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LM3481 EMI problem

airton bento
Prodigy 170 points
Other Parts Discussed in Thread: LM3481SEPICEVAL

I bought an evaluation board  "SV600184-001 LM3481SEPICEVAL/NOPB", and I did tests with the cispr22 and the result was bad, 80MHZ, I did a PCB with the same mode and did the same problem with EMI, what can I do to solve it? My application is a DCDC converter with 3 outputs, 18Vx1A, -18Vx1A, 5Vx1A, the input 26V.

Airton.