Patent ID: 8780509

Claim:
A circuit protection device, which is applied to a power supply module, comprising: a judgment module comprising a comparing unit, a feedback unit and a reset unit, wherein the comparing unit has an output terminal, a first input terminal and a second input terminal, the feedback unit is electrically connected to the output terminal and the first input terminal, and the reset unit is electrically connected to the feedback unit and the first input terminal; and a control module electrically connected to the comparing unit and the reset unit of the judgment module; wherein, the comparing unit receives a first reference signal representing the output current of the power supply module and a second reference signal representing the output voltage of the power supply module, and outputs a judgment signal to the control module, wherein the circuit protection device is enabled based on detecting the relationship between the output current and output voltage of the power supply module, and a threshold for enabling the circuit protection device is a variable value.