Common manner performed emissions usually are brought on by parasitic capacitances like People in the heatsink and transformer along with the board format, and switching voltage waveform across the swap. An unbroken floor plane Positioned within the outer surfaces of your PCB gives the shortest return route for EMI, especially https://collinemplb.thenerdsblog.com/36887608/an-unbiased-view-of-emc-vs-emi-filter