Lamp ballast for circuit driving multiple parallel lamps

Details Lamp ballast for circuit driving multiple parallel lamps Lamp ballast for circuit driving multiple parallel lamps

2008-05-13

2008-05-13

Tran, Thuy V. (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000

Reexamination Certificate

active

11063427

ABSTRACT:
A lamp ballast circuit for driving, e.g. four flourescent lamps with a ballast control IC such as the IR2167 Ballast Control IC. The circuit includes a lamp replacement detection circuit for detecting insertion of a lamp, and in response, controlling the ballast control IC to initiate automatic restart for of the control IC for proper firing of the lamps, including the newly inserted lamp.

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patent: 6628091 (2003-09-01), Griffin et al.
patent: 7154232 (2006-12-01), Contenti et al.
patent: 2004/0263089 (2004-12-01), Contenti et al.

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