Lamp ballast for circuit driving multiple parallel lamps

Electric lamp and discharge devices: systems – Current and/or voltage regulation

Reexamination Certificate

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Details

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.

REFERENCES:
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patent: 5869935 (1999-02-01), Sodhi
patent: 6031342 (2000-02-01), Ribarich et al.
patent: 6326740 (2001-12-01), Chang et al.
patent: 6483260 (2002-11-01), Flory, IV
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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