CN213661246U - Charging circuit, charging equipment and charging system - Google Patents
Charging circuit, charging equipment and charging system Download PDFInfo
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- CN213661246U CN213661246U CN202022557586.5U CN202022557586U CN213661246U CN 213661246 U CN213661246 U CN 213661246U CN 202022557586 U CN202022557586 U CN 202022557586U CN 213661246 U CN213661246 U CN 213661246U
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Abstract
The embodiment of the application relates to a charging circuit, battery charging outfit and charging system, and charging circuit sets up in battery charging outfit, and battery charging outfit includes: the conversion circuit is used for converting a power supply signal of an external power supply into a charging signal; the first charging pin is used for connecting the electronic equipment so as to transmit a charging signal to the electronic equipment; the first detection pin is used for connecting electronic equipment; the detection circuit is connected with the first detection pin and used for outputting a preset signal according to the on-off state between the first detection pin and the electronic equipment; and the switch circuit is respectively connected with the detection circuit, the conversion circuit and the first charging pin and used for receiving a preset signal and controlling the on-off of a transmission path of the charging signal according to the preset signal. When the first detection pin is disconnected with the electronic equipment, the switching circuit controls the disconnection of the transmission path of the charging signal, so that the first charging pin is prevented from being short-circuited in a non-charging state, and the charging circuit with higher safety and reliability is further provided.
Description
Technical Field
The embodiment of the application relates to the technical field of charging, in particular to a charging circuit, charging equipment and a charging system.
Background
The charger is an essential supporting component of the electronic device. However, the charging interface of the charger is usually in an exposed structure, if conductive objects such as a key ring, a chain and a ring are in contact with the exposed charging interface, the interface is easily short-circuited, and then the charger is heated to melt the shell, so that the safety and the reliability of the charger are greatly influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, it is necessary to provide a charging circuit, a charging device, and a charging system for solving the problem of insufficient safety and reliability of a charger.
A charging circuit is arranged on a charging device, and comprises:
the conversion circuit is used for converting a power supply signal of an external power supply into a charging signal;
the first charging pin is used for being connected with electronic equipment so as to transmit the charging signal to the electronic equipment;
the first detection pin is used for connecting the electronic equipment;
the detection circuit is connected with the first detection pin and used for outputting a preset signal according to the on-off state between the first detection pin and the electronic equipment;
and the switching circuit is respectively connected with the detection circuit, the conversion circuit and the first charging pin and is used for receiving the preset signal and controlling the on-off of a transmission path of the charging signal according to the preset signal.
A charging device comprises the charging circuit.
A charging system, comprising:
a charging device as described above;
an electronic device, the electronic device comprising:
the second charging pin is connected with the first charging pin and used for receiving the charging signal;
the second detection pin is connected with the first detection pin;
and the pull-down resistor is respectively connected with the second detection pin and the grounding terminal, and is used for pulling down the first detection pin to a low level voltage when the second detection pin is conducted with the first detection pin so as to output a preset signal to the switch circuit.
Above-mentioned charging circuit, battery charging outfit and charging system, charging circuit sets up in battery charging outfit, charging circuit includes: the conversion circuit is used for converting a power supply signal of an external power supply into a charging signal; the first charging pin is used for being connected with electronic equipment so as to transmit the charging signal to the electronic equipment; the first detection pin is used for connecting the electronic equipment; the detection circuit is connected with the first detection pin and used for outputting a preset signal according to the on-off state between the first detection pin and the electronic equipment; and the switching circuit is respectively connected with the detection circuit, the conversion circuit and the first charging pin and is used for receiving the preset signal and controlling the on-off of a transmission path of the charging signal according to the preset signal. Through the detection circuit, the on-off state between the first detection pin and the electronic equipment can be accurately acquired, so that the disconnection of the transmission path of the charging signal can be controlled by the switch circuit when the first detection pin is disconnected with the electronic equipment, the short circuit of the first charging pin in a non-charging state is avoided, and the charging circuit with higher safety and reliability is further provided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a charging circuit 100 according to an embodiment;
fig. 2 is a second schematic diagram of the charging circuit 100 according to an embodiment;
fig. 3 is a third schematic diagram of the charging circuit 100 according to an embodiment;
fig. 4 is a fourth schematic diagram of the charging circuit 100 according to an embodiment;
fig. 5 is one of the pin diagrams of the charging device 10 according to an embodiment;
fig. 6 is a second pin diagram of the charging apparatus 10 according to an embodiment;
fig. 7 is a third pin diagram of the charging apparatus 10 according to an embodiment;
fig. 8 is a left side view of the charging device of the embodiment of fig. 5;
fig. 9 is a schematic top view of the charging device of the embodiment of fig. 5;
fig. 10 is a schematic structural diagram of a charging system according to an embodiment;
fig. 11 is a second schematic structural diagram of a charging system according to an embodiment;
fig. 12 is a third schematic structural diagram of a charging system according to an embodiment.
