Power supply apparatus

Details Power supply apparatus Power supply apparatus

2006-11-07

2009-06-09

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S271000, C323S351000, C323S290000

Reexamination Certificate

active

07545133

ABSTRACT:
In a power supply apparatus in which a source of a MOSFET is connected to a node of a rectifier diode and a choke coil through a resonance coil, a series circuit including a capacitor and a MOSFET is connected to a series circuit including the resonance coil and the rectifier diode, and the MOSFET and the MOSFET are driven by PWM control so that the MOSFET and the MOSFET are alternately turned on with a period in which both MOSFETs are turned off, a resistor is connected in parallel with the capacitor, and optionally another diode is connected in series with the resistor.

REFERENCES:
patent: 3617860 (1971-11-01), Williams et al.
patent: 5691632 (1997-11-01), Otake
patent: 5793190 (1998-08-01), Sahlstrom et al.
patent: 6710582 (2004-03-01), Watanabe
patent: 7307407 (2007-12-01), Nishi et al.
Written Opinion.
International Search Report issued Jan. 24, 2006.
Office Action issued Mar. 28, 2008 in corresponding Chinese Application No. 200580015566.0 with English Language Translation.

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