Direct current to direct current converter

Details Direct current to direct current converter Direct current to direct current converter

2008-02-12

2010-12-07

Vu, Bao Q (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S021160

Reexamination Certificate

active

07848119

ABSTRACT:
An exemplary DC to DC converter (2) includes a transistor (29), a first rectifying and filtering circuit (21), a pulse generating circuit (27) and a transformer (25). The first rectifying and filtering circuit transforms an external AC voltage to a first DC voltage. The transformer includes a primary winding (251), an assistant winding (252) connected with the primary winding in a flyback mode, and a secondary winding (253). The first DC voltage is connected to ground via the primary winding, the transistor in series. The pulse generating circuit includes a controlling terminal, a diode, a resistor, and a capacitor. One terminal of the assistant winding is connected to ground, and the other terminal of the assistant winding is connected to an anode of the diode. A cathode of the diode is connected to ground via the resistor and the capacitor in series. The controlling terminal is connected to gate electrode of the transistor.

REFERENCES:
patent: 4988889 (1991-01-01), Oughton, Jr.
patent: 5138543 (1992-08-01), Harm
patent: 5675479 (1997-10-01), Tani et al.
patent: 6433443 (2002-08-01), Nishida et al.
patent: 2006/0256588 (2006-11-01), Chen

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