CN112910041B - Charging circuit of terminal equipment, terminal equipment and terminal system - Google Patents
Charging circuit of terminal equipment, terminal equipment and terminal system Download PDFInfo
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- CN112910041B CN112910041B CN202110123318.9A CN202110123318A CN112910041B CN 112910041 B CN112910041 B CN 112910041B CN 202110123318 A CN202110123318 A CN 202110123318A CN 112910041 B CN112910041 B CN 112910041B
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- 239000002184 metal Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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Abstract
The application discloses a charging circuit of terminal equipment, the terminal equipment and a terminal system, and belongs to the field of electronic circuits. Wherein the charging circuit of the terminal device includes: the device comprises a first switch, a processing unit, a temperature detection unit and a charging interface, wherein the charging interface comprises a power input pin and a first signal pin, and the device comprises: the first switch is connected between the first signal pin and the grounding end, and the control end of the first switch is connected with the first output end of the processing unit; the first input end of the processing unit is connected with the output end of the temperature detection unit; under the condition that the first signal pin is communicated and the temperature detection unit detects that the temperature of the charging interface is greater than the preset temperature, the processing unit can disconnect the connection between the first signal pin and the grounding end by controlling the first switch, so that the power input pin is powered off. The circuit can solve the problem that a charging interface in a charging circuit of terminal equipment is burnt.
Description
Technical Field
The application belongs to the field of electronic circuits, and particularly relates to a charging circuit of terminal equipment, terminal equipment and a terminal system.
Background
Currently, when a user determines that charging of a mobile phone with a charger is completed, the user usually only pulls the mobile phone out of the charger. At this point, the charger is still plugged into the live power outlet.
When the charger is plugged into the electrified power socket, the interface of the data line connected with the mobile phone charging interface in the charger is always electrified. If liquid or impurities enter the charged interface, this will cause corrosion of the metal pins of the charged interface, which in turn will cause an increase in the impedance of the charged interface. When the charger is used for charging the mobile phone in the follow-up process, the charging interface of the mobile phone can increase the impedance of the interface connected with the mobile phone by the data wire, and/or the interface connected with the mobile phone by the data wire is in short circuit due to corrosion of metal pins, so that self-leakage heating is generated, and the temperature rise is too high, so that the mobile phone is burnt.
Content of the application
The embodiment of the application aims to provide a charging circuit of terminal equipment, which can solve the problem that a charging interface in the charging circuit of the terminal equipment is burnt.
In order to solve the technical problems, the application is realized as follows:
In a first aspect, an embodiment of the present application provides a charging circuit of a terminal device, where the circuit includes a first switch, a processing unit, a temperature detecting unit, and a charging interface, where the charging interface includes a power input pin and a first signal pin, where:
The first switch is connected between the first signal pin and the grounding end, and the control end of the first switch is connected with the first output end of the processing unit;
the first input end of the processing unit is connected with the output end of the temperature detection unit;
and under the condition that the first signal pin is communicated and the temperature detection unit detects that the temperature of the charging interface is greater than the preset temperature, the processing unit can power off the power input pin by controlling the first switch to disconnect the connection between the first signal pin and the grounding end.
In a second aspect, an embodiment of the present application provides a terminal device comprising a charging circuit of a terminal device as described in the first aspect.
In a third aspect, an embodiment of the present application provides a terminal system, where the terminal system includes the terminal device according to the second aspect and a data line, where the data line includes: input power pin, output power pin, input ground connection pin, third resistance, fourth resistance, voltage control switch, with the third signal pin of first signal pin matching, wherein:
The voltage control switch is connected between the input end power supply pin and the output end power supply pin, and the control end of the voltage control switch is connected with the third signal pin;
the third resistor is connected between the input end power pin and the third signal pin;
the fourth resistor is connected between the third signal pin and the output end grounding pin;
the input end grounding pin is connected with the output end grounding pin;
in the event that a first switch in the terminal device is open, the voltage control switch is open.
