Buck-boost PFC converters

Details Buck-boost PFC converters Buck-boost PFC converters

2011-02-01

2011-02-01

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S022000, C323S271000, C323S282000

Reexamination Certificate

active

07881076

ABSTRACT:
A buck-boost PFC converter is provided and includes an inductor, first and second transistors, a first diode, and a control circuit. The inductor has a first terminal and a second terminal. The first transistor is coupled to a positive-power rail and the first terminal of the inductor. The second transistor is coupled to the second terminal of the inductor and a negative-power rail. The first diode is connected from the second terminal of the inductor to an output of the buck-boost PFC converter. The control circuit generates a first signal and a second signal coupled to control the first transistor and the second transistor respectively. The first signal is utilized to turn on the first transistor for conducting the positive-power rail to the inductor. The second signal is utilized to turn on the second transistor for conducting the inductor to the negative-power rail.

REFERENCES:
patent: 6903914 (2005-06-01), Moussaoui
patent: 7116090 (2006-10-01), Yang et al.
patent: 7218081 (2007-05-01), Jang et al.
patent: 7460380 (2008-12-01), Yang
patent: 2002/0089860 (2002-07-01), Kashima et al.

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