Patent ID: 9667143
Date: 2017-05-30
CPC Classifications: H02H,H02M

Claim:
1. A power conversion circuit comprising: an input port configured to electrically connect to a power source and to obtain a power voltage from the power source; an output port configured to electrically connect to a function module; a power conversion chip comprising a voltage input pin and a voltage output pin, wherein, the voltage input pin is electrically connected to the input port and receives the power voltage obtained by the input port, and the voltage output pin is electrically connected to the output port, the power conversion chip is configured to convert the power voltage received by the voltage input pin to an output voltage, and output the output voltage to the output port via the voltage output pin, thus to provide the output voltage to the function module via the output port; a path switch comprising a control terminal, a first path terminal, and a second path terminal, the first path terminal being connected to the input port, and the second path terminal being connected to the voltage input pin of the power conversion chip; and a protection module connected between the control terminal and the output port, and configured to detect the output voltage on the output port, and produce an off control signal to the control terminal of the path switch to turn off the path switch when the output voltage is greater than a predetermined voltage.