LED dimming control circuit

Details LED dimming control circuit LED dimming control circuit

2008-01-28

2010-11-30

Philogene, Haissa (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S224000, C315S226000, C315S307000, C315SDIG002, C345S082000, C345S042000, C345S077000, C345S212000

Reexamination Certificate

active

07843146

ABSTRACT:
A LED dimming control circuit that avoids a higher output voltage than expected is provided. The LED dimming control circuit comprises an inductor, a transistor, a dimming control signal, a feedback signal, a switching control circuit, an error amplifier, and an inverted amplifier. The inductor and the transistor are coupled to a node. The switching control circuit is controlled by the dimming control signal and the feedback signal. The transistor is controlled by the switching control circuit. The output terminal of the error amplifier and the non-inverted input terminal of the error amplifier form a negative feedback path via the inverted amplifier.

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