CN110190641B - Charging control circuit, terminal equipment and data line - Google Patents
Charging control circuit, terminal equipment and data line Download PDFInfo
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- CN110190641B CN110190641B CN201910356271.3A CN201910356271A CN110190641B CN 110190641 B CN110190641 B CN 110190641B CN 201910356271 A CN201910356271 A CN 201910356271A CN 110190641 B CN110190641 B CN 110190641B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/6608—Structural association with built-in electrical component with built-in single component
- H01R13/6616—Structural association with built-in electrical component with built-in single component with resistor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R31/00—Coupling parts supported only by co-operation with counterpart
- H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
- H01R31/065—Intermediate parts for linking two coupling parts, e.g. adapter with built-in electric apparatus
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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Abstract
The embodiment of the invention discloses a charging control circuit, terminal equipment and a data line. Wherein, this charge control circuit includes: 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. By utilizing the embodiment of the invention, the data lines with different current limit values can be ensured to charge the terminal equipment under the safe condition, and the design difficulty and the manufacturing cost of the data lines are reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of terminal equipment, in particular to a charging control circuit, terminal equipment and a data line.
Background
With the increase of the frequency of the terminal devices in life, the problem of charging the terminal devices becomes a concern. When the terminal equipment is charged, the terminal equipment can be charged in a mode of connecting a power supply through a data line by using a quick charging technology. In this case, the current flowing through the data line becomes large due to the increase in the charging speed, and the temperature rise in the data line becomes higher as the current becomes larger. If a terminal device supporting the fast charging technology is charged by being matched with a data line which does not support the fast charging technology, the risk of burning the data line can occur due to overlarge current flowing through the data line in the charging process.
At present, aiming at the risk, an identification chip is mainly arranged on the data line and used for representing the maximum bearable overcurrent capacity of the data line, so that the terminal equipment can identify the data line and control the current passing through the data line in the charging process. However, this scheme may increase the manufacturing cost of the data line.
Disclosure of Invention
The embodiment of the invention provides a charging control circuit, terminal equipment and a data line, which are used for solving the problem of higher manufacturing cost of the data line while ensuring that the data line is used for safely charging the terminal equipment.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a charging control circuit, which is applied to a terminal device, where the charging control circuit may include:
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.
In a second aspect, an embodiment of the present invention provides a terminal device, including the charge control circuit as described in the first aspect.
In a third aspect, an embodiment of the present invention provides a charging control method, which is applied to the terminal device according to the second aspect, and includes:
when the data line is electrically connected with a first interface of the terminal equipment, acquiring a current limit value of the 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;
controlling the current on the data line in the charging process according to the detection result of the detection module so as to enable the current not to exceed the current limit value of the data line
In a fourth aspect, an embodiment of the present invention provides a Type-C data line, including: 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 of the data line is connected with the second interface of the terminal equipment; wherein the content of the first and second substances,
the SBU1 pin in the first interface is connected with the SBU1 pin in the second interface;
the SBU2 pin in the second interface connects with the SBU2 pin in the second interface.
In the embodiment of the invention, the terminal equipment sets the charging control circuit at the first interface connected with the data line, so that the charging control circuit and the impedance element in the data line form a voltage division circuit, and the terminal equipment determines the current limit value of the data line by acquiring a voltage signal of the voltage division circuit, so that the terminal equipment can control the current on the data line in the charging process, and the current on the data line does not exceed the current limit value of the data line. The data line can be used for charging the terminal equipment under the safety condition, and meanwhile, the design difficulty and the manufacturing cost of the data line are reduced.
Drawings
The present invention will be better understood from the following description of specific embodiments thereof taken in conjunction with the accompanying drawings, in which like or similar reference characters designate like or similar features.
