Anpec Electronics Corporation

Yin-Kai Chen

Ching-Feng Lai

Kun-Min Chen

Chia-Tai Yang

Chien-Sheng Wang

A fan control circuit for controlling a fan includes a processing module, a driving module and a speed compensation module. The driving module is electrically connected to the processing module, and generates at least one driving signal to drive the fan. The speed compensation module is electrically connected to the processing module, and receives a first voltage. The first voltage is variable. The speed compensation module generates and transmits a speed-compensation parameter to the processing module according to the first voltage and a first waveform, and the processing module adjusts the driving signal according to the speed-compensation parameter.

Fan control circuit and fan control method

A fan control system includes a control module, a first fan module and a second fan module. The control module provides a first control signal to the first fan module to adjust the rotation state of the first fan module. The first fan module provides a second control signal to the second fan module based on the first control signal to adjust the second fan module. The first fan module includes a first terminal and a second terminal. The second fan module includes a first terminal and a second terminal. The first terminal of the first fan module is electrically connected to the control module to receive the first control signal. The second terminal of the first fan module is electrically connected to the first terminal of the second fan module. The second terminal of the second fan module is electrically connected to a reference voltage.

Fan control system

A heat dissipation system at lease has a first fan module including a first fan and a first fan driving circuit. The first fan driving circuit generates a fan driving signal to drive the first fan. When a control module transmits a stopping signal to the first fan module, the first fan driving circuit decreases a duty cycle of the fan driving signal driving the first fan according to the stopping signal. When the duty cycle of the fan driving signal driving the first fan is less than or equal to a first predetermined duty cycle, within a first working time, the first fan driving circuit decreases the duty cycle of the fan driving signal driving the first fan to zero by subtracting one predetermined duty interval from the duty cycle of the fan driving signal driving the first fan every predetermined working time interval.

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Hsinchu, Taiwan

Yin-Kai Chen