Hi,
We use the LM5143 and there are some issue for this design;
The input voltage is 48VDC, and output voltage is 30VDC:
1. We set the potentiometer, the highside mosfet will be damaged sometime;
2. We add the load, the the highside mosfet will be damaged sometime;
3. This is the probability event；
We have no idea for this issue, please kindly provide your comment for our design, thanks.
The schematic diagram for your evaluation:
