Switch mode power supply

Details Switch mode power supply Switch mode power supply

2011-01-18

2011-01-18

Nguyen, Matthew V (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S021040

Reexamination Certificate

active

07872880

ABSTRACT:
A switch mode power supply according to the invention that can improve the reliability thereof includes a series circuit connected between the positive and negative electrodes of a DC power supply3, the series circuit including a capacitor4, a main switching device1, and a subsidiary switching device2; a main control circuit13; a subsidiary control circuit10; control circuits13and10turning main switching device1and subsidiary switching device2alternately ON and OFF to obtain a DC output via a transformer6; and subsidiary control circuit10preventing a voltage exceeding the gate breakdown voltage of subsidiary switching device2from being applied to the gate electrode of subsidiary switching device2.

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