In an embodiment of the present application, a charging circuit of a terminal device is provided, where the charging circuit includes a first switch, a processing unit, a temperature detecting unit, and a charging interface, the charging interface includes a power input pin and a first signal pin, where: the first switch is connected between the first signal pin and the grounding end, and the control end of the first switch is connected with the first output end of the processing unit; the first input end of the processing unit is connected with the output end of the temperature detection unit. Under the condition that the first signal pins are communicated and the temperature detection unit detects that the temperature of the charging interface is larger than the preset temperature, the fact that the temperature of the charging interface is too high is determined, and the charging interface is burnt out is judged. At this time, the processing unit may power off the power input pin by controlling the first switch to disconnect the connection between the first signal pin and the ground terminal. Therefore, the data line is disconnected to supply power to the charging interface, so that the temperature of the charging interface is reduced, and the charging interface is prevented from being burnt. Therefore, the charging circuit of the terminal equipment provided by the embodiment of the application can avoid the problems that the charging interface generates self-leakage heat due to the increase of the impedance of the interface of the charging interface connected with the data line and/or the short circuit of the interface of the charging interface connected with the data line caused by the corrosion of the metal pin, so that the charging interface is burnt.
Drawings
Fig. 1 is a schematic structural diagram of a data line according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a charging circuit of a terminal device according to an embodiment of the present application;
fig. 3 is a schematic diagram of a charging circuit of a terminal device according to a second embodiment of the present application;
fig. 4 is a schematic diagram III of a charging circuit of a terminal device according to an embodiment of the present application;
Fig. 5 is a schematic structural diagram of a charging circuit of a terminal device according to an embodiment of the present application;
Fig. 6 is a schematic diagram of a charging circuit of a terminal device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application may be practiced otherwise than as specifically illustrated or described herein. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The charging circuit of the terminal device, the terminal device and the terminal system provided by the embodiment of the application are described in detail below through specific embodiments and application scenes thereof with reference to the accompanying drawings.
The embodiment of the application provides a data line. As shown in fig. 1, the data line includes an input power pin 101, an output power pin 102, an input ground pin 103, an output ground pin 104, a third resistor 105, a fourth resistor 106, a voltage control switch 107, and a third signal pin 108 that is matched to the first signal pin. Wherein:
The voltage control switch 107 is connected between the input end power pin 101 and the output end power pin 102, and the control end of the voltage control switch 107 is connected with the third signal pin 108; the third resistor 105 is connected between the input power pin 101 and the third signal pin 108; the fourth resistor 106 is connected between the third signal pin 108 and the output ground pin 104; the input terminal ground pin 103 is connected to the output terminal ground pin 104.
In case the third signal pin 108 is on and the first switch 201 in the terminal device is off, the voltage controlled switch 107 is off.
In the embodiment of the application, the input end power pin 101 and the input end ground pin 103 are respectively used for being connected with pins corresponding to the interfaces on the charging heads in the chargers. The output power pin 102 is used to connect with a power input pin 204 in the charging interface of the terminal device. The output ground pin 104 is used to connect with a ground pin 205 in the charging interface of the terminal device. The third signal pin 108 is for connection with a first signal pin 206 in the charging interface of the terminal device.
The third signal pin 108 may be a signal pin newly introduced into an interface connected to the charging interface of the terminal device in the existing data line, or may be any signal pin, such as a SUB pin, a CC pin, or the like, in an interface connected to the charging interface of the terminal device in the existing data line.
In the embodiment of the present application, a voltage control switch 107 is provided between the input terminal power supply pin 101 and the output terminal power supply pin 102. And the voltage of the control terminal of the voltage control switch 107 can be controlled to control the voltage control switch 107 to be in an on state or an off state. In the case where the voltage control switch 107 is in the off state, the path between the input terminal power supply pin 101 and the output terminal power supply pin 102 is disconnected, so that even if the data line is inserted into the charging interface of the terminal device, the data line cannot supply power to the charging interface of the terminal device, i.e., the terminal device cannot realize charging.
Correspondingly, in the case that the voltage control switch 107 is in a conductive state, the path between the input terminal power pin 101 and the output terminal power pin 102 is conductive, so that, in the case that the data line is inserted into the charging interface of the terminal device, the data line can supply power to the charging interface of the terminal device, that is, the terminal device can realize charging.
In the embodiment of the application, the third resistor 105 and the sixth resistor 106 are arranged to provide a basis for controlling the on-off of the voltage control switch 107.
In one embodiment of the present application, as shown in fig. 1, when the input power pin 101 is charged, that is, when the charger is plugged into a charged power socket, the voltage at the end connected to the input power pin 101 of the voltage control switch 107 is R1/(r1+rp) ×vbus, where R1 is the resistance of the third resistor 105, rp is the resistance of the fourth resistor 106, and Vbus is the voltage on the input power pin 101.
