Charging circuit and charging cable
AssigneeVivo Mobile Communication Co., Ltd.
InventorPengfei Guo
Life of this patent
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Abstract
A charging circuit and a charging cable. The charging circuit includes a first interface, a second interface, a detection control module, and a switch module. The first interface outputs a high-level signal through a first signal pin in a case of detecting that the first interface is plugged with a charger compatible with a fast charging protocol; and the detection control module controls the switch module to perform a preset operation in a case of detecting the high-level signal, so that the first signal pin and a second signal pin are connected, and ground and a bus are disconnected.
Claims18
A charging circuit, comprising a first interface, a second interface, a detection control module, and a switch module, wherein the first interface comprises a first signal pin, the second interface comprises a second signal pin, the detection control module and the switch module are sequentially connected in series between the first signal pin and the second signal pin, and the switch module is further connected in series between ground and a bus that is connected between the first interface and the second interface;
- the first interface is configured to output a high-level signal through the first signal pin in a case of detecting that the first interface is plugged with a charger compatible with a fast charging protocol;
- and
- the detection control module is configured to control the switch module to perform a preset operation in a case of detecting the high-level signal, so that the first signal pin and the second signal pin are connected, and the ground and the bus are disconnected;
- wherein the detection control module comprises a comparator and an inverter, wherein an inverting input end of the comparator is separately electrically connected to the first signal pin and a first end of the switch module, an output end of the comparator is separately connected to an input end of the inverter and a second end of the switch module, an output end of the inverter is connected to a third end of the switch module, and a non-inverting input end of the comparator is connected to a reference voltage input end;
- in a case that the inverting input end of the comparator detects that the first signal pin outputs the high-level signal, the output end of the comparator outputs a low-level signal to the input end of the inverter, the first end of the switch module, and the second end of the switch module;
- and
- the switch module is configured to perform a preset operation according to the low-level signal input to the first end and the second end, and the high-level signal input to the third end, so that the first signal pin and the second signal pin are connected, and the ground and the bus are disconnected.
A charging cable, comprising a charging circuit, wherein charging circuit comprises a first interface, a second interface, a detection control module, and a switch module, wherein the first interface comprises a first signal pin, the second interface comprises a second signal pin, the detection control module and the switch module are sequentially connected in series between the first signal pin and the second signal pin, and the switch module is further connected in series between ground and a bus that is connected between the first interface and the second interface;
- the first interface is configured to output a high-level signal through the first signal pin in a case of detecting that the first interface is plugged with a charger compatible with a fast charging protocol;
- and
- the detection control module is configured to control the switch module to perform a preset operation in a case of detecting the high-level signal, so that the first signal pin and the second signal pin are connected, and the ground and the bus are disconnected;
- wherein the detection control module comprises a comparator and an inverter, wherein an inverting input end of the comparator is separately electrically connected to the first signal pin and a first end of the switch module, an output end of the comparator is separately connected to an input end of the inverter and a second end of the switch module, an output end of the inverter is connected to a third end of the switch module, and a non-inverting input end of the comparator is connected to a reference voltage input end;
- in a case that the inverting input end of the comparator detects that the first signal pin outputs the high-level signal, the output end of the comparator outputs a low-level signal to the input end of the inverter, the first end of the switch module, and the second end of the switch module;
- and
- the switch module is configured to perform a preset operation according to the low-level signal input to the first end and the second end, and the high-level signal input to the third end, so that the first signal pin and the second signal pin are connected, and the ground and the bus are disconnected.
Dependencies are inferred from the claim text.