Notification 573 - For best EMI performance NFB should be set to the suggested value

CATEGORY

ISSUE / RESULT

FIX / REFERENCE(S)

Warning

For best EMI performance the number of feedback winding turns (NFB) should be set equal to the value suggested on the PI Xls spreadsheet.

If this value is not changed, EMI performance of the power supply will not be as good unless other techniques or empirical testing shows otherwise.

• Change the value of NFB to the value suggested

• You may safely ignore this message if the EMI margin is sufficient with the value used.