I am designing a hi end SMPS and I have 1 CMC on the input (ac line) and a second on the DC output.
My question is where to place this second CMC.
Usually its best to place filters right at the source of noise. I assume that source of CMN is the secondary output of the transformer . Of course I cannot place it after the transformer , so I am thinking to place it after diode + pi filter and Cout.
Is the above better or I should place it at the cables (DC output) ?
