Sunday 7 December 2014

capacitor - PWM Noise led driver


I'm working on an constant current led driver, in particular the TPS92512 from T.I.


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There's audible noise when PWM dimming.


I think that the problem is on the inductor, but I don't know how to solve it, I mean, do I have to pick an inductor with higher DCR, higher Isat, or what?




Driver


Here is the LED driver. I changed the inductor to SRR0805-150M.




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