Element number description:
a charging device: 10; a charging circuit: 100, respectively; a conversion circuit: 110; the detection circuit: 120 of a solvent; and (3) detection line: 121, a carrier; a switching circuit: 130, 130; a switch: 131; a voltage comparison circuit: 132; a suspension test circuit: 133; a housing: 140 of a solvent; an electronic device: 20; a power supply: 30.
Detailed Description
To facilitate an understanding of the embodiments of the present application, the embodiments of the present application will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. The embodiments of the present application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments of this application belong. The terminology used herein in the description of the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the embodiments of the present application, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on methods or positional relationships shown in the drawings, and are only used for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the embodiments of the present application.
Fig. 1 is a schematic structural diagram of a charging circuit 100 according to an embodiment, in which the charging circuit 100 of the embodiment is disposed in a charging device 10, and the charging device 10 is used for charging a connected electronic device 20. The charging device 10 is connected with the electronic device 20 to be charged through a charging interface, and the charging device 10 can charge a battery of the electronic device 20 to be charged through a charging pin in the charging interface. The electronic device 20 to be charged may refer to a terminal, and the "terminal" may be, but is not limited to, a smart phone, a computer, a Personal Digital Assistant (PDA), a wearable device, a bluetooth headset, a game device, an image pickup device, and the like. The charging device 10 may be, but is not limited to, a charging wire and a charging cradle, and the charging cradle may be a magnetic-type charging cradle, a slot-type charging cradle, or the like. In the embodiments of the present application, the electronic device 20 is a smart watch, and the charging device 10 is a charging cradle of the smart watch. Referring to fig. 1, in the present embodiment, the charging circuit 100 includes a converting circuit 110, a first charging pin VBUS1, a first detection pin TEST1, a detection circuit 120, and a switching circuit 130. Herein, each pin in the present application may be understood as a POGO pin (POGO pin).
The conversion circuit 110 is configured to convert a power supply signal of the external power supply 30 into a charging signal. The external power supply 30 may be, for example, a commercial power, a mobile power supply, a solar battery, or other electronic devices 20 with a discharging function. It is understood that different power supplies 30 have different characteristics of power voltage, current, power, etc., but the electronic device 20 being charged is generally configured with better charging parameters to achieve faster charging speed and avoid damage to the battery of the electronic device 20. Therefore, in the present embodiment, by providing the conversion circuit 110 and adjusting the electrical performance of the power supply signal by using the conversion circuit 110, the charging signal suitable for the electronic device 20 can be generated, thereby improving the flexibility and the practicability of the charging circuit 100.
A first charging pin VBUS1 for connecting to the electronic device 20 to transmit the charging signal to the electronic device 20. Wherein the charging signal is used to charge the electronic device 20.
A first TEST pin TEST1 for connecting the electronic device 20. In the present embodiment, the on-off state of the first detection pin TEST1 is the same as the on-off state of the charging circuit 100. Specifically, when the first TEST pin TEST1 is connected to the electronic device 20, i.e., the first TEST pin TEST1 is connected to the electronic device 20, indicating that the charging circuit 100 is also connected to the electronic device 20, the electronic device 20 can be charged through the first charging pin VBUS 1; when the first TEST pin TEST1 is not connected to the electronic device 20, i.e., the first TEST pin TEST1 is disconnected from the electronic device 20, it means that the charging circuit 100 is not connected to the electronic device 20, and the electronic device 20 cannot be charged through the first charging pin VBUS 1. Therefore, based on the first detection pin TEST1, the on-off state between the charging circuit 100 and the electronic device 20 can be determined, thereby implementing the corresponding control function.
