we have problems with harmonics and EMV. Our LED-Driver works fine.. but i review our design and i mesured the drain currents.
Please refer to the attched pictures.
On the Scope 0 - Picture you can see the Drain / Vin Voltage (inverted) and the Drain current. But I think this current is a fail or not really good?!
Picture Scope 2 is the Drain current with 2ms per DIV. It looks a little bit unsymetric.
But how can it come as a malfunction?
Das gesamte Design und der Transformator ist aus eurem RDR-290. The only modifications is the output power from 75W to 30W (LNK420 to LNK418).
What am I doing wrong?