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Question about LT3950 Demo Board DC2788A EMI test

Category: Hardware
Product Number: LT3950JMSE#PBF

Dear ADI Expert,

The LT3950 demo board DC2788A manual page 3 wrote "This PCB passes CISPR25 class 5 conducted and radiated emissions testing for automotive vehicles." My customer uses LT3950 demo board DC2788A to do the testing. The attached file is the test report. The result is not so good, why? How to improve?

PDF

Thanks & best regards.

Andy Yang.