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UCC 28180 - PFC current wave shaping

saggoken
Prodigy 10 points

Hi,

I have a question about the functionality of the UCC 28180 PFC chip and how it manage to shape the current after the line without line sense feedforvard? I think it is the same functionality on the 28019 and 28019A PFC chip as well. Someone that know how it works or have a paper about it? Then I would be very happy.

Thanks,

Per Mossadeghi Björklund