Hello,
I am building a buck-boost converter which needs to have the following parameters,
- Input voltage range : [8 - 55] V
- Output voltage : 12.5V
- Max output power : 500W
Currently I am facing two major problems:
- For input voltages less than 13V the output voltage doesn't regulate to 12.5V (in no load), so it doesn't work properly both in buck-boost region and in boost mode.
- For output load more than 20A ( >250W) the converter stops working immediately - the output voltage is not anymore regulated to 12.5V
I have run the design in Webench and everything seemed fine. I attach the schematics.
Thanks for the help