The detection circuit 120 is connected to the first detection pin TEST1, and configured to output a preset signal according to an on/off state between the first detection pin TEST1 and the electronic device 20. When the first TEST pin TEST1 and the electronic device 20 are turned on or off, the TEST circuit 120 and the circuits in the electronic device 20 together form a different overall circuit structure, and accordingly, the TEST circuit 120 also outputs different preset electrical signals, i.e., preset signals. Therefore, the on-off state between the first TEST pin TEST1 and the electronic device 20 can be accurately obtained by presetting the parameters of the electrical signal. Wherein the preset electrical signal may be, but is not limited to, a voltage signal, a current signal, etc.
The switch circuit 130 is connected to the detection circuit 120, the conversion circuit 110, and the first charging pin VBUS1, and is configured to receive the preset signal and control on/off of a transmission path of the charging signal according to the preset signal. For example, the switch circuit 130 may include a switch 131, the preset signal is a voltage signal, and a control terminal of the switch 131 is configured to receive the preset signal, so as to control the connection or disconnection between two data terminals of the switch 131 according to the preset signal, thereby controlling the connection or disconnection of the transmission path of the charging signal. As another example, the switch circuit 130 may include an electromagnetic switch 131, the preset signal is a current signal, and the electromagnetic switch 131 is responsive to the input current magnitude to implement the function of the switch 131, so as to control the on/off of the transmission path of the charging signal. It should be clear that the above examples are intended to be illustrative only and are not intended to limit the scope of protection of the present application.
In this embodiment, a charging circuit 100 is provided in the charging device 10, the charging circuit 100 includes: a conversion circuit 110 for converting a power supply signal of the external power supply 30 into a charging signal; a first charging pin VBUS1 for connecting to an electronic device 20 to transmit the charging signal to the electronic device 20; a first TEST pin TEST1 for connecting the electronic device 20; the detection circuit 120 is connected to the first detection pin TEST1, and configured to output a preset signal according to an on-off state between the first detection pin TEST1 and the electronic device 20; the switch circuit 130 is connected to the detection circuit 120, the conversion circuit 110, and the first charging pin VBUS1, and is configured to receive the preset signal and control on/off of a transmission path of the charging signal according to the preset signal. Through the detection circuit 120, the on-off state between the first detection pin TEST1 and the electronic device 20 can be accurately obtained, so that when the first detection pin TEST1 is disconnected from the electronic device 20, the switch circuit 130 controls the disconnection of the transmission path of the charging signal, the first charging pin VBUS1 is prevented from being short-circuited in a non-charging state, and the charging circuit 100 with higher safety and reliability is further provided.
In one embodiment, the switch circuit 130 is configured with a control terminal, and the detection circuit 120 includes:
a pull-up resistor R1, a first end of the pull-up resistor R1 is connected to the output end of the conversion circuit 110, a second end of the pull-up resistor is connected to the control end of the switch circuit 130 and the first detection pin TEST1, respectively, the pull-up resistor R1 is configured to output a high level signal from the second end when the first detection pin TEST1 is disconnected from the electronic device 20, and the high level signal is used to control the switch circuit 130 to be disconnected.
Fig. 2 is a second schematic structural diagram of the charging circuit 100 according to an embodiment, referring to fig. 2, in this embodiment, the switch circuit 130 includes a switch 131 and a voltage comparison circuit 132, where the switch 131 and the voltage comparison circuit 132 may be packaged in a same chip, and the chip is configured with at least one control pin, an input pin and an output pin, the control pin is configured to receive a preset signal, the input pin is configured to receive a charging signal output by the conversion circuit 110, and the output pin is configured to output the charging signal to the first charging pin VBUS 1.
A switch 131, a first terminal of the switch 131 is connected to the converting circuit 110, and a second terminal is connected to the first charging pin VBUS 1. The switch 131 may be a voltage control switch 131.
