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LMR16006Y-Q1: LMR16006Y-Q1 cannot pass EMC test

Part Number: LMR16006Y-Q1

Hi team,

My customer is using the LMR16006y now, They meet some problems when do EMC test. It cannot pass the test. i have checked the layout, it seems to be good enough.




i have let them try three methods:

1. add 5.1R resistor series with the Cboot.( test results become worse)

2. add 1nF cap in parrel with the low side sense resistor ( no help)

3. solder the inductor out of the board, then solder it with long line.(no help)

Do you have some suggestions or comments about it?

Thanks.