Fig. 1 shows a schematic structural diagram of a charge control circuit according to an embodiment of the present invention;
fig. 2 shows a circuit configuration diagram in a terminal device of an embodiment of the present invention;
FIG. 3 shows a circuit configuration diagram of a data line according to an embodiment of the present invention;
fig. 4 is a circuit configuration diagram showing a connection of a terminal device and a data line according to an embodiment of the present invention;
fig. 5 is a circuit configuration diagram showing a connection of a terminal device and a data line according to another embodiment of the present invention;
fig. 6 shows a flow chart diagram of a charge control method of an embodiment of the invention;
fig. 7 is a schematic diagram of a hardware structure of a terminal device for implementing an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the technical problem, embodiments of the present invention provide a charging control circuit, a terminal device, a method, and a data line.
First, a detailed description is given of a charge control circuit provided in an embodiment of the present invention with reference to fig. 1.
As shown in fig. 1, a charge control circuit 10 applied to a terminal device includes: a detection module 110 and a control module 120.
The detection module 110 is configured to be connected to a first interface of a terminal device, and obtain a current limit value of a data line connected to the first interface. The first interface may be a Type-C interface, and the Type-C interface further includes an SBU (side band use)1 pin and an SBU2 pin.
And the control module 120 is configured 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 value of the data line.
Therefore, in the charge control circuit 10 provided in the embodiment of the present invention, the charge control circuit is disposed at the first interface connected to the data line, so that the charge control circuit and the impedance element in the data line form a voltage dividing circuit, and the terminal device determines the current limit value of the data line by obtaining the current on the data line in the charging process, so that the terminal device controls the current on the data line in the charging process, and the current on the data line does not exceed the current limit value of the data line.
In addition, the first interface provided by the embodiment of the invention can comprise a charging terminal for charging and a connecting terminal for detecting the current limit value of the data line. Wherein the charging terminal for charging may include a VBus pin; the connection terminals for detecting the current limit of the data line include the SBU1 pin and the SBU2 pin referred to above.
The charge control circuit and the data lines are further described below with reference to fig. 2 and 3, respectively.
As shown in fig. 2, the detection module 110 according to 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 with the first interface 130; the voltage sampling circuit 220 is used for collecting a voltage signal of the first interface 130 in the terminal device.
Further, the first impedance element 210 according to 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 the case where 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 with the first connection terminal, the other end of the first pull-up resistor is connected with the power supply, when the first interface 130 is connected with the data line, the first connection terminal is electrically connected with the third connection terminal, one end of the first pull-down resistor is connected with the third connection terminal, the other end of the first pull-down resistor is used for being connected with the external power supply, and 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 further includes a second connection terminal, and the first impedance element further includes a second pull-up resistor; the pull-down resistor further comprises a second pull-down resistor; one end of the second upper resistor is connected with the second connecting terminal, the other end of the second pull-up resistor is connected with a power supply of the terminal equipment, and when the first interface 130 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.
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; 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.
And the control module 120 is configured to calculate a current limit value of the data line according to a detection result of the detection module, and then control a current on the data line in a charging process.
As shown in fig. 3, in an embodiment of the present invention, there is provided a data line including: and a second impedance element 310, wherein the second impedance element 310 is connected to the second interface 320 of the data line, and is used for forming a voltage division circuit after the first interface of the data line is connected to the second interface 320 of the terminal device, so as to detect the current limit value of the data line. The SBU1 pin in the first interface is connected with the SBU1 pin in the second interface; the SBU2 pin in the first interface connects with the SBU2 pin in the second interface. The data lines in the embodiment of the invention can be Type-C data lines. The second interface may 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 with the SBU1 pin and/or the SBU2 pin in the first interface, and the other end is connected with an external power supply, and the external power supply may include: the power supply provided by the socket.
Here, when the pull-down resistor is provided in the data line, the resistance value of the pull-down resistor needs to be previously configured. Specifically, when the data line is produced, the resistance value of the pull-down resistor is configured according to different current limit values of the data line, and the configuration relationship is mainly that the resistance value of the pull-down resistor is in inverse proportion to the current limit value of the data line.
