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Please provide more application details (like Vin,V out , load, application specific etc.) based on that please visit our application note as an example for 3 options of dimming method of the LED. http://www.onsemi.com/pub_link/Collateral/AND8470-D.PDF PWM dimming, analog dimming or BI-level dimming. Thank you.
Answered by: ON Semiconductor
2012-01-26 20:29:10.0