CN112910041A - 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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- CN112910041A CN112910041A CN202110123318.9A CN202110123318A CN112910041A CN 112910041 A CN112910041 A CN 112910041A CN 202110123318 A CN202110123318 A CN 202110123318A CN 112910041 A CN112910041 A CN 112910041A
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- 238000001514 detection method Methods 0.000 claims abstract description 40
- 238000010586 diagram Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
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- 239000012535 impurity Substances 0.000 description 1
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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
- H02J7/00309—Overheat or overtemperature protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
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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
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application discloses charging circuit, terminal equipment and terminal system of terminal equipment, belongs to the electronic circuit field. Wherein the charging circuit of the terminal equipment includes: first switch, processing unit, temperature detecting element and the interface that charges, the interface that charges includes power input pin and first signal pin, wherein: the first switch is connected between the first signal pin and the grounding terminal, and the control terminal of the first switch is connected with the first output terminal 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 higher than the preset temperature, the processing unit can enable the power input pin to be powered off by controlling the first switch to disconnect the first signal pin from the grounding end. The circuit can solve the problem that a charging interface in a charging circuit of the terminal equipment is burnt.
Description
Technical Field
The application belongs to the field of electronic circuits, and particularly relates to a charging circuit of a terminal device, the terminal device and a terminal system.
Background
Currently, when a user determines that the charging of the mobile phone by the charger is completed, the user usually only pulls the mobile phone out of the charger. At this point, the charger is still plugged into a live power outlet.
When the charger is plugged into a power socket with electricity, the interface of the data line in the charger, which is connected with the charging interface of the mobile phone, is always electrified. If liquid or impurities enter the live interface, this will cause the metal pins of the live interface to corrode, which in turn will cause the impedance of the live interface to increase. When the charger is used for charging the mobile phone subsequently, the charging interface of the mobile phone is burnt out due to self-leakage heating caused by the fact that the impedance of the interface of the data line connected with the mobile phone is increased and/or the interface of the data line connected with the mobile phone is short-circuited due to the corrosion of metal pins.
Content of application
The embodiment of the application aims to provide a charging circuit of a terminal device, which can solve the problem that a charging interface in the charging circuit of the terminal device is burnt.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a charging circuit for a terminal device, where the 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 a ground terminal, and a control terminal of the first switch is connected with a first output terminal 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 higher than the preset temperature, the processing unit can enable the power input pin to be powered off by controlling the first switch to disconnect the first signal pin from the grounding end.
In a second aspect, an embodiment of the present application provides a terminal device, where the terminal device includes the charging circuit of the 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 pin, third resistance, fourth resistance, voltage control switch, with the third signal pin that first signal pin matches, wherein:
the voltage control switch is connected between the input end power pin and the output end power 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;
the voltage controlled switch is turned off in case the first switch in the terminal device is turned off.
In an embodiment of the present application, a charging circuit of a terminal device is provided, where the 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 terminal, and the control terminal of the first switch is connected with the first output terminal 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 higher than the preset temperature, the temperature of the charging interface is determined to be too high, and the charging interface has the risk of being burnt. At this time, the processing unit can cut off the power supply input pin by controlling the first switch to disconnect the first signal pin from 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 device provided by the embodiment of the application can avoid the problems that the impedance of the interface of the charging interface connected with the data line is increased, and/or the interface of the data line connected with the charging interface is short-circuited due to the corrosion of the metal pin, so that the self-leakage heating is generated, and the charging interface is burnt.
Drawings
Fig. 1 is a schematic structural diagram of a data line according to an embodiment of the present disclosure;
fig. 2 is a first schematic structural diagram of a charging circuit of a terminal device according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a charging circuit of a terminal device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram three 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 disclosure;
fig. 6 is a fifth schematic structural diagram of a charging circuit of a terminal device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. 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 application.
The terms first, second and the like in the description and in the claims of the present application 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 is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The charging circuit, the terminal device, and the terminal system of the terminal device provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
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 matched with 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 ground pin 103 is connected to the output ground pin 104.
In the case where the third signal pin 108 is connected and the first switch 201 in the terminal device is turned off, the voltage control switch 107 is turned off.
In the embodiment of the present application, the input power pin 101 and the input ground pin 103 are respectively used for connecting with a pin corresponding to an interface on a charging head in a charger. The output power pin 102 is used for connecting with a power input pin 204 in a charging interface of the terminal device. The output ground pin 104 is used for connecting with a ground pin 205 in a charging interface of the terminal device. The third signal pin 108 is used for connecting with the first signal pin 206 in the charging interface of the terminal device.
