Quasi-resonant fly-back converter without auxiliary winding

Details Quasi-resonant fly-back converter without auxiliary winding Quasi-resonant fly-back converter without auxiliary winding

2011-03-01

2011-03-01

Vu, Bao Q (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S021180

Reexamination Certificate

active

07898823

ABSTRACT:
Disclosed is a switching converter without an auxiliary winding. The switching converter has a transformer, a switching transistor, a coupling circuit and a regulating circuit. The transformer has a primary winding and a secondary winding, and is for transforming an input voltage into an output voltage; a first end of the switching transistor is coupled to the primary winding of the transformer, and the switching transistor is for controlling an operation of the transformer according to a control signal; the coupling circuit is for coupling a signal at the first end of the switching transistor to generate a coupled signal; and the regulating circuit is for detecting the coupled signal to generate the control signal according to the detecting result.

REFERENCES:
patent: 5729443 (1998-03-01), Pavlin
patent: 6469484 (2002-10-01), L'Hermite et al.
patent: 6587361 (2003-07-01), Preller
Adragna, Application Note AN1326, Feb. 2001, ST Microelectronics, pp. 1-28.

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