Specifically, when the data line is connected to the terminal device and supplies power to the terminal device, and the charging terminal and the connection terminal at the connection point are short-circuited, the voltage of the connection terminal is pulled high by the charging terminal, where the terminal device erroneously recognizes a data line with a large current as a data line with a small current is better than erroneously recognizes a data line with a small current as a data line with a large current. For example, when the charging terminal Vbus pin and the connection terminal SBU pin in the USB port are short-circuited by a foreign object or a liquid, the voltage of the SBU pin is pulled high by the Vbus pin, and the terminal device determines, according to the voltage of the SBU pin, 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 value of the connection line is a small current value, and the terminal device controls the current on the data line using the small current value as a standard during charging, because the small current value does not exceed the maximum current value corresponding to the current limit value of the data line, the data line is not burned.
In another example, the pull-down resistors in the data lines may be replaced by ground resistors, and the connection manner of the pull-down resistors in the circuit is the same as the connection manner of the ground resistors after replacement in the circuit.
Therefore, the terminal equipment sets the charging control circuit at the first interface connected with the data line, so that the charging control circuit and the impedance element in the data line form a voltage division circuit, and the terminal equipment determines the current limit value of the data line by acquiring a voltage signal of the voltage division circuit, so that the terminal equipment controls the current on the data line in the charging process, and the current on the data line does not exceed the current limit value of the data line. The data line can be used for charging the terminal equipment under the safety condition, and meanwhile, the design difficulty and the manufacturing cost of the data line are reduced.
The following describes in detail a case where the terminal device is connected to the data line, with specific reference to fig. 4 and 5.
Fig. 4 is a circuit configuration diagram showing a configuration in which a terminal device and a data line are connected according to an embodiment of the present invention.
As shown in fig. 4, the charge control circuit in the terminal device includes: the device comprises a detection module and a control module.
Wherein, the detection module includes: at least one pull-up resistor and at least one Digital-to-Digital Converter (ADC); the control module includes at least one processor, and the embodiment of the present invention is described by taking a Central Processing Unit (CPU) as an example. Wherein the at least one pull-up resistor comprises R1 and R2; the at least one digital-to-analog converter includes ADC1 and ADC 2.
The detection module is connected with a first interface in the terminal equipment. The first interface can be a Type-C interface, the first connection terminal comprises an SBU1(B8) pin, and the second connection terminal comprises an SBU2(A8) pin.
Based on the above charge control circuit, one end of R1 is connected to SBU1(B8) pin, and the other end of R1 is connected to first power supply (VCC). A connection point 1 is provided on a connection line between the R1 and the SBU1(B8) pin, and here, the ADC1 is connected to the connection point 1 for detecting a voltage signal of the connection point 1. Similarly, one end of R2 is connected to SBU2(a8) pin, and the other end of R2 is connected to first power supply (VCC). A connection point 2 is provided on the connection line between the R2 and SBU2(a8) pin, where the ADC2 is connected to the connection point 2. The ADC1 and the ADC2 are connected to the CPU, respectively. 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 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 embodiments of the present invention will add two pull-down resistors R3 and R4 at these two pins of the data line for forming a voltage divider circuit after the data line is connected to the terminal device.
Further, one end of the R3 is connected to the SBU1(B8) pin, and the other end is connected to an external power source connected to the data line. Similarly, one end of the R4 is connected with the SBU2(A8) pin, and the other end is connected with an external power supply connected with 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 over-current 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, where the data line current limit is inversely related to the resistance of the pull-down resistor disposed on the data line.
When the data line is connected with an external power supply to charge the terminal equipment, the charging control circuit is electrically connected with the data line to form the following structure:
the SBU1(B8) pin in the terminal device is connected to the SBU1(B8) pin in the data line, where when the internal resistance of the two pins is sufficiently small, the two pins can be used as a connection line, and R1 and R3 can be connected in series. Thus, the power supply in the terminal device and the external power supply and R3 to which R1 is connected to the data line form a voltage dividing circuit 1 by connection of two pins, where a detection point 1 is provided between R1 and the SBU1(B8) pin in the terminal device (including the pin), the ADC1 connects the detection point 1, detects the signal of the voltage dividing circuit 1, and sends the signal 1 to the CPU.
