Method and apparatus for selectable DC to DC conversion

Details Method and apparatus for selectable DC to DC conversion Method and apparatus for selectable DC to DC conversion

1995-07-19

1997-11-04

Sterrett, Jeffrey L.

Electric power conversion systems

Current conversion

With voltage multiplication means

363 60, H02M 307

Patent

active

056846827

ABSTRACT:
A method and apparatus for DC-DC conversion. The apparatus includes a voltage detector (152) for detecting a voltage level in the circuit; a capacitive voltage doubler configuration of the DC to DC conversion circuits (130); a capacitive voltage tripler configuration of the DC to DC conversion circuits (130); selector circuitry (134) responsive to the voltage detector (152) for enabling the doubler or tripler configurations; and a voltage regulator (132) for regulating the converted DC voltages. The selector circuitry (134) initially enables the doubler, and then disables the doubler and enables the tripler when the voltage level drops below a reference voltage. In an alternate embodiment, high load signal HLVBB is provided when a high power load is to be enabled, such that the selector circuitry (134) temporarily disables the doubler and temporarily enables the tripler until the high load signal is inactive.

REFERENCES:
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patent: 4961006 (1990-10-01), Pace et al.
patent: 5006974 (1991-04-01), Kazerounian et al.
patent: 5028861 (1991-07-01), Pace et al.
patent: 5132895 (1992-07-01), Kase
patent: 5339236 (1994-08-01), Tamagawa
patent: 5414614 (1995-05-01), Fette et al.
patent: 5563779 (1996-10-01), Cave et al.

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