What kind of design should I make to support CISPR25 and class5? Is it possible to suppress noise by strengthening Vin or SW? I could improve it by attaching an LC filter (100uF: aluminum electrolytic capacitor and 47uH) on the Vin side, but I am not satisfied with class 5 yet. The switching frequency is from 2.2MHz to 0.36MHz. The board has two layers and the back side is solid GND.
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