Ballast dimming control IC

Details Ballast dimming control IC Ballast dimming control IC

2005-02-22

2008-08-05

Philogene, Haissa (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000, C315S2090SC, C315S194000, C315SDIG002, C315S224000

Reexamination Certificate

active

07408307

ABSTRACT:
An electronic ballast provides dimming control, fault detection and safety features for overcurrent protection and hard switching at a half bridge. A voltage controlled oscillator supplies a switching frequency that is modifiable based on operational feedback parameters. A dimming control signal controls a phase shift between output current and voltage of the half bridge for controlling output power. A feedback circuit senses load current and output voltage to determine fault conditions and to provide control information for adaptively adjusting the frequency of the voltage controlled oscillator. By appropriately controlling the voltage controlled oscillator output, the electronic ballast maintains a zero volt switching with minimum current switching to achieve an efficient and robust electronic ballast control. The entire control function is integrated on a single integrated circuit.

REFERENCES:
patent: 5615093 (1997-03-01), Nalbant
patent: 5798620 (1998-08-01), Wacyk et al.
patent: 6008593 (1999-12-01), Ribarich
patent: 6801028 (2004-10-01), Kernahan et al.
patent: 6807070 (2004-10-01), Ribarich
patent: 6891339 (2005-05-01), Ribarich et al.
patent: 6949888 (2005-09-01), Ribarich
patent: 2003/0006720 (2003-01-01), Borella et al.
International Rectifier Data Sheet No. PD60194—A for IR21592(S) and IR21593(S), www.irf.com, 25 pages, Nov. 13, 2003.

Affiliated with

Also associated with

Rating

Ballast dimming control IC does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ballast dimming control IC, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ballast dimming control IC will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4008618