Similarly, the SBU2(a8) pin in the terminal device is connected to the SBU2(a8) pin in the data line, and here, when the internal resistance of the two pins is sufficiently small, the two pins can be used as a connection line, and R2 and R4 can be connected in series. Thus, the power supply in the terminal device and the external power supply to which R2 is connected to the data line and R4 form the voltage dividing circuit 2 by connection of two pins, where the detection point 2 is provided between R2 and the SBU2(a8) pin in the terminal device (including the pin), the ADC2 connects the detection point 2, detects the signal of the voltage dividing circuit 2, and sends the signal 2 to the CPU.
Based on the above structure, the charge 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 device, the ADCs 1 and 2 are turned on to detect the voltage signals at detection points 1 and 2, respectively, and transmit the signals 1 and 2 to the CPU. The CPU selects one of the signals to calculate the maximum current value corresponding to the current limit value of the data line according to the received signals 1 and 2, namely, when any ADC collects the signal, the CPU can judge which level of the data line is connected with the terminal equipment and has the current limit value. In order to avoid the risk of burning out the data line due to the fact that the data line and the terminal device are not matched in the charging process, the terminal device controls the size of current extracted by a power supply in the terminal device according to the current limit value of the data line, and therefore the current on the data line in the charging process is controlled, and the current on the data line in the charging process is smaller than or equal to the current limit value of the data line.
For example, in conjunction with table 1: when the CPU determines that the ADC1 detects R11 or the ADC2 detects R21, the CPU determines that the data line connected with the terminal equipment is the data line representing the overcurrent capacity I1, and the current flowing on the data line is controlled not to be larger than I1 in the whole charging process.
Or, when the CPU determines that the ADC1 detects R12 or the ADC2 detects R22, the CPU determines that the data line to which the terminal device is connected is a data line indicating the overcurrent capability I2, and controls the current flowing through the data line to be not greater than I2 during the entire charging process.
Or, when the CPU determines that the ADC1 detects R13 or the ADC2 detects R23, the CPU determines that the data line to which the terminal device is connected is a data line indicating the overcurrent capability I3, and controls the current flowing through the data line to be not greater than I3 during the entire charging process.
In addition, it can be seen that, when the number of the pull-up resistor, the pull-down resistor, the connection terminal in the terminal device, and the connection terminal in the data line is plural, the connection modes of 4 terminals may be connected in a one-to-one correspondence manner with reference to the connection modes described above.
In addition, fig. 5 shows a circuit configuration diagram when the terminal device and the data line are connected according to another embodiment of the present invention.
As shown in fig. 5, unlike the charge control circuit in fig. 4, the first impedance element includes only one pull-down resistor R3, and R3 may be connected to the SBU1(B8) pin or the SBU2(a8) pin. Thus, unlike the discussion in fig. 2, only one of the two voltage divider circuits can be implemented because there is only one pull-down resistor in the data line. Therefore, the ADC is only connected to one detection point, and the signal of one voltage division circuit is measured. The ADC sends a signal to the CPU, which determines the current limit of the data line based on the signal. The structure can also achieve the purposes of reducing the design difficulty and the manufacturing cost of the data line while ensuring that the data line charges the terminal equipment under the safe condition.
Fig. 6 is a flowchart illustrating a charging control method according to an embodiment of the present invention. As shown in fig. 6, the method is applied to a terminal device including the charge control circuit in fig. 1, and specifically includes: S610-S620, as follows:
s610: when the data line is connected with a first interface point of the terminal equipment, acquiring a current limit value of the data line connected with the first interface; wherein, first interface includes Type-C interface, and Type-C interface includes SBU1 pin and SBU2 pin.
S620: and 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.
According to the charging control method, the charging control circuit is arranged at the first interface connected with the data line, the charging control circuit and the impedance element in the data line form a voltage division circuit, the voltage signal of the voltage division circuit is obtained, and the current limit value of the data line is determined, so that the terminal equipment can control the current on the data line in the charging process, and the current on the data line does not exceed the current limit value of the data line. The data line can be used for charging the terminal equipment under the safety condition, and meanwhile, the design difficulty and the manufacturing cost of the data line are reduced.
