Ballast control IC with multi-function feedback sense

Details Ballast control IC with multi-function feedback sense Ballast control IC with multi-function feedback sense

2006-12-26

2006-12-26

Vu, David (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Periodic switch cut-out

C315S224000, C315S307000, C315S291000, C315S324000

Reexamination Certificate

active

07154232

ABSTRACT:
A multi-function feedback sense input in an electronic ballast control indicates a number of lamp faults on the basis of lamp parameters exceeding specified thresholds. An end of life detection is achieved by conditioning a lamp feedback with a DC offset to provide a simple threshold comparison to determine if the lamp exceeds specified operational boundaries. An open filament, absent lamp or broken cathode is detected on the same feedback sense by detecting an open circuit in the lamp filament and driving the sense feedback to a shutdown state in the event of a filament open circuit. The ballast control includes a current sense feedback for detecting overcurrent conditions as well as lamp faults so that the control detects an end of life condition, lamp absence, broken lamp, open filament, broken cathode, overcurrent, hardswitching or failure to ignite fault with a minimum number of feedback sensors. The ballast control provides a number of protections with a simplified circuit to reduce cost and improve functionality of the electronic ballast control.

REFERENCES:
patent: 5705894 (1998-01-01), Krummel
patent: 5930126 (1999-07-01), Griffin et al.
patent: 5969483 (1999-10-01), Li et al.
patent: 6008592 (1999-12-01), Ribarich
patent: 6031342 (2000-02-01), Ribarich et al.
patent: 6211623 (2001-04-01), Wilhelm et al.
patent: 6232727 (2001-05-01), Chee et al.
patent: 6525492 (2003-02-01), Ribarich
patent: 6617805 (2003-09-01), Ribarich et al.
patent: 6822401 (2004-11-01), Borella et al.

Affiliated with

Also associated with

Rating

Ballast control IC with multi-function feedback sense 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 control IC with multi-function feedback sense, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ballast control IC with multi-function feedback sense will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3694192