When the third signal pin 108 is in the floating state, the voltage at the control terminal of the voltage control switch 107 is R1/(r1+rp1) ×vbus, and at this time, the voltage control switch 107 is in the off state. Or when the third signal pin 108 is connected to a voltage greater than R1/(r1+rp1) ×vbus, the voltage control switch 107 is in an off state. When the third signal pin 108 is pulled down to the ground, the control terminal voltage of the voltage control switch 107 will be pulled down, and at this time, the voltage control switch 107 is in a conductive state.
In the embodiment of the present application, in the case that the third signal pin 108 is connected, the data line is illustrated as being inserted into the charging interface of the terminal device. In this case, the on-off state of the first switch 102 in the terminal device may be correlated with the on-off state of the voltage control switch 107 to realize that the first switch 102 is controlled to be turned off in case that the temperature of the charging interface of the terminal device is greater than a preset temperature, and that the voltage control switch 107 is turned off in case that the first switch 102 is turned off.
In one embodiment of the present application, as shown in fig. 1, the voltage control switch 107 is a PMOS transistor, the source of the PMOS transistor is connected to the input power pin 101, the drain of the PMOS transistor is connected to the output power pin, and the control end of the PMOS transistor is connected to the third signal pin.
In one embodiment of the present application, the data line may be an A-C data line.
In the embodiment of the application, a data line is provided, when a charger is plugged in a charged power plug board, the charging interface of the terminal equipment can be powered through the charging line, and the charging interface of the terminal equipment can be powered off under the control of the terminal equipment.
In an embodiment of the present application, as shown in fig. 2, a charging circuit of a terminal device is provided, where the charging circuit includes a first switch 201, a processing unit 202, a temperature detecting unit 203, and a charging interface, and the charging interface includes a power input pin 204 and a first signal pin 206. Wherein:
The first switch 201 is connected between the first signal pin 206 and the ground, and the control end of the first switch 201 is connected with the first output end of the processing unit 202; a first input of the processing unit 202 is connected to an output of the temperature detection unit 203.
In the case that the first signal pin 206 is connected, and the temperature detecting unit 203 detects that the temperature of the charging interface is greater than the preset temperature, the processing unit 202 may disconnect the power input pin 204 by controlling the first switch 201 to disconnect the connection between the first signal pin 206 and the ground terminal.
It will be appreciated that the charging interface also includes a ground pin 205, the ground pin 205 being connected to ground.
In the embodiment of the present application, the power input pin 204 in the charging interface is used for connecting with the output power pin 102 in the data line, the ground pin 205 in the charging interface is used for connecting with the output ground pin in the data line, and the first signal pin 206 in the charging interface is used for connecting with the third signal pin 108 in the data line. The temperature detecting unit 203 may be a thermistor, and may be any other component for detecting temperature.
Note that, the first signal pin 206 may be a signal pin newly introduced into an existing charging interface, or may be a signal pin multiplexing an existing charging interface, for example, a SUB pin or a CC pin.
In the embodiment of the present application, in the case that the first signal pin 206 is connected, the power input pin 204 is connected to the output power pin 102 in the data line, and the ground pin 205 is connected to the output ground pin 104 in the data line. At this time, the data line shown in fig. 1 is inserted into the charging interface of the terminal device to charge the battery in the terminal device by the power input pin 204.
In this embodiment of the present application, the temperature detecting unit 203 is disposed at the charging interface, and is configured to detect temperature information of the charging interface, and report the temperature information to the processing unit 202. In the case that the temperature of the charging interface is determined to be greater than the preset temperature according to the temperature information, the processing unit 202 determines that the temperature of the charging interface is too high, and the charging interface is at risk of being burnt. At this time, the processing unit 202 controls the first switch 201 to be turned off.
In combination with the structure of the data line shown in fig. 1, when the processing unit 202 controls the first switch 201 to be turned off, the voltage at the end of the voltage control switch 107 connected to the input power pin 101 is the same as the voltage at the control end of the voltage control switch 107. At this time, the voltage control switch 107 is in an off state. Thus, although the data line is inserted into the charging interface of the terminal device, the circuit between the output power pin 102 in the data line and the power input pin 204 in the charging interface is disconnected, i.e. the power input pin 204 is powered off, and at this time, the data line cannot supply power to the charging interface. Further, the temperature of the charging interface is reduced, so that the charging interface is prevented from being burnt.
