Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2011-03-22
2011-03-22
Berhane, Adolf (Department: 2838)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
C363S021160
Reexamination Certificate
active
07911815
ABSTRACT:
A primary-side feedback control device for a power converter includes a control unit for generating a pulse signal according to a feedback signal for controlling on and off states of a switching transistor of the power converter, a comparator coupled to an auxiliary winding of a primary side of the power converter for generating at least one control signal according to a voltage on the auxiliary winding and a reference voltage, a sample-and-hold unit coupled to the auxiliary winding, the comparator, and the control unit for generating the feedback signal according to the voltage on the auxiliary winding and the at least one control signal, and a voltage generator coupled to the control unit, the comparator, and the sample-and-hold unit for generating the reference voltage according to the feedback signal.
REFERENCES:
patent: 6091614 (2000-07-01), Malenfant
patent: 7349229 (2008-03-01), Yang
patent: 7679936 (2010-03-01), Huynh et al.
patent: 2009/0175057 (2009-07-01), Grande et al.
Hung Chia-Chieh
Lin Chin-Yen
Wang Yen-Hui
Wu Chi-Hao
Berhane Adolf
Grenergy Opto, Inc.
Hsu Winston
Margo Scott
Pham Emily
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