Hello Hirotsugu,
There are no reference designs for the UCC28056 at such a low power level.
I'm wondering if this is for an LED application? If so, one of TI's PFC controllers designed specifically for the LED market may be more suitable.
TI has…
Hi, I have downloaded the schematic, BOM and gerbers of the 3 reference designs, namely PMP4347, PMP8010 and PMP8011. But to get these LED drivers up and going, I need the transformer and other magnetic details. Kindly oblige
Regards
Atul Bhakay
I do not have enough information to help you understand what you are seeing.
What LED driver are you using and what is your test set-up?
On a different note if you are still figuring out how you want to approach this application you could look PMP655…
Please provide circuit modification required with transformer design for
1. PMP8010 for 17.5V/400mA
2. PMP8011 for 17.5V/660mA
regards..
SURESH
dhanya_els@yahoo.com