And a voltage comparison circuit 132, respectively connected to the detection circuit 120 and the switch 131, for receiving the preset signal and controlling the switch 131 to be turned off when the voltage of the preset signal is greater than the threshold voltage. The voltage comparison circuit 132 may be a voltage comparator configured with a threshold voltage input terminal and a comparison signal input terminal, and the voltage comparator compares the voltage values input by the two input terminals and outputs the control signal according to the comparison result. When the voltage of the preset signal is greater than the threshold voltage, the control signal may be a high level signal to control the switch 131 to be turned off; when the voltage of the preset signal is less than or equal to the threshold voltage, the control signal may be a low level signal to control the switch 131 to be turned on.
In some embodiments, the voltage comparison circuit 132 may not be disposed in the switch circuit 130, and the preset signal is directly connected to the switch 131 to control the switch 131 to be turned on or off.
Fig. 3 is a third schematic structural diagram of the charging circuit 100 according to an embodiment, referring to fig. 3, in the present embodiment, the switch circuit 130 is configured with a control terminal, the detection circuit 120 includes a detection line 121, a first terminal of the detection line 121 is connected to the first detection pin TEST1, a second terminal of the detection line is connected to the control terminal of the switch circuit 130, the detection line 121 is configured to output a floating signal from the second terminal when the first detection pin TEST1 is disconnected from the electronic device 20, and the floating signal is configured to control the switch circuit 130 to be disconnected.
Accordingly, the switch circuit 130 includes a floating TEST circuit 133, and the floating TEST circuit 133 is used to detect whether the first TEST pin TEST1 is floating. For example, the floating TEST circuit 133 may detect the resistance to ground of the first TEST pin TEST1 to determine whether the first TEST pin TEST1 is floating. The switch 131 and the floating test circuit 133 may be packaged in the same chip, and the chip is configured with at least one control pin, one input pin, and one output pin, where the control pin is configured to receive a preset signal, that is, a floating signal, the input pin is configured to receive a charging signal output by the conversion circuit 110, and the output pin is configured to output the charging signal to the first charging pin VBUS 1. It is understood that the floating test circuit 133 is not limited to the resistance detection method, and other floating detection methods may be used. In some embodiments, the switch 131 has a floating test function, i.e., the floating test circuit 133 may not be disposed in the switch circuit 130.
Fig. 4 is a fourth schematic structural diagram of the charging circuit 100 according to an embodiment, referring to fig. 4, in the embodiment, the charging circuit 100 further includes a first ground pin GND1, and the first ground pin GND1 is used for connecting the electronic device 20 to transmit a ground signal to the electronic device 20. Further, the charging circuit 100 further includes at least two data transmission pins, for example, a first data pin D1+ and a second data pin D1-, the data transmission pins are used for connecting the electronic device 20 to transmit data signals to the electronic device 20. After the charging device 10 is connected to the electronic device 20 to be charged through the data transmission pin, the charging device 10 and the electronic device 20 to be charged may perform data communication, for example, the electronic device 20 to be charged may collect the state parameter of the battery and send the state parameter of the battery to the charging device 10 through the data transmission pin.
The application also provides a charging device 10 comprising the charging circuit 100 as described above. Fig. 5 is one of pin diagrams of the charging device 10 according to an embodiment, and fig. 5 is a front view of a side of the charging device 10 facing the electronic device 20 during charging. Referring to fig. 5, further, the charging device 10 includes a housing 140 and the aforementioned charging circuit 100, and specifically, includes a conversion circuit 110, a detection circuit 120, a switch circuit 130, and a plurality of pins including a first charging pin VBUS1, a first detection pin TEST1, a first ground pin GND1, and at least two data transmission pins. The housing 140 is configured to accommodate the switching circuit 110, the detection circuit 120 and the switch circuit 130, which are not specifically shown in fig. 5, and the housing 140 is further configured to partially accommodate the plurality of pins, that is, each pin is partially accommodated in the housing 140 and partially exposed outside the housing 140, and the exposed portion is configured to contact with the electronic device 20 to detect and charge the on-off state of the electronic device 20.
In the embodiment shown in fig. 5, the first charging pin VBUS1 and the data transmission pin are partially exposed outside the housing 140 and are arranged in the same line. Further, the data transmission pins may also be arranged on the straight line. It is to be understood that the arrangement of the plurality of pins is not limited to the arrangement provided in fig. 5, and may be arranged in an array arrangement shown in fig. 6.
