Switching power supply circuit and electronic device

Details Switching power supply circuit and electronic device Switching power supply circuit and electronic device

2005-09-20

2005-09-20

Sterrett, Jeffrey (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C363S056090, C363S097000

Reexamination Certificate

active

06947296

ABSTRACT:
A surge voltage detection circuit compares a stipulated voltage VSwith the drain voltage of a switching element, the drain voltage being applied by a smoothing capacitor. The comparison result is supplied to a switching control circuit. If the drain voltage of the switching element is higher than the stipulated voltage VS, the switching control circuit inhibits the operation of the switching element. As a result, no switching operation is started, and the drain voltage of the switching element does not exceed the breakdown voltage of the element.

REFERENCES:
patent: 6341075 (2002-01-01), Yasumura
patent: 6366476 (2002-04-01), Yasumura
patent: 6542387 (2003-04-01), Tsuge
patent: 3-3134 (1991-01-01), None
patent: 8-182315 (1996-07-01), None
patent: 2001-298860 (2001-10-01), None
patent: 2002-51551 (2002-02-01), None

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