Flyback - Common Mode Filter question

wwwenrico · Mar 9, 2015

Hi,

I'm designing an off-line 50 W Flyback converter.

Can anybody explain me the difference between Toroidal shape and the UU common mode filters.

When one should use toroidal shape instead of UU filters?

Thanks,
Enrico Migliore

ahsan_i_h · Mar 10, 2015

The advantage of the toroidal shape is that due to its symmetry the amount of magnetic flux that escapes outside the core (leakage flux) is minimum, therefore it radiates less electromagnetic interference (EMI) to nearby circuits or equipment.

Ref: https://en.wikipedia.org/wiki/Toroidal_inductors_and_transformers

Flyback - Common Mode Filter question

wwwenrico

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ahsan_i_h

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Flyback - Common Mode Filter question

wwwenrico

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