High efficiency power supply for LED lighting applications

Details High efficiency power supply for LED lighting applications High efficiency power supply for LED lighting applications

2007-09-04

2007-09-04

Dinh, Trinh (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S224000

Reexamination Certificate

active

11450232

ABSTRACT:
A power supply for plural loads coupled in parallel comprises a voltage regulator, a plurality of current regulators, and an error control circuit. The voltage regulator provides a common output voltage to the plural loads. The voltage regulator comprises a sensor circuit providing a voltage sense signal corresponding to the output voltage, which provides feedback to regulate the output voltage at a selected level. The plurality of current regulators are coupled to respective ones of the plural loads. Each of the plurality of current regulators regulates current drawn by respective ones of the plural loads to within a desired regulation range. The plurality of current regulators each further provide a respective error signal corresponding to an ability to remain within the desired regulation range. The error control circuit is operatively coupled to the voltage regulator and to the plurality of current regulators. The error control circuit receives the error signals from the plurality of current regulators and provides a common error signal to the voltage regulator. The voltage regulator thereby changes the selected level of the output voltage in response to the common error signal. Accordingly, the selected level of the output voltage remains at a minimum voltage necessary to keep the plural loads in the desired regulation range.

REFERENCES:
patent: 5877596 (1999-03-01), Allison
patent: 6836081 (2004-12-01), Swanson et al.
patent: 7116086 (2006-10-01), Burgyan et al.
patent: 7141940 (2006-11-01), Ortiz
patent: 7180280 (2007-02-01), Currell
patent: 2003/0001516 (2003-01-01), Newman et al.

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