Power factor correction circuit for electronic ballast

Details Power factor correction circuit for electronic ballast Power factor correction circuit for electronic ballast

2006-02-14

2006-02-14

Lee, Wilson (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315SDIG002

Reexamination Certificate

active

06998795

ABSTRACT:
A power factor correction circuit for the electronic ballast of a fluorescent lamp is provided. The power factor correction circuit is located between a bridge rectifier circuit and A high frequency oscillation circuit of the electronic ballast, and includes a filtering capacitor charge/discharge circuit and a feedback circuit taking input from a filament of the fluorescent lamp. The electronic ballast equipped with the power factor correction circuit achieves a power factor >0.95, a lamp current crest factor <1.7, and a total harmonic distortion <10%.

REFERENCES:
patent: 5519289 (1996-05-01), Katyl et al.
patent: 5559395 (1996-09-01), Venkitasubrahmanian et al.
patent: 6222322 (2001-04-01), Stack
patent: 6781326 (2004-08-01), Stack

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