interface of the terminal device, and acquire the current limit value of the data line connected with the first interface. Wherein, the first interface may be a Type-C interface, and the Type-C interface further includes SBU (Side banduse) 1 pins and SBU2 pins.

The control module 120 is configured to control the current on the data line during charging according to the detection result of the detection module, so that the current does not exceed the current limit of the data line.

Therefore, in the charging control circuit 10 provided by the embodiment of the present invention, by setting the charging control circuit at the first interface connected to the data line, the charging control circuit and the impedance element in the data line form a voltage divider circuit, and the terminal device obtains The current on the data line during the charging process determines the current limit of the data line, so that the terminal device can control the current on the data line during the charging process, so that the current on the data line does not exceed the current limit of the data line.

In addition, the first interface provided by the embodiment of the present invention may include a charging terminal for charging and a connection terminal for detecting the current limit of the data line. Wherein, the charging terminal for charging may include the VBus pin; the connecting terminal for detecting the current limit of the data line includes the above-mentioned SBU1 pin and SBU2 pin.

The charging control circuit and the data line are further introduced below in combination with FIGS. 2 and 3 respectively.

As shown in FIG. 2 , the detection module 110 in the embodiment of the present invention may specifically include a first impedance element 210 and a voltage sampling circuit 220 .

Wherein, the first impedance element 210 is connected to the first interface 130; the voltage sampling circuit 220 is used to collect the voltage signal of the first interface 130 in the terminal device.

Further, the first impedance element 210 in the embodiment of the present invention includes a pull-down resistor, one end of the pull-down resistor is connected to the first interface 130 , and the other end of the pull-down resistor is connected to the power supply of the terminal device.

Here, in case the first interface 130 is connected to the data line, the first interface 130 is electrically connected to a pull-down resistor provided in the data line.

The first interface 130 of the embodiment of the present invention includes a first connection terminal, the first impedance element includes a first pull-up resistor, and the pull-down resistor includes a first pull-down resistor; one end of the first pull-up resistor is connected to the first connection terminal, and the first pull-up resistor is connected to the first connection terminal. The other end of a pull-up resistor is connected to the power supply. When the first interface 130 is connected to the data line, the first connection terminal is electrically connected to the third connection terminal, and one end of the first pull-down resistor is connected to the third connection terminal. The other end of the resistor is used to connect to an external power supply, wherein the third connection terminal is located at the second interface of the data line.

The first interface 130 of the embodiment of the present invention also includes a second connection terminal, the first impedance element also includes a second pull-up resistor; the pull-down resistor also includes a second pull-down resistor; one end of the second upper resistor is connected to the second connection terminal, The other end of the second pull-up resistor is connected to the power supply of the terminal device. When the first interface 130 is connected to the data line, the second connection terminal is electrically connected to the fourth connection terminal; one end of the second pull-down resistor is connected to the fourth connection terminal, The other end of the second pull-down resistor is used to connect to an external power supply; wherein, the fourth connection terminal is located at the second interface of the data line.

The voltage sampling circuit 220 of the embodiment of the present invention includes a first digital-to-analog converter and a second digital-to-analog converter; wherein, the first digital-to-analog converter is respectively connected to the first connection terminal and the control module; the second digital-to-analog converter is respectively Connect with the second connection terminal and the control module.

The control module 120 is configured to calculate the current limit of the data line according to the detection result of the detection module, and then control the current on the data line during the charging process.

As shown in Figure 3, the embodiment of the present invention provides a data line, the data line includes: a second impedance element 310, the second impedance element 310 is connected to the second interface 320 of the data line, for After the first interface is connected to the second interface 320 of the terminal device, a voltage dividing circuit is formed to detect the current limit of the data line. The SBU1 pin in the first interface is connected to the SBU1 pin in the second interface; the SBU2 pin in the first interface is connected to the SBU2 pin in the second interface. Wherein, the data lines in the embodiments of the present invention can all be Type-C data lines. The second interface can be a Type-C interface

Further, the second impedance element includes a pull-down resistor for connecting with the SBU1 pin and/or the SBU2 pin in the first interface. Further, one end of the pull-down resistor is connected to the SBU1 pin and/or the SBU2 pin in the first interface, and the other end is connected to an external power supply, and the external power supply may include: power provided by the socket.

