Patent ID: 9712104
Date: 2017-07-18
CPC Classifications: H02P

Claim:
1. A control method of over-temperature protection, the control method being adapted to a driver chip for driving a DC fan, and comprising the following steps: a. providing an output voltage to the DC fan by the driver chip so as to drive the DC fan to rotate at a rotational speed; b. detecting whether a temperature of the driver chip is higher than a first threshold value, by an over-temperature detection module; c. stopping supplying power to the driver chip when the temperature of the driver chip is higher than the first threshold value, so as to cool down the driver chip; d. restarting the driver chip when the temperature of the driver chip is lower than a second threshold value; and e. providing a preset voltage to the DC fan by the driver chip, so as to drive the DC fan to rotate at a preset rotational speed which is higher than the rotational speed.