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AC/DC and Isolated DC/DC Power
AC/DC and Isolated DC/DC Power Forum
Problem EMC with LM5015
I use the LM5015 to convert the +24V in +6.5V.
The circuit don't pass the EN61000 because the power in the 250kHz-40MHz is too much.
I don't know how to solve this problem.
Have you a solution to reduce the power in the 250kHz-400MHz bandwith?
give me more information about : "noise", power source, output power, switching frequency, efficiency on "full load, PCB (size and number of layers)...So fare (i could not read values on schematic) i have some suggestions:
-CMC is very effective in EMI reduction, on input and output power line (input filter can bee smaller)
-Remove unused winding from transformer, and add Cu shield grounded on primary side
-Add RC snubbers across rectifiers (with scope you can verify reduction in "ringing" and "overshoots" )
Thanks for your answer.
I already reduce noise by increase decoupling capcity to ground.
I will test with an other transformer.
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