Here, when the pull-down resistor is set in the data line, the resistance value of the pull-down resistor needs to be configured in advance. Specifically, when the data line is produced, the resistance value of the pull-down resistor is configured according to the different current limit values of the data line. The configuration relationship is mainly that the resistance value of the pull-down resistor is proportional to the current limit value of the data line. The purpose of this is to prevent the terminal equipment from misjudging the current limit of the data line, so as to ensure that the data lines with different current limit values can charge the terminal equipment under safe conditions.

Specifically, when the data line is connected to the terminal device and supplies power to the terminal device, when a short circuit occurs between the charging terminal and the connecting terminal at the connection between the two, the voltage of the connecting terminal will be pulled up by the charging terminal. Here, the terminal device will draw a large current It is better to misidentify a data line with a low current as a data line with a low current than to misidentify a data line with a low current as a data line with a high current. The following is an example to illustrate, when the Vbus pin of the charging terminal in the USB port and the SBU pin of the connecting terminal are short-circuited by foreign objects or liquids, the voltage of the SBU pin will be pulled up by the Vbus pin, and the terminal device will adjust according to the voltage of the SBU pin. , it is determined that the resistance on the data line connected to the terminal device is a large resistance, so as to determine that the current value corresponding to the current limit of the connection line is a small current value, and the terminal device will use the small current value as a standard for the data line during charging. The current on the circuit is controlled, because the small current value does not exceed the maximum current value corresponding to the current limit of the data line, so the data line will not be burned.

In addition, in another example, the pull-down resistor in the above data line can be replaced with a grounding resistor, and the connection mode of the pull-down resistor in the circuit is the same as that of the replaced grounding resistor in the circuit. For details, please refer to the above-mentioned Connection mode and function in an example.

Thus, the terminal device sets the charging control circuit at the first interface connected to the data line, so that the charging control circuit and the impedance element in the data line form a voltage divider circuit, and the terminal device determines the data by obtaining the voltage signal of the voltage divider circuit. The current limit of the data line, so that the terminal equipment can control the current on the data line during the charging process, so that the current on the data line does not exceed the current limit of the data line. It can be realized that while the data line charges the terminal equipment under safe conditions, the design difficulty and production cost of the data line are reduced.

The following describes in detail the case where the terminal device is connected to the data line with reference to FIG. 4 and FIG. 5 .

Fig. 4 shows a circuit structure diagram when a terminal device is connected to a data line according to an embodiment of the present invention.

As shown in Fig. 4, the charging control circuit in the terminal device includes: a detection module and a control module.

Wherein, the detection module includes: at least one pull-up resistor and at least one digital-to-analog converter (Analog-to-Digital Converter, ADC); the control module includes at least one processor, and the embodiment of the present invention uses a central processing unit (Central Processing Unit, CPU) as an example. Wherein, at least one pull-up resistor includes R1 and R2; at least one digital-to-analog converter includes ADC1 and ADC2.

The detection module is connected to the first interface in the terminal device. Wherein, the first interface may be a Type-C interface, the first connection terminal includes a SBU1 (B8) pin, and the second connection terminal includes an SBU2 (A8) pin.

Based on the above charging control circuit, further, one end of R1 is connected to the SBU1 (B8) pin, and the other end of R1 is connected to the first power supply (VCC). A connection point 1 is provided on the connection line between R1 and the SBU1 (B8) pin, where ADC1 is connected to the connection point 1 for detecting the voltage signal of the connection point 1. Similarly, one end of R2 is connected to the SBU2 (A8) pin, and the other end of R2 is connected to the first power supply (VCC). A connection point 2 is provided on the connection line between R2 and the SBU2 (A8) pin, where ADC2 is connected to the connection point 2. ADC1 and ADC2 are respectively connected with CPU. In this example, the resistance values of R1 and R2 are equal.