It should be noted that 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 a signal pin multiplexing one of the interfaces connected to the charging interface of the terminal device in the existing data line, such as a SUB pin, a CC pin, and the like.
In the embodiment of the present application, a voltage control switch 107 is provided between the input power pin 101 and the output power 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 a conducting state or a disconnecting state. When the voltage control switch 107 is in the off state, the path between the input power pin 101 and the output power 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, that is, the terminal device cannot be charged.
Correspondingly, when the voltage control switch 107 is in the on state, the path between the input terminal power pin 101 and the output terminal power pin 102 is on, so that the data line can supply power to the charging interface of the terminal device when the data line is inserted into the charging interface of the terminal device, that is, the terminal device can be charged.
In the embodiment of the present application, the third resistor 105 and the sixth resistor 106 are provided to provide a basis for controlling the on/off of the voltage control switch 107.
In an 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 of the end of the voltage control switch 107 connected to the input power pin 101 is R1/(R1+ Rp) × Vbus, where R1 is the resistance value of the third resistor 105, Rp is the resistance value 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 receives a voltage greater than R1/(R1+ Rp1) × Vbus, the voltage control switch 107 is in the 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 the conducting state.
In the embodiment of the present application, in the case that the third signal pin 108 is connected, the data line is 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 associated with the on-off state of the voltage control switch 107, so as to control the first switch 102 to be turned off in the case that the temperature of the charging interface of the terminal device is greater than the preset temperature, and to control the voltage control switch 107 to be turned off in the 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, a source of the PMOS transistor is connected to the input power pin 101, 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.
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 into a live power supply socket, power supply to a charging interface of a terminal device through the charging line can be realized, and power non-supply to the charging interface of the terminal device under the control of the terminal device can also be realized.
As shown in fig. 2, the charging circuit of the terminal device further includes a first switch 201, a processing unit 202, a temperature detecting unit 203, and a charging interface, where 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 terminal, and the control terminal of the first switch 201 is connected with the first output terminal of the processing unit 202; a first input of the processing unit 202 is connected to an output of the temperature detection unit 203.
When the first signal pin 206 is connected and the temperature detection unit 203 detects that the temperature of the charging interface is higher than the preset temperature, the processing unit 202 can disconnect the first signal pin 206 from the ground terminal by controlling the first switch 201, so as to cut off the power supply input pin 204.
It is understood that the charging interface further comprises a ground pin 205, and the ground pin 205 is connected to the 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 detection unit 203 may be a thermistor, but may be another component for detecting temperature.
It should be noted 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 one of the existing charging interfaces, such as a SUB pin or a CC pin.
In the embodiment of the present application, in the case where 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, it is explained that 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 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. The processing unit 202 determines that the temperature of the charging interface is too high and the charging interface is in a risk of being burnt out when determining that the temperature of the charging interface is higher than the preset temperature according to the temperature information. At this time, the processing unit 202 controls the first switch 201 to be turned off.
In conjunction with the structure of the data line shown in fig. 1, in the case where the processing unit 202 controls the first switch 201 to be turned off, the voltage of the end of the voltage control switch 107 connected to the input terminal power supply pin 101 is the same as the voltage of the control end of the voltage control switch 107. At this time, the voltage control switch 107 is in an off state. In this way, although the data line is inserted into the charging interface of the terminal device, the circuit between the output terminal power pin 102 in the data line and the power input pin 204 in the charging interface is broken, that is, the power input pin 204 is powered off, and at this time, the data line cannot supply power to the charging interface. Furthermore, 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 under the condition that the temperature of the charging interface is determined to be less than or equal to the preset temperature according to the temperature information, and the charging interface does not have the 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 as shown in fig. 1, the processing unit 202 controls the first switch 201 to be turned on, and the voltage of 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 conducting state. In this way, when the data line is inserted into the charging interface of the terminal device, the circuit between the output terminal power pin 102 in the data line and the power input pin 204 in the charging interface is turned on, so that the data line can supply power to the charging interface, that is, the terminal device can be charged.
In an embodiment of the present application, a charging circuit of a terminal device is provided, where the 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 terminal, and the control terminal of the first switch is connected with the first output terminal 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 higher than the preset temperature, the temperature of the charging interface is determined to be too high, and the charging interface has the risk of being burnt. At this time, the processing unit can cut off the power supply input pin by controlling the first switch to disconnect the first signal pin from 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 device provided by the embodiment of the application can avoid the problems that the charging interface is heated due to self-leakage caused by short circuit caused by the corrosion of the metal pin and the increase of the impedance of the data line connected with the charging interface and/or the interface of the data line connected with the charging interface, 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 via a first resistor 207.
