Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2011-05-31
2011-05-31
Berhane, Adolf (Department: 2838)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
C363S056010, C363S097000
Reexamination Certificate
active
07952893
ABSTRACT:
An integrated control circuit for controlling a switching power supply, a switching power supply incorporating the same, and a method of controlling the switching power supply, where the control IC includes a current comparator that detects current flowing through a switching device, a flip-flop circuit that controls the ON-period of the switching device, an averaging circuit that converts the peak load current value to a time-average, a comparator that detects an overloaded state from the load current, a delay circuit that sets a time from detecting the overcurrent state to stopping the switching operation, a latch circuit that stops the switching operation for a period of time, a first reference voltage supply used in the current comparator, which has a higher voltage value than a second reference voltage supply used in the comparator.
REFERENCES:
patent: 5973942 (1999-10-01), Nelson et al.
patent: 7049879 (2006-05-01), Osamura et al.
patent: 7359225 (2008-04-01), Djenguerian et al.
patent: 7778049 (2010-08-01), Morota
patent: 11-215690 (1999-08-01), None
patent: 11-234892 (1999-08-01), None
Berhane Adolf
Fuji Electric Systems Co., Ltd.
Rabin & Berdo PC
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