Switching mode power supply and method for outputting...

Electric power conversion systems – Current conversion – With cooling means

Reexamination Certificate

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Details

C363S020000, C363S039000, C363S056110

Reexamination Certificate

active

11371014

ABSTRACT:
A switching mode power supply and a method for outputting voltage therefrom are provided, where a transformer receives rectified alternating current (AC) voltage and transforms a voltage value or a current value, a switching transistor is connected to one end of a first coil and controls a level of power supplied to the first coil, a heat sink is positioned adjacent to the switching transistor and attenuates electromagnetic wave noise of the switching transistor; and a capacitive device is set up in an electric power line connecting the heat sink to a first side grounding end coupled with the other end of the first coil of the transformer. Accordingly the switching mode power supply can be miniaturized while effectively attenuating the electromagnetic wave noise from the switching transistor.

REFERENCES:
patent: 5646498 (1997-07-01), Lipo et al.
patent: 5659461 (1997-08-01), Inou et al.
patent: 2005/0184372 (2005-08-01), Asahi et al.
patent: 2000-295836 (1997-03-01), None
patent: 2000-014135 (2000-01-01), None
patent: 2001-211647 (2001-08-01), None
patent: 20-0137587 (1998-11-01), None

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