In the embodiment of the present application, the first resistor 207 acts as a pull-down resistor to stably pull down the voltage at the control terminal of the voltage control switch 107 when 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 5.1K Ω.
In one embodiment of the present 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 interface that charges is Type-C interface, the CC pin in the interface that charges passes through switch and resistance ground connection. 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 reuse the switch and the resistor connected to the CC pin in the charging interface. Therefore, when the first signal pin is the CC pin, the number of components can be reduced, and the integration difficulty of a charging circuit of the terminal equipment is reduced.
It should be noted that, two CC pins, namely a CC1 pin and a CC2 pin, are arranged in the Type-C interface. When the data line is being plugged in the Type-C interface, the third signal pin is connected with the CC1 pin. When the data line is reversely inserted into 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 terminal, and a control terminal of the second switch 209 is connected to the second output terminal of the processing unit 202.
When the second signal pin 208 is connected and the temperature of the charging interface is determined to be higher than the preset temperature according to the temperature detection unit 203, the processing unit 202 can disconnect the second signal pin 208 from the ground terminal by controlling the second switch 209, so as to disconnect the power input pin 204.
In the embodiment of the present application, in the case where the first signal pin 206 is the CC1 pin, the second signal pin 208 is the CC2 pin. Correspondingly, in the case that 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 second switch 209 and the first switch 201 are described in the same way, and the second signal pin 208 and the first signal pin 206 are described in the same way, and thus the description thereof is omitted.
In the embodiment of the application, no matter the data line is inserted into the Type-C interface or reversely inserted into 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 via a second resistor 210.
In the embodiment of the present application, the description of the second resistor 210 is the same as the description of the first resistor 207, and is not repeated here.
In an 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 detection unit 211. Wherein:
an input terminal of the first voltage detection unit 211 is connected to the first signal pin 206, and an output terminal of the first voltage detection unit 211 is connected to a second input terminal of the processing unit 202. 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 detecting unit 211 is configured to detect a voltage of the first signal pin 206 and report a voltage detection result to the processing unit 202.
When the data line is inserted into the charging interface to charge the terminal device, the first signal pin 206 is connected to the third signal pin 108, and at this time, a voltage signal exists 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 determines that the first signal pin 206 is connected. Correspondingly, when the processing unit 202 determines that no voltage signal exists on the first signal pin 206 according to the voltage detection result reported by the voltage detection unit 211, it determines that the first signal pin 206 is not connected, i.e., is floating.
In an 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.
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 descriptions of the second voltage detecting unit 212 and the first voltage detecting unit 211 are the same, and are not repeated herein.
In one embodiment of the present application, in the above-mentioned embodiment including the first switch 201 or the embodiment including the second switch 209, the switch may be a single-pole double-throw switch, a moving contact of the single-pole double-throw switch is connected to a corresponding signal pin, a first stationary contact of the single-pole double-throw switch is connected to the ground terminal, and a second stationary contact of the single-pole double-throw switch is connected to a power supply output terminal of the set voltage source.
Wherein, the control switch disconnection comprises the connection of the movable contact of the control switch and the power supply output end of the set voltage source.
In the embodiment including the first switch 201, the first switch 201 is a single-pole double-throw switch, a moving contact of the single-pole double-throw switch is connected to the first signal pin 206, a first stationary contact of the single-pole double-throw switch is connected to the ground terminal, and a second stationary contact of the single-pole double-throw switch is connected to the power supply output terminal of the set voltage source. On this basis, the specific steps of controlling the first switch 201 to be turned off are: and controlling the movable contact of the single-pole double-throw switch to be connected with the second fixed contact.
In the embodiment of the present application including the second switch 209, the second switch 209 is a single-pole double-throw switch, a moving contact of the single-pole double-throw switch is connected to the second signal pin 208, a first stationary contact of the single-pole double-throw switch is connected to the ground terminal, and a second stationary contact of the single-pole double-throw switch is connected to the power supply output terminal of the set voltage source. On this basis, the specific steps of controlling the second switch 209 to be turned off are: and controlling the movable contact of the single-pole double-throw switch 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 fixed contact, so that under the condition that the corresponding signal pin is communicated, the voltage which is more than R1/(R1+ Rp1) × Vbus is connected at the corresponding signal pin. At this time, the voltage of the control terminal of the voltage control switch 107 will be greater than R1/(R1+ Rp1) × Vbus, and the voltage control switch 107 can be in a stable off state.
In the embodiment of the present application, the set voltage source is typically a 5V voltage source.
