T
treez
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Pages 22 and 23 of the L6564 datasheet show that Boost PFC controllers need to sense the instantaneous mains voltage, and then increase the FET current at the zero crossings. This is to reduce crossover distortion and thus reduce THD.
Why does the LT1248 PFC controller not mention this feature? Does it not have this feature? How does it avoid the LC filter ringing that otherwise occurs near the zero crossing if this feature is not present?
L6564 datasheet
https://www.st.com/resource/en/datasheet/l6564.pdf
LT1248 datasheet
https://www.analog.com/media/en/technical-documentation/data-sheets/1248fd.pdf
Why does the LT1248 PFC controller not mention this feature? Does it not have this feature? How does it avoid the LC filter ringing that otherwise occurs near the zero crossing if this feature is not present?
L6564 datasheet
https://www.st.com/resource/en/datasheet/l6564.pdf
LT1248 datasheet
https://www.analog.com/media/en/technical-documentation/data-sheets/1248fd.pdf