The data line may specifically include: a second impedance element connected to the second interface of the data line, wherein the second impedance element includes pull-down resistors R3 and R4; the second interface of the data line includes a second connection terminal SBU1 ( B8) pin and SBU2 (A8) pin. The pull-down resistor R3 is connected to the SBU1 (B8) pin, and the pull-down resistor R4 is connected to the SBU2 (A8) pin. Here, the SBU1 pin and the SBU2 pin are selected because these two pins have no clear functional definition on the data line including the USB-A to USB-C dual-port adapter, so the embodiment of the present invention will be in the data At these two pins of the line, two pull-down resistors R3 and R4 are added to form a voltage divider circuit after the data line is connected to the terminal device.

Further, one end of R3 is connected to the SBU1 (B8) pin, and the other end is connected to an external power supply connected to the data line. Similarly, one end of R4 is connected to the SBU2 (A8) pin, and the other end is connected to the external power supply connected to the data line. In this example, the resistance values of R3 and R4 need to be configured in advance, and the specific configuration is shown in Table 1:

Table 1

Data line overcurrent capability R3 resistance value R4 resistance value I1 R11 R21 I2 R12 R22 I3 R13 R23 … … …

Wherein, R3=R4; I1<I2<I3; R11<R12<R13, here, the current limit of the data line is inversely proportional to the resistance value of the pull-down resistor configured on the data line.

When the data line is connected to an external power supply to charge the terminal device, the charging control circuit is electrically connected to the data line to form the following structure:

The SBU1 (B8) pin in the terminal equipment is connected to the SBU1 (B8) pin in the data line. Here, when the internal resistance of the two pins is small enough, the two pins can be used as connecting lines, and R1 and R3 connected in series. Thus, the power supply in the terminal equipment, the external power supply connected to R1 and the data line, and R3 form a voltage divider circuit 1 through the connection of two pins. Here, the detection point 1 is set at R1 and SBU1 (B8) in the terminal equipment. Between the pins (including the pins), ADC1 is connected to the detection point 1, detects the signal of the voltage divider circuit 1, and sends the signal 1 to the CPU.

Similarly, the SBU2 (A8) pin in the terminal equipment is connected to the SBU2 (A8) pin in the data line. Here, when the internal resistance of the two pins is small enough, the two pins can be used as a connecting line, and the R2 and R4 are connected in series. Thus, the power supply in the terminal equipment and the external power supply connected to R2 and the data line and R4 form a voltage divider circuit 2 through the connection of two pins. Here, the detection point 2 is set at R2 and SBU2 (A8) in the terminal equipment Between the pins (including the pins), ADC2 is connected to the detection point 2, detects the signal of the voltage divider circuit 2, and sends the signal 2 to the CPU.

Based on the above structure, the charging control principle provided by the embodiment of the present invention is as follows:

After the data lines with different current limits are connected to the terminal equipment, ADC1 and ADC2 are turned on to detect the voltage signals of detection points 1 and 2 respectively, and signals 1 and 2 are sent to the CPU. According to the received signals 1 and 2, the CPU selects one of the signals to calculate the maximum current value corresponding to the current limit of the data line. which level of current limit the data line. In order to avoid the data line and the terminal device from being incompatible during the charging process, resulting in the risk of burning the data line, the terminal device controls the current drawn by the power supply in the terminal device according to the current limit of the data line, so as to control the data during the charging process. The current on the line is controlled so that the current on the data line during charging is less than or equal to the current limit of the data line.

For example, combined with Table 1: When the CPU determines that ADC1 detects R11 or ADC2 detects R21, the CPU determines that the data line connected to the terminal device is the data line indicating the overcurrent capability I1. During the entire charging process, control The current flowing through the data line is not greater than I1.

Or, when the CPU determines that ADC1 detects R12 or ADC2 detects R22, the CPU determines that the data line connected to the terminal device is the data line indicating the overcurrent capability I2. During the entire charging process, it is necessary to control the data line to flow The current is not greater than I2.

