UCC28070: MOSFET Failure at 2.6 kW Load in 4 kW PFC Design

Failed to upload data together.
This is the design material I made.
4572.PCB_Project.pdf
schematic

UCC28070_Design_Tool_2.0_4KW 250611 - 220V 전용.xlsm

=> design tool

Do you have the waveform when you applied 2.6kW on the output. What kind of debug activities have you conducted and what are the observations?

Please contact our FAEs offline for design debug supports. They can connect us to you directly via email. If necessary, a meeting can be arranged too.

Thanks

Ning Tan said:

용했을 때의 파형이 있나요? 어떤 종류의 디버깅 작업을 수행하셨고, 어떤 관찰 결과가 있나요?

How do I contact the FAE?
I'm still not good at debugging because I'm a beginner

You can start contacting TI office in Korea first.

https://www.ti.com/info/contact-us.html

This forum is intended to be used to address IC related questions. 

At the high level, if you have no heatsink for the power FETs, most likely, it will overheat at 2.6kW Pout and burn out. You can try to add heatsink first.

Again, please make sure you measure the waveforms and conduct basic debug activities if you continue to observe issues.