Fig. 7 is a schematic diagram of a hardware structure of a terminal device for implementing an embodiment of the present invention.
As shown in fig. 7, the terminal device 700 includes but is not limited to: radio frequency module 706, network module 702, audio output module 703, input module 704, sensor 705, display module 706, user input module 707, interface module 708, memory 709, processor 710, and power supply 711. Those skilled in the art will appreciate that the terminal device configuration shown in fig. 7 does not constitute a limitation of the terminal device, and that the terminal device may include more or fewer components than shown, or combine certain components, or a different arrangement of components. In the embodiment of the present invention, the terminal device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal device, a wearable device, a pedometer, and the like.
The terminal device of 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). One input end of the detection module is connected with the physical interface (including the first interface), and the output end of the detection module is connected with the input end of the control module. Among other things, the interface unit 508 includes a physical interface.
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. Wherein the detection module comprises a processor 710.
The terminal equipment enables the charging control circuit and the impedance element in the data line to form a voltage division circuit by arranging the detection module and the control module at the first interface connected with the data line, and determines the current limit value of the data line by acquiring a voltage signal of the voltage division circuit so that the terminal equipment can control the current on the data line in the charging process and the current on the data line does not exceed the current limit value of the data line. The data line can be used for charging the terminal equipment under the safety condition, and meanwhile, the design difficulty and the manufacturing cost of the data line are reduced.
It should be understood that, in the embodiment of the present invention, the radio frequency module 706 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 760; in addition, the uplink data is transmitted to the base station. In general, 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 may also communicate with networks and other devices via a wireless communication system.
The terminal device provides the user with wireless broadband internet access through the network module 702, such as helping the user send and receive e-mails, browse webpages, access streaming media, and the like.
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. Also, the audio output module 703 may also provide audio output related to a specific function performed by the terminal device 700 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output module 703 includes a speaker, a buzzer, a receiver, and the like.
The input module 704 is used to receive audio or video signals. The input module 704 may include a Graphics Processing Unit (GPU) 7041 and a microphone 7042, and the Graphics processor 7041 processes image data of still pictures or videos obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may 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 medium) or transmitted via the radio frequency module 706 or the network module 702. The microphone 7042 may receive sounds and may be capable of processing such sounds into audio data. The processed audio data may be converted to a format output that may be transmitted to a mobile communication base station via the radio frequency module 706 in case of a phone call mode.
The terminal device 700 further comprises at least one sensor 705, such as light sensors, motion sensors and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the luminance of the display panel 7061 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 7061 and/or a backlight when the terminal device 700 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), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal device posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 705 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.
The display module 706 is used to display information entered by the user or 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 (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input module 707 may be used to receive input numeric or character information and generate key signal inputs 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, may collect touch operations by a user on or near the touch panel 7071 (e.g., operations by a user on or near the touch panel 7071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 7071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by 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 710, receives a command from the processor 710, and executes the command. In addition, the touch panel 7071 can be implemented by various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to touch panel 7071, user input module 707 can include other input devices 7072. In particular, the other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein again.
Further, the touch panel 7071 may be overlaid on the display panel 7061, and when the touch panel 7071 detects a touch operation on or near the touch panel 7071, the touch operation is transmitted to the processor 710 to determine the type of the touch event, and then the processor 710 provides a corresponding visual output on the display panel 7061 according to the type of the touch event. Although in fig. 7, the touch panel 7071 and the display panel 7061 are implemented as two independent components to implement the input and output functions of the terminal device, in some embodiments, the touch panel 7071 and the display panel 7061 may be integrated to implement the input and output functions of the terminal device, which is not limited herein.
The interface module 708 is an interface for connecting an external device to the terminal apparatus 700. 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 module 708 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal apparatus 700 or may be used to transmit data between the terminal apparatus 700 and the external device.
In addition, the interface module 708 may be used to connect the detection module and the data line to form a voltage divider circuit.
