UCC28070-Q1: PFC Inductor clarification & UCC28070 Calculation for interleaved topology

Hello Team,

I am using PFC controller UCC28070 IC for AC to DC 3.3KW application.

Below is the specification

I/p voltage-85-265Vac

I/p Current-16 Arms

Op vltg-200-420 Dc(380V nominal)

Op current-12A

PFC freq=67 KHz

TOPOLOGY-INTERLEAVED

So in this I have already tested with PFC section with no load.It perfectly works.

But when I am applying the load ,PFC voltage starts decreasing.Is there any modification needed?

Here we used PFC choke value is 500uH.Is this correct for this application?

I am attaching schematic for PFC section.Kindly check and suggest the modification.

Thanks.

Anuradha

ACDC.xlsx