OPENING AND CLOSING OBJECT DRIVE CONTROLLER AND OPENING AND CLOSING OBJECT DRIVE CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To suppress heat and noise from a semiconductor device in PWM control and to reduce the size of an apparatus.

SOLUTION: A temperature sensor 30 detects temperatures of the semiconductor device 3. When a temperature of the semiconductor device 3 is a predetermined threshold or less, a microcomputer 10 drives the semiconductor device 3 with a trapezoid wave having decreased pulse rise slew rate and pulse fall slew rate. On the other hand, when a temperature of the semiconductor device 3 reaches the predetermined threshold, a driver 20 is controlled so as to drive the semiconductor device 3 with a square wave having increased pulse rise slew rate and pulse fall slew rate.

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