Correspondingly, the processing unit 202 determines that the temperature of the charging interface is normal when determining that the temperature of the charging interface is less than or equal to the preset temperature according to the temperature information, and the charging interface is not in risk of being burnt. At this time, the processing unit 202 controls the first switch 201 to be turned on.
In conjunction with the interface of the data line shown in fig. 1, when the processing unit 202 controls the first switch 201 to be turned on, the voltage at the control terminal of the voltage control switch 107 is pulled down by the voltage, and at this time, the voltage control switch 107 is in a turned-on state. In this way, in the case that the data line is inserted into the charging interface of the terminal device, the circuit between the output power pin 102 in the data line and the power input pin 204 in the charging interface is turned on, and thus the data line can supply power to the charging interface, i.e., the terminal device can realize charging.
In an embodiment of the present application, a charging circuit of a terminal device is provided, where the charging circuit includes a first switch, a processing unit, a temperature detecting unit, and a charging interface, the charging interface includes a power input pin and a first signal pin, where: the first switch is connected between the first signal pin and the grounding end, and the control end of the first switch is connected with the first output end of the processing unit; the first input end of the processing unit is connected with the output end of the temperature detection unit. Under the condition that the first signal pins are communicated and the temperature detection unit detects that the temperature of the charging interface is larger than the preset temperature, the fact that the temperature of the charging interface is too high is determined, and the charging interface is burnt out is judged. At this time, the processing unit may power off the power input pin by controlling the first switch to disconnect the connection between the first signal pin and the ground terminal. Therefore, the data line is disconnected to supply power to the charging interface, so that the temperature of the charging interface is reduced, and the charging interface is prevented from being burnt. Therefore, the charging circuit of the terminal equipment provided by the embodiment of the application can avoid the problems that the charging interface generates self-leakage heat due to the increase of the impedance of the charging interface connected with the data line and/or the short circuit of the interface connected with the charging interface caused by the corrosion of the metal pin, so that the charging interface is burnt.
In an embodiment of the present application, as shown in fig. 3, a charging circuit of a terminal device according to an embodiment of the present application further includes a first resistor 207. The first switch 201 is connected to the ground terminal through a first resistor 207.
In the embodiment of the present application, the first resistor 207 acts as a pull-down resistor to pull down the voltage of the control terminal of the voltage control switch 107 stably in the case that the first signal pin 206 is connected.
In one embodiment of the present application, the resistance of the first resistor 207 may be set to 5.1kΩ.
In one embodiment of the application, the charging interface may be a Type-C interface. The first signal pin 206 may be a CC pin. When the first signal pin 206 is a CC pin, the third signal pin is a CC pin in the data line.
It should be noted that, when the charging interface is a Type-C interface, the CC pin in the charging interface is grounded through the switch and the resistor. On this basis, when the first signal pin 206 is a CC pin, the first switch 201 and the first resistor 207 in the charging circuit of the terminal device provided in the embodiment of the present application may multiplex the switch and the resistor connected to the CC pin in the charging interface. Therefore, when the first signal pin is a CC pin, the number of components can be reduced, so that the integration difficulty of the charging circuit of the terminal equipment is reduced.
It should be noted that, since two CC pins are provided in the Type-C interface, the CC1 pin and the CC2 pin are respectively provided. And when the data line is being inserted in the Type-C interface, the third signal pin is connected with the CC1 pin. And when the data line is reversely inserted in the Type-C interface, the third signal pin is connected with the CC2 pin.
On the basis of the above, as shown in fig. 4, in the charging circuit of the terminal device provided in the embodiment of the present application, the charging interface further includes a second signal pin 208, and the charging circuit of the terminal device further includes a second switch 209. Wherein:
the second switch 209 is connected between the second signal pin 208 and the ground, and a control terminal of the second switch 209 is connected to the second output terminal of the processing unit 202.
In the case that the second signal pin 208 is connected and the temperature of the charging interface is determined to be greater than the preset temperature according to the temperature detection unit 203, the processing unit 202 may disconnect the connection between the second signal pin 208 and the ground terminal by controlling the second switch 209, so as to power off the power input pin 204.
In the embodiment of the present application, in the case that the first signal pin 206 is a CC1 pin, the second signal pin 208 is a CC2 pin. Correspondingly, in the case where the first signal pin 206 is the CC2 pin, the second signal pin 208 is the CC1 pin.
