Temperature compensated foldback current limiting

Details Temperature compensated foldback current limiting Temperature compensated foldback current limiting

1988-03-23

1990-04-03

Mis, David

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

307540, 307562, H03K 508

Patent

active

049143573

ABSTRACT:
A current-limiting circuit providing a foldback limiting action which is compensated for the temperature coefficient of the sensing resistor. Temperature compensation and voltage-related signals are combined with a multiplier circuit providing a multiplier output which is compared to the voltage developed across the sense resistor to produce a current control or current limiting indicating signal. One embodiment of the present invention is implemented in a monolithic integrated circuit including an aluminum sense resistor, and the temperature compensation selected to substantially eliminate the effects of the temperature coefficient of the aluminum sense resistor, resulting in a more stable foldback current limiting characteristic over an extended temperature range.

REFERENCES:
patent: 3947751 (1976-03-01), Bray
patent: 4533845 (1985-05-01), Bynum
patent: 4727269 (1988-02-01), Luich

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