I don't have this IC so I have a question if LT4320 will work properly when it's powered from half of the rectified supply.
Nominal AC voltage is 42V ±30%.
See attached LTSpice file.
Thank you Eric. That is what I was afraid of.
OK, so I will connect outp to OUT. Will it work with this passive PFC?
This circuit will not work. LT4320 relies on the OUTP pin sensing the output voltage for proper operation. Also, 42VAC with ±30% tolerance exceeds the recommended 72V peak operating voltage range and is close to the 80V absolute max for the IN1, IN2, and OUTP pins.
LT4320 should work with PFC as long as OUTP to OUTN remains above 9V.
That's great. Thank you.