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CM- or DM-coil from SMPS to single-ended classD?
CM- or DM-coil from SMPS to single-ended classD?
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Old 16th January 2020, 11:16 AM   #1
TroelsM is offline TroelsM  Denmark
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Default CM- or DM-coil from SMPS to single-ended classD?

Hi.

I'm (almost) embarrassed to ask this as it should be pretty simple, but I can't make up my mind so here goes:

Given a LLC-SMPS delivering +/-60V to a single-ended classD-amp: would you put a common-mode- or differential-mode-coil betweem PSU and Amp?

The purpose of the coil is dual: filtering noise from PSU to amp, but maybe also filtering the switching from the amp getting back into the supply (or radiating out from connecting wires).

Or is both "wrong"?

Kind regards TroelsM
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