Power adapter and power supply system using the same

Details Power adapter and power supply system using the same Power adapter and power supply system using the same

2007-03-26

2008-10-21

Han, Jessica (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C323S267000, C363S081000

Reexamination Certificate

active

07440294

ABSTRACT:
The present invention is associated with a power adapter capable of simultaneously providing a low-level DC voltage and a high-level DC voltage. The power adapter includes a transformer having a primary winding for storing energy when a main switch coupled therewith is turned on and transferring the stored energy to the secondary side of the transformer when the main switch is turned off. The transformer includes a first secondary winding and a second secondary winding connected in series with each other. A first rectifier/filter circuit is connected across the first secondary winding for generating a low-level DC voltage by rectifying and filtering the energy received by the first secondary winding, and a second rectifier/filter circuit is connected across the first secondary winding and the second secondary winding for generating a high-level DC voltage by rectifying and filtering the energy received by the first secondary winding and the second secondary winding.

REFERENCES:
patent: 6026000 (2000-02-01), Buijs et al.
patent: 6459595 (2002-10-01), Assow

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