Or, when the CPU determines that ADC1 detects R13 or ADC2 detects R23, the CPU determines that the data line connected to the terminal device is the data line indicating the overcurrent capability I3. During the entire charging process, it is necessary to control the data line to flow The current is not greater than I3.

In addition, it can be concluded that when the numbers of the pull-up resistor, the pull-down resistor, the connection terminals in the terminal device and the connection terminals in the data line are respectively multiple, the connection methods of the four can refer to the above-mentioned connection methods one by one corresponding connection.

In addition, FIG. 5 shows a circuit structure diagram of another embodiment of the present invention when a terminal device is connected to a data line.

As shown in FIG. 5 , the difference from the charge control circuit in FIG. 4 is that only one pull-down resistor R3 is included in the first impedance element, and R3 can be connected to the SBU1 (B8) pin or the SBU2 (A8) pin. In this way, different from the conclusion in FIG. 2, since there is only one pull-down resistor in the data line, only any one of the above two voltage dividing circuits can be implemented. Therefore, the ADC is only connected to one detection point and measures the signal of one voltage divider circuit. The ADC sends the signal to the CPU, and the CPU determines the current limit of the data line based on the signal. This structure can also achieve the purpose of reducing the design difficulty and production cost of the data line while ensuring that the data line charges the terminal equipment under safe conditions.

Fig. 6 shows a schematic flowchart of a charging control method according to an embodiment of the present invention. Applied to a terminal device including the charging control circuit in Figure 1, as shown in Figure 6, the method specifically includes: S610-S620, as shown below:

S610: When the data line is connected to the first interface point of the terminal device, obtain the current limit value of the data line connected to the first interface; wherein, the first interface includes a Type-C interface, and the Type-C interface includes an SBU1 pin and SBU2 pin.

S620: Control the current on the data line during charging according to the detection result of the detection module, so that the current does not exceed the current limit of the data line.

The charging control method of the embodiment of the present invention is based on setting a charging control circuit at the first interface connected to the data line, so that the charging control circuit and the impedance element in the data line form a voltage dividing circuit, and by obtaining the voltage signal of the voltage dividing circuit, Determine the current limit of the data line, so that the terminal device controls the current on the data line during charging, so that the current on the data line does not exceed the current limit of the data line. It can be realized that while the data line charges the terminal equipment under safe conditions, the design difficulty and production cost of the data line are reduced.

FIG. 7 is a schematic diagram of a hardware structure of a terminal device implementing an embodiment of the present invention.

As shown in Figure 7, the terminal device 700 includes, but is not limited to: a radio frequency module 706, a network module 702, an audio output module 703, an input module 704, a sensor 705, a display module 706, a user input module 707, an interface module 708, and a memory 709 , processor 710, and power supply 711 and other components. Those skilled in the art can understand that the terminal device structure shown in FIG. 7 does not constitute a limitation on the terminal device, and the terminal device may include more or less components than shown in the figure, or combine some components, or different components layout. In the embodiment of the present invention, the terminal devices include, but are not limited to, mobile phones, tablet computers, notebook computers, palmtop computers, vehicle-mounted terminal devices, wearable devices, and pedometers.

The terminal device in the embodiment of the present invention further includes a detection module (not shown in FIG. 7 ) and a control module (not shown in FIG. 7 ). Wherein, one input end of the detection module is connected to the physical interface (including the first interface), and the output end of the detection module is connected to the input end of the control module. Wherein, the interface unit 508 includes a physical interface.

The control module is used to control the current on the data line during charging according to the detection result of the detection module, so that the current does not exceed the current limit of the data line. Wherein, the detection module includes a processor 710 .

The terminal device sets the detection module and the control module at the first interface connected to the data line, so that the charging control circuit and the impedance element in the data line form a voltage divider circuit, and the terminal device determines the voltage of the data line by obtaining the voltage signal of the voltage divider circuit. The current limit of the data line, so that the terminal equipment can control the current on the data line during the charging process, so that the current on the data line does not exceed the current limit of the data line. It can be realized that while the data line charges the terminal equipment under safe conditions, the design difficulty and production cost of the data line are reduced.

