Re: SMPS input filter question.


"Klaus Kragelund"

"One core I just worked with 45% rise of permeability, so you need to
derate current accordingly. The same CM choke had a RMS current spec
of 0.5A, but a measured saturation current of 3.2A at 25 degrees"


** A peak to rms ratio ( crest factor ) of 6 or more is extraordinary.

Never be seen in any normal AC supply current draw waveform.

The usual is about 2 or 3.

The OP has nothing to worry about.



........ Phil




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Relevant Pages

  • Re: SMPS input filter question.
    ... The same CM choke had a RMS current spec ... but a measured saturation current of 3.2A at 25 degrees" ...
    (sci.electronics.design)
  • Re: SMPS input filter question.
    ... The same CM choke had a RMS current spec ... but a measured saturation current of 3.2A at 25 degrees" ...
    (sci.electronics.design)