Method and apparatus for improving the light load efficiency...

Details Method and apparatus for improving the light load efficiency... Method and apparatus for improving the light load efficiency...

2008-06-10

2011-10-04

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

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

Reexamination Certificate

active

08031493

ABSTRACT:
A method and apparatus are provided for a switching mode converter to improve the light load efficiency thereof. The converter is thus operated with three modes by monitoring a feedback signal and a supply voltage. When the feedback signal indicates that loading gets light enough, the converter is switched from the first mode to the second mode, and during the second mode some cycles are skipped. If loading is too light, the converter is switched from the second mode to the third mode, and during the third mode more cycles will be skipped.

REFERENCES:
patent: 6057607 (2000-05-01), Rader et al.
patent: 6657417 (2003-12-01), Hwang
patent: 7035119 (2006-04-01), Koike
patent: 7391631 (2008-06-01), Shimada

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