DC voltage conversion circuit

Details DC voltage conversion circuit DC voltage conversion circuit

2006-07-11

2006-07-11

Patel, Rajnikant B. (Department: 2838)

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

C363S041000, C315S276000

Reexamination Certificate

active

07075806

ABSTRACT:
In a fly-back DC voltage conversion circuit, a transformer accumulates energy during the on-state of a switching element, and the accumulated energy is outputted from a secondary winding during the off-state of the switching element. The switching element is placed in the on-state when the accumulated energy is completely outputted from the secondary winding. A voltage applied to the switching element is differentiated by a capacitor to detect a discharge termination point at which the current of the transformer becomes zero to change a switching frequency of the switching element. The DC voltage conversion circuit can attain control in a current boundary state without significantly increasing cost.

REFERENCES:
patent: 6198638 (2001-03-01), Lee
patent: 08-195290 (1996-07-01), None
patent: 8-195290 (1996-07-01), None
patent: 2002-374672 (2002-12-01), None
patent: WO 03/036782 (2003-05-01), None

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