Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2005-03-22
2005-03-22
Berhane, Adolf (Department: 2838)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
C363S089000
Reexamination Certificate
active
06870747
ABSTRACT:
A controller for a switching power supply having first and second synchronous rectifiers that minimizes the reverse recovery time and body diode conduction losses of each of the synchronous rectifiers. The controller includes a first controller that predicts the optimal turn-on and turn-off time of the first synchronous rectifier as a function of voltage measurements of the previous switching cycle and the timing of the pulse width modulator signal in the current switching cycle. The controller also includes a second controller that predicts the optimal turn-on and turn-off time of the second synchronous rectifier as a function of voltage measurements of the previous switching cycle and the timing of the pulse width modulator signal in the current switching cycle.
REFERENCES:
patent: 6049471 (2000-04-01), Korcharz et al.
patent: 6535400 (2003-03-01), Bridge
patent: 20020001204 (2002-01-01), Lentini et al.
patent: 1 148 624 (2001-10-01), None
Librizzi, F. et al., “STSRx Family: Mixed-Signal Ics to Drive Synchronous Rectifiers in Isolated SMPSs,” AN1288 Application Note, Jul. 2000.
Berhane Adolf
Brady W. James
Swayze, Jr. W. Daniel
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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