Note: A high DM noise signature may mask improvement in CM
noise performance related to AEF. A reduction of CM choke inductance may
also reduce leakage inductance, which could impact DM noise attenuation.
Install higher X-capacitance or a discrete DM filter inductor to manage DM
attenuation as needed. Also, use a DM-CM noise splitter to isolate the CM
component of the measured total noise.
Figure 9-5 CISPR 32 Class B
EMI Mitigation Result with AEF On and Off (EN Tied High and
Low)