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LED dimmer (LTC6992-1)

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stp715a

Joined May 2, 2011
8
This is a circuit based upon the design posted by SgtWookie. I have added some regulators and the signal in 0-10V modulator regulator. Circuit works great in many respects, 0-100% dimming. Only issue I am having is that on a 700ma LED the led flickers from 1-400ma. It then brightens from 400ma to 700ma but in less than one turn on a 20 turn pot. Any suggestion to the attached circuit to widen the number of turns to increase dimming is appreciated. Not concerned about the low end flickering but would like to widen the number of turns required to go from 400ma to 700ma.

Thanks for any suggestions.
 

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