Optionally, the shape of the housing 140 is not limited to the quadrangular prism structure in the embodiments of fig. 5 and 6, and fig. 7 is a third schematic pin diagram of the charging device 10 of an embodiment, in this embodiment, the housing 140 is in a rounded quadrangular prism structure, in other embodiments, the housing 140 may also be in a cylindrical structure, a hemispherical structure, an octagonal prism structure, and the like, which are not specifically limited in this application.
Fig. 8 is a left side view of the charging device 10 of the embodiment of fig. 5, referring to fig. 8, in this embodiment, the first TEST pin TEST1 is partially exposed outside the housing 140, and the length of the first TEST pin TEST1 exposed outside the housing 140 is longer than the length of the first charging pin VBUS1 exposed outside the housing 140. Based on the above structure, when the charging device 10 and the electronic device 20 are connected to be charged, the first detection pin TEST1 may contact the electronic device 20 earlier than the first charging pin VBUS1, so as to timely conduct the transmission path of the charging signal, thereby improving the response speed of the charging device 10.
Fig. 9 is a schematic top view of the charging device 10 in the embodiment of fig. 5, and referring to fig. 5, in this embodiment, a shape of a surface of the charging device 10 on a side facing the electronic device 20 during charging matches a shape of the electronic device 20, for example, the surface may be an arc shape as shown in the figure, so as to achieve a larger contact area between the charging device 10 and the electronic device 20, and further effectively improve connection stability and reliability during charging.
Fig. 10 is a schematic structural diagram of a charging system according to an embodiment, and referring to fig. 10, in the embodiment, the charging system includes the charging device 10 and the electronic device 20 as described above, and the electronic device 20 includes a second charging pin VBUS2, a second TEST pin TEST2, and a pull-down resistor R2. The second charging pin VBUS2 is connected to the first charging pin VBUS1, and is configured to receive the charging signal. And a second TEST pin TEST2 connected to the first TEST pin TEST 1. A pull-down resistor R2 connected to the second TEST pin TEST2 and the ground, respectively, wherein the pull-down resistor R2 is configured to pull down the first TEST pin TEST1 to a low level voltage when the second TEST pin TEST2 and the first TEST pin TEST1 are turned on, so as to output a predetermined signal, i.e., a low level signal, to the switch circuit 130. In the present embodiment, by providing the charging circuit 100 with an automatic detection function, the on-off state between the charging device 10 and the electronic device 20 can be accurately obtained, so that when the charging device 10 is disconnected from the electronic device 20, the charging device 10 can be controlled to stop charging, thereby preventing the charging device 10 from short-circuiting in a non-charging state, and further providing a charging system with higher safety and reliability.
Fig. 11 is a second schematic structural diagram of the charging system according to the embodiment, referring to fig. 11, in the embodiment, the charging system includes the charging circuit 100 shown in fig. 4, wherein the pull-up resistor R1 is connected to the voltage of the charging signal, and the pull-down resistor R2 is connected to the voltage of the ground. Specifically, when the charging device 10 is connected to the electronic device 20, the first TEST pin TEST1 and the second TEST pin TEST2 are turned on, the pull-up resistor R1 and the pull-down resistor R2 divide the voltage, so that the voltage at the node between the two resistors is lower than the threshold voltage, the voltage comparison circuit 132 turns on the switch 131 according to the comparison result, and the charging device 10 can charge the electronic device 20. When the charging device 10 is not connected to the electronic device 20, the first TEST pin TEST1 and the second TEST pin TEST2 are disconnected, the pull-up resistor R1 pulls up the voltage transmitted to the voltage comparison circuit 132 to be greater than the threshold voltage, the voltage comparison circuit 132 turns off the switch 131 according to the comparison result, and the charging device 10 is not charged.
Further, the electronic device 20 further includes a second ground pin GND2, a third data pin D2+ and a fourth data pin D2-, the second ground pin GND2 is used for connecting the first ground pin, the third data pin D2+ is used for connecting the first data pin D1+, and the fourth data pin D2-is used for connecting the second data pin D1-, so as to implement data communication between the charging device 10 and the electronic device 20.