It should be understood that, in the embodiment of the present invention, the radio frequency module 706 can be used for receiving and sending signals during sending and receiving information or during a call. Specifically, the downlink data from the base station is received and processed by the processor 760; Uplink data is sent to the base station. Generally, the radio frequency module 706 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. In addition, the radio frequency module 706 can also communicate with the network and other devices through a wireless communication system.

The terminal device provides users with wireless broadband Internet access through the network module 702, such as helping users send and receive emails, browse web pages, and access streaming media.

The audio output module 703 may convert audio data received by the radio frequency module 706 or the network module 702 or stored in the memory 709 into an audio signal and output as sound. Moreover, the audio output module 703 may also provide audio output related to a specific function performed by the terminal device 700 (for example, call signal receiving sound, message receiving sound, etc.). The audio output module 703 includes a speaker, a buzzer, a receiver and the like.

The input module 704 is used for receiving audio or video signals. The input module 704 may include a graphics processing unit (Graphics Processing Unit, GPU) 7041 and a microphone 7042, and the graphics processing unit 7041 is used for still pictures or video images obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The data is processed. The processed image frames can be displayed on the display module 706 . The image frames processed by the graphics processor 7041 may be stored in the memory 709 (or other storage media) or sent via the radio frequency module 706 or the network module 702 . The microphone 7042 can receive sound, and can process such sound into audio data. The processed audio data can be converted into an output format that can be sent to a mobile communication base station via the radio frequency module 706 in the case of a phone call mode.

The terminal device 700 also includes at least one sensor 705, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 7061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 7061 and the / or backlighting. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in various directions (generally three axes), and can detect the magnitude and direction of gravity when it is stationary, and can be used to identify the posture of terminal equipment (such as horizontal and vertical screen switching, related games) , magnetometer posture calibration), vibration recognition-related functions (such as pedometer, knocking), etc.; the sensor 705 can also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, Infrared sensors, etc., will not be repeated here.

The display module 706 is used to display information input by the user or information provided to the user. The display module 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an organic light-emitting diode (Organic Light-Emitting Diode, OLED), or the like.

The user input module 707 can be used to receive input numbers or character information, and generate key signal input related to user settings and function control of the terminal device. Specifically, the user input module 707 includes a touch panel 7071 and other input devices 7072 . The touch panel 7071, also referred to as a touch screen, can collect touch operations of the user on or near it (for example, the user uses any suitable object or accessory such as a finger or a stylus on the touch panel 7071 or near the touch panel 7071). operate). The touch panel 7071 may include two parts, a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, and 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 contact coordinates, and sends it to the For the processor 710, receive the command sent by the processor 710 and execute it. In addition, the touch panel 7071 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 7071 , the user input module 707 may also include other input devices 7072 . Specifically, other input devices 7072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be repeated here.

Furthermore, the touch panel 7071 can be covered on the display panel 7061. When the touch panel 7071 detects a touch operation on or near it, it will be sent to the processor 710 to determine the type of the touch event. The type of event provides a corresponding visual output on the display panel 7061. Although in FIG. 7, the touch panel 7071 and the display panel 7061 are used as two independent components to realize the input and output functions of the terminal device, in some embodiments, the touch panel 7071 and the display panel 7061 can be integrated The implementation of the input and output functions of the terminal device is not specifically limited here.

The interface module 708 is an interface for connecting an external device to the terminal device 700 . For example, an external device may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, audio input/output (I/O) ports, video I/O ports, headphone ports, and more. The interface module 708 can be used to receive input from an external device (for example, data information, power, etc.) transfer data between devices.

In addition, the interface module 708 can also be used to connect the detection module and the data line to form a voltage dividing circuit.

The memory 709 can be used to store software programs as well as various data. The memory 709 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application program required by a function (such as a sound playback function, an image playback function, etc.); Data created by the use of mobile phones (such as audio data, phonebook, etc.), etc. In addition, the memory 709 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

The processor 710 is the control center of the terminal equipment, and uses various interfaces and lines to connect various parts of the entire terminal equipment, by running or executing software programs and/or modules stored in the memory 709, and calling data stored in the memory 709 , execute various functions of the terminal equipment and process data, so as to monitor the terminal equipment as a whole. The processor 710 may include one or more processing modules; preferably, the processor 710 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface and application programs, etc., and the modem The processor mainly handles wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 710 .

