Flyback converter with synchronous rectifier

Details Flyback converter with synchronous rectifier Flyback converter with synchronous rectifier

2007-04-24

2007-04-24

Sterrett, Jeffrey (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S021170

Reexamination Certificate

active

11019418

ABSTRACT:
Disclosed herein is a flyback converter with a synchronous rectifier which is applied to a power supply of a portable computer such as a notebook PC. The flyback converter is operated in a critical conduction mode to turn on/off a main switch at a zero crossing point of an output voltage. The flyback converter is also adapted to supply a driving voltage to a synchronous switch using the output voltage. Therefore, there is no need for a secondary auxiliary coil of a transformer and for a Schottky diode to be connected in parallel with the synchronous switch, resulting in simplification in circuit design.

REFERENCES:
patent: 4945465 (1990-07-01), Marinus et al.
patent: 6191965 (2001-02-01), Matsumoto
patent: 6353544 (2002-03-01), Lau
patent: 6462965 (2002-10-01), Uesono
patent: 6594161 (2003-07-01), Jansen et al.
patent: 6813166 (2004-11-01), Chang et al.
patent: 7012821 (2006-03-01), Park et al.
patent: 7123489 (2006-10-01), Park et al.

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