Fig. 12 is a third schematic structural diagram of the charging system according to the embodiment, referring to fig. 12, in the present embodiment, the detection line 121 is directly connected to the floating test circuit 133, and the pull-down resistor R2 is connected to the voltage of the ground terminal. Specifically, when the charging device 10 is connected to the electronic device 20, the first TEST pin TEST1 and the second TEST pin TEST2 are turned on, the pull-down resistor R2 pulls down the voltage transmitted to the floating TEST circuit 133 to be less than the threshold voltage, the floating TEST circuit 133 turns on the switch 131 according to the detection result, and the charging device 10 can charge the electronic device 20. When the charging device 10 is not connected to the electronic device 20, the first TEST pin TEST1 and the second TEST pin TEST2 are disconnected, the TEST line 121 is suspended, the suspended TEST circuit 133 turns off the switch 131 according to the detection result, and the charging device 10 is not charged.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express a few embodiments of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the concept of the embodiments of the present application, and these embodiments are within the scope of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the appended claims.
Claims (10)
1. A charging circuit, disposed on a charging device, the charging circuit comprising:
the conversion circuit is used for converting a power supply signal of an external power supply into a charging signal;
the first charging pin is used for being connected with electronic equipment so as to transmit the charging signal to the electronic equipment;
the first detection pin is used for connecting the electronic equipment;
the detection circuit is connected with the first detection pin and used for outputting a preset signal according to the on-off state between the first detection pin and the electronic equipment;
and the switching circuit is respectively connected with the detection circuit, the conversion circuit and the first charging pin and is used for receiving the preset signal and controlling the on-off of a transmission path of the charging signal according to the preset signal.
2. The charging circuit of claim 1, wherein the switching circuit is configured with a control terminal, and wherein the detection circuit comprises:
the first end of the pull-up resistor is connected with the output end of the conversion circuit, the second end of the pull-up resistor is respectively connected with the control end of the switch circuit and the first detection pin, the pull-up resistor is used for outputting a high level signal by the second end when the first detection pin is disconnected with the electronic device, and the high level signal is used for controlling the switch circuit to be disconnected.
3. The charging circuit of claim 2, wherein the switching circuit comprises:
a first end of the switch is connected with the conversion circuit, and a second end of the switch is connected with the first charging pin;
and the voltage comparison circuit is respectively connected with the detection circuit and the switch and is used for receiving the preset signal and controlling the switch to be switched off when the voltage of the preset signal is greater than the threshold voltage.
4. The charging circuit of claim 1, wherein the switching circuit is configured with a control terminal, and wherein the detection circuit comprises:
the detection line is used for outputting a suspension signal from the second end when the first detection pin is disconnected with the electronic equipment, and the suspension signal is used for controlling the switch circuit to be disconnected.
5. The charging circuit according to any one of claims 1 to 4, further comprising:
the first grounding pin is used for being connected with the electronic equipment so as to transmit a grounding signal to the electronic equipment.
6. A charging device, characterized in that it comprises a charging circuit according to any one of claims 1 to 5.
7. The charging apparatus according to claim 6, further comprising:
the data transmission pins are used for being connected with the electronic equipment so as to transmit data signals to the electronic equipment.
8. The charging apparatus according to claim 7, further comprising:
a housing for housing the conversion circuit, the detection circuit and the switch circuit;
the first charging pin and the data transmission pin are partially exposed outside the shell and are arranged on the same straight line.
9. The charging device of claim 8, wherein the first sensing pin is partially exposed outside the housing, and a length of the first sensing pin exposed outside the housing is longer than a length of the first charging pin exposed outside the housing.
10. An electrical charging system, comprising:
the charging device of any one of claims 6 to 9;
an electronic device, the electronic device comprising:
the second charging pin is connected with the first charging pin and used for receiving the charging signal;
the second detection pin is connected with the first detection pin;
and the pull-down resistor is respectively connected with the second detection pin and the grounding terminal, and is used for pulling down the first detection pin to a low level voltage when the second detection pin is conducted with the first detection pin so as to output a preset signal to the switch circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022557586.5U CN213661246U (en) | 2020-11-06 | 2020-11-06 | Charging circuit, charging equipment and charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022557586.5U CN213661246U (en) | 2020-11-06 | 2020-11-06 | Charging circuit, charging equipment and charging system |
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| CN213661246U true CN213661246U (en) | 2021-07-09 |
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| CN202022557586.5U Active CN213661246U (en) | 2020-11-06 | 2020-11-06 | Charging circuit, charging equipment and charging system |
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