In the embodiment of the present application, the description of the second switch 209 and the first switch 201 is the same, and the description of the second signal pin 208 and the first signal pin 206 is the same, and will not be repeated here.
In the embodiment of the application, whether the data line is inserted in the Type-C interface or reversely inserted in the Type-C interface, the charging interface can be prevented from being burnt.
In an embodiment of the present application, as shown in fig. 5, the charging circuit of the terminal device provided in the embodiment of the present application further includes a second resistor 210. The second switch 209 is connected to the ground terminal through a second resistor 210.
In the embodiment of the present application, the description of the second resistor 210 is the same as that of the first resistor 207 described above, and will not be repeated here.
In one embodiment of the present application, as shown in fig. 6, the charging circuit of the terminal device provided in the embodiment of the present application further includes a first voltage detecting unit 211. Wherein:
An input terminal of the first voltage detecting unit 211 is connected to the first signal pin 206, and an output terminal of the first voltage detecting unit 211 is connected to a second input terminal of the processing unit 202. Wherein, the processing unit 202 determines whether the first signal pin 206 is connected according to the voltage detection result output by the first voltage detection unit 211.
In the embodiment of the present application, the first voltage detection unit 211 is configured to detect the voltage of the first signal pin 206 and report the voltage detection result to the processing unit 202.
When the data line is plugged into the charging interface to charge the terminal device, the first signal pin 206 is in communication with the third signal pin 108, and at this time, a voltage signal is present on the first signal pin 206. On this basis, when the processing unit 202 determines that the voltage signal exists on the first signal pin 206 according to the voltage detection result reported by the voltage detection unit 211, it is determined that the first signal pin 206 is connected. Correspondingly, when the processing unit 202 determines that the voltage signal does not exist on the first signal pin 206 according to the voltage detection result reported by the voltage detection unit 211, it is determined that the first signal pin 206 is not connected, i.e. is suspended.
In one embodiment of the present application, as shown in fig. 6, the charging circuit of the terminal device provided in the embodiment of the present application further includes a second voltage detection unit 212. An input terminal of the second voltage detection unit 212 is connected to the second signal pin 208, and an output terminal of the second voltage detection unit 212 is connected to a third input terminal of the processing unit 202.
Wherein, the processing unit 202 determines whether the second signal pin 208 is connected according to the voltage detection result output by the second voltage detection unit 212.
In the embodiment of the present application, the second voltage detection unit 212 is the same as the first voltage detection unit 211, and the description thereof is omitted herein.
In one embodiment of the present application, in the embodiment including the first switch 201 or the embodiment including the second switch 209, the switch may be a single pole double throw switch, where the moving contact of the single pole double throw switch is connected to the corresponding signal pin, the first fixed contact of the single pole double throw switch is connected to the ground terminal, and the second fixed contact of the single pole double throw switch is connected to the power output terminal of the set voltage source.
The control switch is disconnected, and a movable contact of the control switch is connected with a power output end of a set voltage source.
In the embodiment of the present application including the first switch 201, the first switch 201 is a single pole double throw switch, the movable contact of the single pole double throw switch is connected to the first signal pin 206, the first stationary contact of the single pole double throw switch is connected to the ground terminal, and the second stationary contact of the single pole double throw switch is connected to the power output terminal of the set voltage source. On the basis, the first switch 201 is controlled to be turned off specifically: the movable contact of the single-pole double-throw switch is controlled to be connected with the second fixed contact.
In embodiments of the present application that include the second switch 209, the second switch 209 is a single pole double throw switch having a movable contact connected to the second signal pin 208, a first stationary contact connected to ground, and a second stationary contact connected to a power output of a set voltage source. On the basis, the second switch 209 is controlled to be turned off specifically: the movable contact of the single-pole double-throw switch is controlled to be connected with the second fixed contact.
In the embodiment of the application, the movable contact of the control switch is connected with the second stationary contact, so that a voltage greater than R1/(r1+rp1) ×vbus is connected to the corresponding signal pin under the condition that the corresponding signal pin is communicated. At this time, the voltage at the control terminal of the voltage control switch 107 will be greater than R1/(r1+rp1) ×vbus, and the voltage control switch 107 may be in a stable off state.
In the embodiment of the application, the set voltage source is usually a 5V voltage source.
In embodiments of the present application, the voltage controlled switch 107 is controlled to be in a stable off state by implementing the switch as a single pole double throw switch.
The embodiment of the application also provides terminal equipment, which comprises the charging circuit of the terminal equipment provided by any embodiment.
