Charger
AssigneeHuawei Technologies Co., Ltd.
InventorsWenchao Yu, Chong Wen
Life of this patent
Estimating the term…
Abstract
Some embodiments of the present invention provide a charger. According to the charger, a detection signal generation circuit actively sends a detection signal; a feedback circuit detects level signals on a sampling component, and generates a feedback signal according to the level signals; a switch component controls, according to the feedback signal, the charger to output a charging voltage; and when the level signals meet a preset condition (the preset condition is a preset condition that the level signals meet when an abnormal short circuit occurs on a charging interface), the switch component controls the charger to stop outputting the charging voltage.
Claims19
-14. (canceled)
A charger, comprising:
- a detection signal generation circuit;
- a sampling circuit;
- a feedback circuit;
- a first switch;
- a charging circuit;
- and
- a charging interface;
- wherein the charging interface comprises a plurality of data transmission pins and a power pin;
- wherein the charging circuit is configured to:
- receive a power input signal;
- and
- generate a charging voltage according to the power input signal, wherein the charging voltage is output through the power pin;
- wherein the detection signal generation circuit is configured to output a detection signal, wherein an output terminal of the detection signal generation circuit is connected to a first data transmission pin of the plurality of data transmission pins;
- wherein the sampling circuit is connected in series to an output cable of the detection signal generation circuit;
- wherein the feedback circuit is connected to the sampling circuit and the first switch, and the feedback circuit is configured to:
- detect level signals on two terminals of the sampling circuit;
- generate a feedback signal according to the level signals;
- and
- transfer the feedback signal to the first switch;
- and
- wherein the first switch is connected in series to a power input cable of the charging circuit, or the first switch is connected in series to a connection cable between the charging circuit and the power pin;
- wherein the first switch is configured to:
- receive the feedback signal;
- and
- control, according to the feedback signal, the charger to output the charging voltage;
- and
- wherein:
- when the level signals meet a preset condition, the feedback circuit is configured to generate a first feedback signal, and the first switch is configured to control, according to the first feedback signal, the charger to stop outputting the charging voltage;
- or
- when the level signals do not meet the preset condition, the feedback circuit is configured to generate a second feedback signal, and the first switch is configured to control, according to the second feedback signal, the charger to output the charging voltage.
Dependencies are inferred from the claim text.