Capacitor DC-DC converter with PFM and gain hopping

Details Capacitor DC-DC converter with PFM and gain hopping Capacitor DC-DC converter with PFM and gain hopping

1999-05-28

2000-04-25

Berhane, Adolf Deneke

Electric power conversion systems

Current conversion

With voltage multiplication means

307110, H02M 318

Patent

active

060551682

ABSTRACT:
A structure and method are provided for converting unregulated DC voltages to regulated DC voltages using pulse frequency modulation (PFM) and a switched capacitor array capable of multiple gains, where gain selection is based on the output voltage. The selected gain is maintained at or above a minimum gain determined from the input voltage. A regulated voltage, which is equal to or greater than a desired output voltage, is thus available to the load over a wider range of inputs and with greater conversion efficiency.

REFERENCES:
patent: 5134401 (1992-07-01), McCartney
patent: 5289059 (1994-02-01), Pikkarainen
patent: 5359276 (1994-10-01), Mammano
Data Sheet for Maxim MAX619 DC-DC Converter, Feb. 1994, p. 4-39 to 4-45.
Data Sheet for Linear Technology LTC1516 DC/DC Converter, 1996, 8 pages.

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