The memory 709 may be used to store software programs as well as various data. The memory 709 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), 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. Further, the memory 709 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 710 is a control center of the terminal device, connects various parts of the entire terminal device by using various interfaces and lines, and performs various functions of the terminal device and processes data by running or executing software programs and/or modules stored in the memory 709 and calling data stored in the memory 709, thereby performing overall monitoring of the terminal device. Processor 710 may include one or more processing modules; preferably, the processor 710 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 710.
The terminal device 700 may further include a power supply 711 (i.e., a first power supply) for supplying power to each component, and preferably, the power supply 711 may be logically connected to the processor 710 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.
In addition, the terminal device 700 includes some functional modules that are not shown, and are not described in detail herein.
It should be noted that, 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. To the extent that no more limitation is intended, an element defined by the phrase "comprising an … …" does not exclude the presence of other similar elements in a process, method, article, or apparatus that comprises the element.
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 invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
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; the SBU1 pin and the SBU2 pin are used for connecting a first impedance element in the detection module with a second impedance element in the data line, so that the charging control circuit and the second impedance element form a voltage division circuit;
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; wherein the current limit value of the data line is in inverse proportion to the pull-down resistance value of the second impedance element in 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 content of the first and second substances,
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.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910356271.3A CN110190641B (en) | 2019-04-29 | 2019-04-29 | Charging control circuit, terminal equipment and data line |
| PCT/CN2020/085650 WO2020221043A1 (en) | 2019-04-29 | 2020-04-20 | Charge control circuit, terminal device and data line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910356271.3A CN110190641B (en) | 2019-04-29 | 2019-04-29 | Charging control circuit, terminal equipment and data line |
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| Publication Number | Publication Date |
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| CN110190641A CN110190641A (en) | 2019-08-30 |
| CN110190641B true CN110190641B (en) | 2022-04-05 |
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| CN110190641B (en) * | 2019-04-29 | 2022-04-05 | 维沃移动通信有限公司 | Charging control circuit, terminal equipment and data line |
| CN111509814B (en) * | 2020-05-29 | 2021-10-12 | 维沃移动通信有限公司 | Data line and charging equipment |
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| KR101494900B1 (en) * | 2007-07-25 | 2015-02-24 | 삼성전자주식회사 | Mobile phone and method for charging through discernment charging cable |
| CN104253458B (en) * | 2013-06-28 | 2018-06-15 | 富泰华工业（深圳）有限公司 | Performance Test System, test method and the electronic device of USB charge cables |
| US9952996B2 (en) * | 2014-10-15 | 2018-04-24 | Icron Technologies Corporation | Devices and methods for providing concurrent superspeed communication and four-lane displayport communication via a USB type-C receptacle |
| CN104469347B (en) * | 2014-12-08 | 2016-08-24 | 硅谷数模半导体（北京）有限公司 | The testing circuit of video transmission cable and video frequency output chip |
| EP3171480B1 (en) * | 2015-04-29 | 2020-07-29 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method for identifying types of cables, power adaptor and cable |
| CN106129501B (en) * | 2016-06-29 | 2019-05-03 | 珠海市魅族科技有限公司 | A kind of method and device of terminal charge |
| CN106445044A (en) * | 2016-08-18 | 2017-02-22 | 硅谷数模半导体（北京）有限公司 | Data conversion interface protection method and system |
| JP6730888B2 (en) * | 2016-09-05 | 2020-07-29 | キヤノン株式会社 | Electronic device and control method thereof |
| CN206353652U (en) * | 2016-11-02 | 2017-07-25 | 上海传英信息技术有限公司 | USB transmission line, mobile terminal |
| CN207517932U (en) * | 2017-08-01 | 2018-06-19 | 珠海市魅族科技有限公司 | USB cable, USB interface and adapter |
| CN110190641B (en) * | 2019-04-29 | 2022-04-05 | 维沃移动通信有限公司 | Charging control circuit, terminal equipment and data line |
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| WO2020221043A1 (en) | 2020-11-05 |
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