| 摘要 |
PROBLEM TO BE SOLVED: To provide the control circuit of a semiconductor device with superheating protection function, which ca reduce possibility that the semiconductor device is destroyed. SOLUTION: The control circuit of the semiconductor device with superheating protection function has a control means 1 and an output state detection means 5 for controlling the semiconductor device with superheating protection function 3, which loads a semiconductor component 33 and superheating protection means 34 to 37 on a one chip. The control means 1 supplies a PWM control signal to the semiconductor component 33. The output state detection means 5 detects the output abnormal state of the semiconductor device with superheating protection function 3 in the superheating protection operation of the superheating protection means 34 to 37. The control means 1 monitors detection output from the output state detection means 5 at prescribed monitoring timing. When the prescribed number of detection outputs continuously occur for prescribed time, the supply of the PWM control signal to the semiconductor component 33 is controlled to be stopped. |
