we dev a LED-Driver based on the LNK420 (RDR-290). After many maesrued systems and varation we get a transformer desing that work. But now we have a problem with the effecient. We get a eff. of 85% @ 230V AC and a Inputpower of 30W. I optimized the output Diodes and the Drain Diode (VF).
What is the best thing to optimize the eff.? Increase the device size from 35W max. to 50W? Or the Transformer Sec. winding (smaller AWG)?
Thanks for our help!