Switching power supply

Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter

Reexamination Certificate

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Details

C363S071000, C363S095000

Reexamination Certificate

active

06917527

ABSTRACT:
A low-cost, easily-miniaturized switching power supply restrains voltage stress on first and second main switches. The switching power supply has small loss and low noise, enables setting of duty factors over a broad range, and has reduced thickness. The first main switch has one end connected with a negative electrode of an input voltage, and the second main switch has one end connected with a positive electrode of the input voltage. A first magnetic element is connected to the first main switch, and a second magnetic element is connected to the second main switch and the first magnetic element. The switching power supply has: a first diode connected to the first main switch, the first magnetic element, and the second magnetic element; a second diode connected to the first diode, the second main switch, and the second magnetic element; and an auxiliary switch between the diodes.

REFERENCES:
patent: 3046495 (1962-07-01), Faries et al.
patent: 3056094 (1962-09-01), Crawford
patent: 4685039 (1987-08-01), Inou et al.
patent: 5351175 (1994-09-01), Blankenship
patent: 5946206 (1999-08-01), Shimizu et al.
patent: 6674654 (2004-01-01), Winick et al.
patent: 2002/0136029 (2002-09-01), Ledenev et al.
patent: 6-5390 (1994-01-01), None
patent: 2591056 (1998-12-01), None

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