Fan control circuit with temperature compensation and method of controlling fan

A fan control circuit with temperature compensation, comprising:

• an on-off unit coupled to a fan, and the on-off unit configured to receive a load signal corresponding to a loading of a load, and
• a speed adjustment unit coupled to the fan, and the speed adjustment unit configured to receive the load signal and a temperature signal corresponding to a temperature of the load,
• wherein the on-off unit is configured to set an adjustable start threshold, and determine that the loading is greater than or equal to the adjustable start threshold according to the load signal to control the fan entering a working mode;
• in the working mode and when the on-off unit determines that the loading is less than a speed-adjusting threshold, the on-off unit controls the fan entering a fixed-speed mode and maintains a speed value of the fan at a first fixed speed;
• when the speed adjustment unit determines that the loading is greater than or equal to the speed-adjusting threshold, the speed adjustment unit controls the fan entering a speed-adjusting mode, and the speed adjustment unit adjusts the speed value according to the loading;
• the speed adjustment unit generates a speed displacement according to the temperature signal, and provides the speed displacement to compensate the speed value when the fan enters the working mode.