Switching power supply unit and voltage converting method

Details Switching power supply unit and voltage converting method Switching power supply unit and voltage converting method

2008-07-29

2008-07-29

Han, Jessica (Department: 2838)

Electric power conversion systems

Current conversion

Including automatic or integral protection means

C363S017000, C363S056050, C363S098000, C323S363000, C323S333000

Reexamination Certificate

active

11439960

ABSTRACT:
The present invention provides a switching power supply unit and a voltage converting method capable of suppressing a surge voltage applied to an output rectifier element more effectively. Energy in the direction of suppressing reverse voltages (surge voltages) applied to a plurality of rectifier diodes is injected into a rectifier circuit. Reverse voltages applied to the plurality of rectifier diodes are maintained to be lower than a voltage to be inherently applied for a predetermined period. Therefore, rise in the surge voltage is suppressed and rectifier elements (rectifier diodes) having low withstand voltage can be used.

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