MOTHERBOARD, FAN CONTROL DEVICE, AND FAN CONTROL CIRCUIT

摘要

A motherboard includes a fan and a fan control circuit. The fan control circuit includes a switch module and a voltage control circuit. A first terminal of the switch module is connected to a standby power terminal of the motherboard. A second terminal of the switch module is connected to a first power terminal of the motherboard and connected to a power terminal of the fan. An input terminal of the voltage control circuit is connected to a power state signal terminal of the motherboard. An output terminal of the voltage control circuit is connected to a control terminal of the switch module. When the motherboard is turned off, the voltage control circuit turns on the switch module for a predetermined time, to make the standby power terminal supply a working voltage for the fan to keep the fan rotating for the predetermined time.