Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Reexamination Certificate
2011-03-29
2011-03-29
Han, Jessica (Department: 2838)
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
C323S249000, C323S259000, C323S290000
Reexamination Certificate
active
07915872
ABSTRACT:
A switching power converter includes an input terminal for receiving an input voltage, an output terminal for supplying an output voltage, a coupled choke having a main winding and an auxiliary winding, an output capacitor coupled to the output terminal, a main diode coupled between the auxiliary winding and the output terminal, and a switch having first and second positions. The main and auxiliary windings are connected to be charged by an input voltage when the input voltage is coupled to the input terminal and the switch is in the first position. The auxiliary winding is connected to reverse bias the main diode when the switch is switched from the first position to the second position to thereby suppress reverse recovery current in the main diode. The power converter may further include an auxiliary diode coupled between a common node of the main and auxiliary windings and the output terminal, as well as an inductor in series with the auxiliary diode.
REFERENCES:
patent: 5321348 (1994-06-01), Vinciarelli et al.
patent: 5543704 (1996-08-01), Thoren
patent: 5815386 (1998-09-01), Gordon
patent: 6201714 (2001-03-01), Liang
patent: 6377481 (2002-04-01), Mantov
patent: 7579814 (2009-08-01), Orr
patent: 2006/0012348 (2006-01-01), Zhao et al.
Astec International Limited
Han Jessica
Harness & Dickey & Pierce P.L.C.
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