Switching power source device, switching power source...

Details Switching power source device, switching power source... Switching power source device, switching power source...

2009-08-18

2010-12-28

Riley, Shawn (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S017000, C363S127000

Reexamination Certificate

active

07859860

ABSTRACT:
A switching power source device for supplying power to a load includes a series resonant circuit, a plurality of main switch elements or main switch element groups for switching a current path of the series resonant circuit, a transformer for inducing a secondary current from the series resonant circuit, a plurality of synchronous rectification switch elements for rectifying the secondary current, a maximum on width control circuit for ordering a start and a completion of a maximum on width to the synchronous rectification switch element in synchronization with a timing of turning on the main switch elements or the main switch element groups, and a synchronous control circuit. The circuit controls an on period of the synchronous rectification switch element so as to turn on the synchronous rectification switch element in synchronization with a particular timing, and turn off in synchronization with another timing.

REFERENCES:
patent: 6301128 (2001-10-01), Jang et al.
patent: 7184280 (2007-02-01), Sun et al.
patent: 7796404 (2010-09-01), Reddy
patent: 2005/0122753 (2005-06-01), Soldano
patent: 2008/0055942 (2008-03-01), Tao et al.
patent: 2002-369516 (2002-12-01), None
patent: 2005-198375 (2005-07-01), None
patent: 2005-198438 (2005-07-01), None

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