The terminal device 700 may also include a power supply 711 (that is, a first power supply) for supplying power to various components. Preferably, the power supply 711 may be logically connected to the processor 710 through a power management system, so as to manage charging, discharging, and function through the power management system. Consumption management and other functions.

In addition, the terminal device 700 includes some functional modules not shown, which will not be repeated here.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article or apparatus comprising that element.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products are stored in a storage medium (such as ROM/RAM, disk, CD) contains several instructions to make a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods of various embodiments of the present invention.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than limiting, and those of ordinary skill in the art Under the enlightenment of the present invention, many forms can also be made without departing from the gist of the present invention and the protection scope of the claims, all of which belong to the protection of the present invention.

Claims (10)

1. A charging control circuit is applied to terminal equipment and is characterized in that,

the detection module is used for being connected with a first interface of the terminal equipment and acquiring a current limit value of a data line connected with the first interface; the first interface comprises a Type-C interface, and the Type-C interface comprises an SBU1 pin and an SBU2 pin;

and the control module is used for controlling the current on the data line in the charging process according to the detection result of the detection module so that the current does not exceed the current limit value of the data line.

2. The circuit of claim 1, wherein the detection module comprises:

a first impedance element connected to the first interface;

and the voltage sampling circuit is used for acquiring the voltage signal of the first interface.

3. The circuit of claim 2, wherein the first impedance element comprises a pull-down resistor, one end of the pull-down resistor is connected to the first interface, and the other end of the pull-down resistor is connected to a power supply of the terminal device.

4. The circuit of claim 2, wherein when the first interface is connected to the data line, the first interface is electrically connected to a pull-down resistor disposed in the data line.

5. The circuit of claim 4, wherein the first interface comprises a first connection terminal, wherein the first impedance element comprises a first pull-up resistor, and wherein the pull-down resistor comprises a first pull-down resistor;

one end of the first pull-up resistor is connected with the first connecting terminal, and the other end of the first pull-up resistor is connected with a power supply of the terminal equipment; when the first interface is connected with the data line, the first connecting terminal is electrically connected with a third connecting terminal, one end of the first pull-down resistor is connected with the third connecting terminal, and the other end of the first pull-down resistor is used for being connected with an external power supply;

the third connecting terminal is located at a second interface of the data line.

6. The circuit of claim 4, wherein the first interface further comprises a second connection terminal; the first impedance element further comprises a second pull-up resistor; the pull-down resistor further comprises a second pull-down resistor;

one end of the second pull-up resistor is connected with the second connecting terminal, and the other end of the second pull-up resistor is connected with a power supply of the terminal equipment; when the first interface is connected with the data line, the second connecting terminal is electrically connected with the fourth connecting terminal; one end of the second pull-down resistor is connected with the fourth connecting terminal, and the other end of the second pull-down resistor is used for being connected with an external power supply;

the fourth connecting terminal is located at the second interface of the data line.

7. The circuit of claim 6, wherein the voltage sampling circuit comprises: a first digital-to-analog converter and a second digital-to-analog converter; wherein,

the first digital-to-analog converter is respectively connected with the first connecting terminal and the control module;

the second digital-to-analog converter is respectively connected with the second connecting terminal and the control module.

8. A terminal device characterized by comprising a charge control circuit according to any one of claims 1 to 7.

9. A Type-C data line, comprising: the second impedance element is connected with the second interface of the data line and used for forming a voltage division circuit after the first interface in the data line is connected with the second interface of the terminal equipment; wherein,

an SBU1 pin in the first interface is connected with an SBU1 pin in the second interface;

the SBU2 pin in the second interface is connected with the SBU2 pin in the second interface.

10. The data line of claim 9, wherein the second impedance element comprises a pull-down resistor for connection with SBU1 pin and/or SBU2 pin in the first interface.