Three-stage electronic ballast for metal halide lamps

Details Three-stage electronic ballast for metal halide lamps Three-stage electronic ballast for metal halide lamps

2005-02-15

2005-02-15

Vo, Tuyet (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S2090SC, C315S307000

Reexamination Certificate

active

06856102

ABSTRACT:
A three-stage electronic ballast for metal halide lamps mainly comprises a step-up converter, a step-down converter and a full-bridge DC-AC converter, wherein the step-down converter operates an inductor in a continuous boundary current mode to achieve reducing power loss and enhancing efficiency. Equipped with a micro processor, the electronic ballast further possesses the function of power regulation. The electronic ballast can be added with various protective functions without complex control circuits and sensing elements, thereby becoming a high-quality and low-cost electronic ballast for metal halide lamps.

REFERENCES:
patent: 5381076 (1995-01-01), Nerone
patent: 6107754 (2000-08-01), Kim
patent: 6188177 (2001-02-01), Adamson et al.

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