MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
发明人:
Nagasaka Keiji,Sato Hidetaka
申请号：
US201414910195
公开号：
US9923364(B2)
申请日:
2014.09.01
申请国别(地区):
美国
年份:
2018
代理人:
Birch, Stewart, Kolasch & Birch, LLP
摘要：
The purpose of the present invention is to improve responsiveness to short-circuit detection and rapidly cut off power supply to a load when a short circuit occurs. When a short circuit occurs, voltage exceeding the reference voltage of a comparison circuit is inputted as an input signal from a voltage output circuit, and a high signal is outputted from the comparison circuit. An FET is turned on by the output of the comparison circuit changing to the high signal. Consequently, an electric charge stored between the gate and emitter of an IGBT is discharged through a resistor, gate voltage decreases, and thereby the IGBT is turned off. The high signal of the comparison signal is held for a predetermined period by a holding circuit, and the IGBT is maintained in the off state over this period.
