DC-DC converter with switchable capacitors

Details DC-DC converter with switchable capacitors DC-DC converter with switchable capacitors

2005-07-28

2008-12-23

Vu, Bao Q (Department: 2838)

Electric power conversion systems

Current conversion

With voltage multiplication means

C363S060000, C307S110000, C307S109000

Reexamination Certificate

active

07468898

ABSTRACT:
A step down DC-DC converter is reduced in the cost by reducing a number of capacitors included. The DC-DC converter is provided with switches that connect (n−1) capacitors in parallel with each other and switches that connect the capacitors in series with each other. In phase1,some switches are turned on to connect the capacitors in parallel between an output terminal and a ground voltage so that the capacitors are charged. In phase2,other switches are turned on to connect the capacitors in series between the output terminal and an input voltage so that the capacitors are discharged. A stepped down output voltage, that is 1
times of the input voltage, is obtained by alternating the phase1and the phase2until a stable state is reached.

REFERENCES:
patent: 4451743 (1984-05-01), Suzuki et al.
patent: 4531113 (1985-07-01), Abraham
patent: 5434569 (1995-07-01), Yung et al.
patent: 5581454 (1996-12-01), Collins
patent: 6198645 (2001-03-01), Kotowski et al.
patent: 6834001 (2004-12-01), Myono
patent: 6985024 (2006-01-01), Geen
patent: 09-163719 (1997-06-01), None
patent: 2003-111385 (2003-04-01), None

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