Fault control circuit for switched power supply

Details Fault control circuit for switched power supply Fault control circuit for switched power supply

1996-11-15

1998-08-18

Berhane, Adolf

Electric power conversion systems

Current conversion

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

363 56, H02M 3335, H02H 7122

Patent

active

057965960

ABSTRACT:
A voltage source, a transformer and a switching controller are coupled for switched mode generation of a regulated output supply voltage. A switching circuit responsive to an on/off signal turns the power supply on and off by establishing a conductive condition in a conductive path. A fault detector establishes a non-conductive condition in a part of the conduction path responsive to an overload condition. A delay circuit establishes a conductive condition in an auxiliary conduction path for a period of time after the power supply is turned on. The auxiliary conduction path becomes non-conductive when the fault detector establishes a conductive condition in the part of the conduction path. The part of the conduction path remains conductive absent an overload condition. A latch arrangement including the delay circuit maintains the non-conductive condition in the auxiliary conduction path until the power supply is turned off.

REFERENCES:
patent: 4177389 (1979-12-01), Schott
patent: 4323961 (1982-04-01), Josephson
patent: 4546423 (1985-10-01), Seki
patent: 4586120 (1986-04-01), Malik et al.
patent: 4736264 (1988-04-01), Segger
patent: 4914560 (1990-04-01), Oh et al.
patent: 5055703 (1991-10-01), Schornack
patent: 5122726 (1992-06-01), Elliott et al.
patent: 5222009 (1993-06-01), Scharnick et al.
patent: 5642247 (1997-06-01), Giordano

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