Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Patent
1989-04-12
1990-11-13
Wong, Peter S.
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
323272, 323282, G05F 1613
Patent
active
049704516
ABSTRACT:
A DC to DC step-up converter is provided which employs high efficiency switching components such as MOSFET switching components in a main converter and provides a low power auxiliary converter to obtain the start up voltage required for operating the low resistance component of the main converter. A control circuit is provided which utilizes either the start up voltage from the auxiliary converter or a feedback voltage from the main converter output to provide control input to the low resistance switching devices which inputs are operative to maintain the output voltage at a desired level.
REFERENCES:
patent: 4085358 (1978-04-01), Holcomb
patent: 4121115 (1978-10-01), de Mere
patent: 4156273 (1979-05-01), Sato
patent: 4825144 (1989-04-01), Alberkrack et al.
Gerald Grady, Maxim Integrated Products, Sunnyvale, Calif., Design Ideas, "Step-Up Converter Produces 5V from 1.5V", EDN, Nov. 12, 1987, p. 146.
Maxim data sheet, MAX644/645 Highlights, p. 71.
Insinooritoimisto Pentti Tamminen Ky
Wong Peter S.
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