Anpec Electronics Corporation

Chien-Sheng Wang

Kun-Min Chen

Ching-Feng Lai

Yin-Kai Chen

A heat dissipation system includes a control module, a first fan module and a second fan module. The first fan module is electrically connected to the control module to provide a speed signal to the control module. The second fan module is electrically connected to the control module and the first fan module. The control module provides at least one control signal to control the rotation of the first fan module and the second fan module respectively. The first fan module transmits a first trigger signal to the second fan module, and the second fan module starts to rotate or stops rotating together with the first fan module according to the first trigger signal.

Heat dissipation system and fan driving circuit

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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Taichung, Taiwan

Chien-Sheng Wang