Electronic ballast with higher startup voltage

Details Electronic ballast with higher startup voltage Electronic ballast with higher startup voltage

2011-01-11

2011-01-11

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000, C315S2090SC

Reexamination Certificate

active

07868559

ABSTRACT:
An electronic ballast with higher startup voltage includes converter with a switching circuit (40) responsive to a switching control signal (50) and operably connected to a DC bus (30); a DC controller (44) comparing a sensed DC bus voltage signal and a reference DC bus voltage signal to generate the switching control signal (50); and a startup adjustor operably connected to the DC controller (44) to adjust at least one of the sensed DC bus voltage signal and the reference DC bus voltage signal for a predetermined time at startup so that startup DC bus voltage is greater than steady state DC bus voltage.

REFERENCES:
patent: 5834906 (1998-11-01), Chou et al.
patent: 6057652 (2000-05-01), Chen et al.
patent: 6459213 (2002-10-01), Nilssen
patent: 6621238 (2003-09-01), Nerone et al.
patent: 6628091 (2003-09-01), Griffin et al.
patent: 2002/0003525 (2002-01-01), Hwang
patent: 2002/0185982 (2002-12-01), Shen
patent: 1387475 (2004-02-01), None

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