Drive circuit for switching device

Details Drive circuit for switching device Drive circuit for switching device

2006-10-24

2006-10-24

Nguyen, Chau N. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

Reexamination Certificate

active

07126802

ABSTRACT:
A drive circuit21that controls a switching device23ON/OFF and a soft cutoff command circuit that gradually decreases the gate terminal voltage of the switching device23when short circuit of the switching device23is detected. Additionally, an ON-pulse retention command circuit11retains the output of the drive circuit21ON when the gate terminal voltage is judged to have exceeded a specified value by a gate voltage judgment comparator16that detects the gate terminal voltage of the switching device23.

REFERENCES:
patent: 6057728 (2000-05-01), Igarashi
patent: 6580627 (2003-06-01), Toshio
patent: 02-262826 (1990-10-01), None
patent: 04-079758 (1992-03-01), None
patent: 2003-169715 (2003-06-01), None

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