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This paper studies the conducted electromagnetic interference (EMI) problems in a DC/DC switched-mode power supply (SMPS) with semi-isolated topology. A high frequency circuit simulation model is firstly established to predict the conducted emissions of this power supply. Then the common mode (CM) and the differential mode (DM) conducted emission mechanisms of this power supply are analyzed in detail...
A CE test layout with LISN at output side is proposed for a telecommunication immediate bus converter, which includes load's RF input impedance influences. Both the CM and DM paths of the interleaved Boost converter are analyzed in detail. The CM role of the output voltage ripple noise of the converter is explained and a non-intrinsic CM phenomenon caused by original DM sources is discovered too....
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