In the embodiment of the present application, the voltage control switch 107 can be controlled to be in a stable off state by implementing the switch with a single-pole double-throw switch.
The embodiment of the application further provides a terminal device, and the terminal device comprises the charging circuit of the terminal device provided by any one of the embodiments.
In the implementation of the present application, the terminal device may be exemplified by a smart phone, a tablet computer, a smart watch, and the like.
The embodiment of the application also provides a terminal system, which comprises the terminal device provided by the embodiment and the data line provided by the embodiment.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a charging circuit of terminal equipment, its characterized in that, the circuit includes first switch, processing unit, temperature detecting element and the interface that charges, the interface that charges includes power input pin and first signal pin, wherein:
the first switch is connected between the first signal pin and a ground terminal, and a control terminal of the first switch is connected with a first output terminal 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 higher than the preset temperature, the processing unit can enable the power input pin to be powered off by controlling the first switch to disconnect the first signal pin from the grounding end.
2. The circuit of claim 1, further comprising a first resistor, wherein the first switch is coupled to the ground terminal through the first resistor.
3. The circuit of claim 1, wherein the charging interface further comprises a second signal pin, the circuit further comprising a second switch, wherein:
the second switch is connected between the second signal pin and the grounding terminal, and a control terminal of the second switch is connected with a second output terminal of the processing unit;
under the condition that the second signal pin is communicated and the temperature detection unit detects that the temperature of the charging interface is higher than the preset temperature, the processing unit can enable the power input pin to be powered off by controlling the second switch to disconnect the second signal pin from the grounding end.
4. The circuit of claim 3, further comprising a second resistor, wherein the second switch is connected to the ground terminal through the second resistor.
5. The circuit of claim 1, further comprising 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 pin is connected or not according to the voltage detection result output by the first voltage detection unit.
6. The circuit of claim 3, further comprising 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;
and the processing unit determines whether the second signal pin is communicated or not according to the voltage detection result output by the second voltage detection unit.
7. The circuit according to claim 1 or 3, wherein the switch is a single-pole double-throw switch, a moving contact of the single-pole double-throw switch is connected with a corresponding signal pin, a first stationary contact of the single-pole double-throw switch is connected with the ground terminal, and a second stationary contact of the single-pole double-throw switch is connected with a power supply output terminal of a set voltage source;
wherein controlling the switch to open comprises controlling a movable contact of the switch to connect with a power supply output terminal of the set voltage source.
8. A terminal device, characterized in that it comprises a charging circuit of a terminal device according to any one of claims 1-7.
9. A terminal system, characterized in that the terminal system comprises the terminal device of claim 8 and a data line, wherein the data line comprises: input power pin, output power pin, input ground pin, output ground pin, third resistance, fourth resistance, voltage control switch and with the third signal pin that first signal pin matches, wherein:
the voltage control switch is connected between the input end power pin and the output end power 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 under the condition that the third signal pin is connected and the first switch in the terminal equipment is disconnected, the voltage control switch is disconnected.
10. The terminal device of claim 9, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110123318.9A CN112910041B (en) | 2021-01-28 | 2021-01-28 | Charging circuit of terminal equipment, terminal equipment and terminal system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115016007A (en) * | 2021-09-17 | 2022-09-06 | 荣耀终端有限公司 | Electronic device and electronic system |
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| US20160064977A1 (en) * | 2014-08-29 | 2016-03-03 | Spreadtrum Communications (Shanghai) Co., Ltd. | Usb charger, mobile terminal and charging method thereof |
| 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 |
| CN109378878A (en) * | 2018-11-13 | 2019-02-22 | Oppo（重庆）智能科技有限公司 | Charging circuit, charging method, electronic equipment and storage medium |
| CN111697663A (en) * | 2020-06-29 | 2020-09-22 | 维沃移动通信有限公司 | Charging circuit and charging cable |
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| US20160064977A1 (en) * | 2014-08-29 | 2016-03-03 | Spreadtrum Communications (Shanghai) Co., Ltd. | Usb charger, mobile terminal and charging method thereof |
| 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 |
| CN109378878A (en) * | 2018-11-13 | 2019-02-22 | Oppo（重庆）智能科技有限公司 | Charging circuit, charging method, electronic equipment and storage medium |
| CN111697663A (en) * | 2020-06-29 | 2020-09-22 | 维沃移动通信有限公司 | Charging circuit and charging cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115016007A (en) * | 2021-09-17 | 2022-09-06 | 荣耀终端有限公司 | Electronic device and electronic system |
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| CN112910041B (en) | 2024-06-25 |
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