Synchronous rectification circuit having burst mode...

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

Reexamination Certificate

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C363S021140

Reexamination Certificate

active

08031489

ABSTRACT:
The configuration of a synchronous rectification circuit and a controlling method thereof are provided. The proposed circuit includes a converter including a first switch and a first synchronous rectifier, and a burst mode controller including a logic process module performing one of functions of delaying one of a non-integer and at least one operating periods to generate a synchronous rectification driving signal of the first synchronous rectifier counting from a beginning of a first pulse of a driving signal of the first switch during a working time of a burst period, and turning off the synchronous rectification driving signal of the first synchronous rectifier by one of the non-integer operating period and the at least one operating period ahead of an ending of a last operating period of the driving signal of the first switch during the working time of the burst period.

REFERENCES:
patent: 2008/0137379 (2008-06-01), Mao
patent: 2009/0016083 (2009-01-01), Soldano et al.
patent: 2009/0086512 (2009-04-01), Fahlenkamp et al.
patent: 2009/0213623 (2009-08-01), Yang

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