CONTROL METHOD OF OVER-TEMPERATURE PROTECTION, DRIVER CHIP AND CONTROL SYSTEM OF OVER-TEMPERATURE PROTECTION

摘要

A control method of over-temperature protection, a driver chip and a control system of over-temperature protection are disclosed. The control method includes the following steps: a driver chip provides an output voltage to drive a DC fan. A temperature of the driver chip is detected by an over-temperature detection module. When the temperature of the driver chip is higher than a first threshold value, the power supplying to the driver chip is stopped, so that the driver chip can cool down. After the temperature of the driver chip is lower than a second threshold value, the driver chip is restarted. A preset voltage is provided to the DC fan by the driver chip and the DC fan rotates at a preset rotational speed which is higher than the rotational speed.

主权项

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.