In the implementation of the present application, the terminal device may be exemplified by a smart phone, a tablet computer, a smart watch, etc.
The embodiment of the application also provides a terminal system, which comprises the terminal equipment provided by the embodiment and the data line provided by the embodiment.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.
Claims (8)
1. The utility model provides a terminal system, its characterized in that, terminal system includes terminal equipment and data line, wherein, terminal equipment includes charging circuit, charging circuit includes first switch, processing unit, temperature detection unit and charging interface, the charging interface includes power input pin and first signal pin, wherein:
The first switch is connected between the first signal pin and the grounding end, and the control end of the first switch is connected with the first output end of the processing unit;
the first input end of the processing unit is connected with the output end of the temperature detection unit;
When the first signal pin is communicated and the temperature detection unit detects that the temperature of the charging interface is greater than a preset temperature, the processing unit can disconnect the first signal pin from the grounding end by controlling the first switch, so that the power input pin is powered off;
And, the data line includes: input power pin, output power pin, input ground connection pin, output ground connection pin, third resistance, fourth resistance, voltage control switch and the third signal pin of first signal pin matching, wherein:
The voltage control switch is connected between the input end power supply pin and the output end power supply pin, and the control end of the voltage control switch is connected with the third signal pin;
the third resistor is connected between the input end power pin and the third signal pin;
the fourth resistor is connected between the third signal pin and the output end grounding pin;
the input end grounding pin is connected with the output end grounding pin;
and when the third signal pin is communicated and the first switch is disconnected, the voltage control switch is disconnected.
2. The termination system of claim 1, wherein the voltage control switch is a PMOS transistor, a source of the PMOS transistor is connected to the input power pin, a drain of the PMOS transistor is connected to the output power pin, and a control terminal of the PMOS transistor is connected to the third signal pin.
3. The termination system of claim 1, wherein the charging circuit further comprises a first resistor, and wherein the first switch is coupled to the ground terminal through the first resistor.
4. The end system of claim 1, wherein the charging interface further comprises a second signal pin, the charging circuit further comprising a second switch, wherein:
The second switch is connected between the second signal pin and the grounding end, and the control end of the second switch is connected with the second output end of the processing unit;
And under the condition that the second signal pin is communicated and the temperature detection unit detects that the temperature of the charging interface is greater than the preset temperature, the processing unit can disconnect the connection between the second signal pin and the grounding end by controlling the second switch, so that the power input pin is powered off.
5. The termination system of claim 4, wherein the charging circuit further comprises a second resistor, the second switch being coupled to the ground terminal through the second resistor.
6. The terminal system of claim 1, wherein the charging circuit further comprises a first voltage detection unit,
The input end of the first voltage detection unit is connected with the first signal pin, and the output end of the first voltage detection unit is connected with the second input end of the processing unit;
the processing unit determines whether the first signal pins are communicated according to the voltage detection result output by the first voltage detection unit.
7. The terminal system of claim 4, wherein the charging circuit further comprises a second voltage detection unit,
The input end of the second voltage detection unit is connected with the second signal pin, and the output end of the second voltage detection unit is connected with the third input end of the processing unit;
the processing unit determines whether the second signal pins are communicated according to the voltage detection result output by the second voltage detection unit.
8. The terminal system of claim 4, wherein the switch is a single pole double throw switch, the movable contact of the single pole double throw switch is connected to a corresponding signal pin, the first stationary contact of the single pole double throw switch is connected to the ground, and the second stationary contact of the single pole double throw switch is connected to a power output of a set voltage source;
the control of the switch to be disconnected comprises controlling the movable contact of the switch to be connected with the power output end of the set voltage source, wherein the switch is a first switch or a second switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110123318.9A CN112910041B (en) | 2021-01-28 | Charging circuit of terminal equipment, terminal equipment and terminal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110123318.9A CN112910041B (en) | 2021-01-28 | Charging circuit of terminal equipment, terminal equipment and terminal system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112910041A CN112910041A (en) | 2021-06-04 |
| CN112910041B true CN112910041B (en) | 2024-06-25 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106602513A (en) * | 2017-01-13 | 2017-04-26 | 顺丰科技有限公司 | Short circuit protection charging interface and control method thereof |
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106602513A (en) * | 2017-01-13 | 2017-04-26 | 顺丰科技有限公司 | Short circuit protection charging interface and control method thereof |
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