| 摘要 |
PROBLEM TO BE SOLVED: To cool an object to be cooled while removing dust by a fan.SOLUTION: A motor drive circuit includes an output transistor supplying a drive current to a drive coil of a motor rotating the fan for cooling the object to be cooled by sending air, a switching control circuit for performing switching control of the output transistor so that the motor rotates in a first direction for cooling the object to be cooled or a second direction opposite to the first direction, and a switching circuit for allowing the switching control circuit to stop rotation in the first direction and then to start switching control so that the motor rotates in the second direction when a first time passes after the motor starts rotating in the first direction, and for allowing the switching control circuit to stop rotation in the second direction and then to start switching control so that the motor rotates in the first direction when a second time passes after the motor starts rotating in the second direction. |
