Patent ID: 8826056

Claim:
A circuit protection system for an electronic system, the circuit protection system comprising: a control unit; a platform control hub (PCH) connected to the control unit; a PCH power chip connected to the control unit and the PCH to power the PCH; a basic input output system (BIOS) connected to the control unit; and a power supply connected to the PCH; wherein the control unit determines the status of the potential of a PW_OK signal output from the PCH power chip, and gets the current state of the electronic system through the BIOS, thereby outputting an enable signal to disable the PCH power chip and outputting a system PW_OK signal to the PCH when the current status of the PW_OK signal of the PCH power chip does not correspond to a predetermined status for the PCH power chip defined in the current state of the electronic system, and the PCH outputs a PS_ON signal to the power supply to shut down the electronic system in response to receiving the system PW_OK signal.