This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

UCC28064A: PFC Controller

Part Number: UCC28064A

The circuit was designed with reference to "700-W interleaving transition-mode PFC reference design".

The circuit below is a UCC28064A controller schematic and a PFC main board schematic.

Whe  n the load was 0A, the output was confirmed to be 390V.
However, with a load of 0.1A, the output drops to 300V and maintains 300V. The output no longer rises.
The controller does not seem to work.

Please check the circuit diagram.
Thank you.