Isolation of FPGA board from high voltage

I designed a 30 kV, 1 A DC power supply with voltage regulation of 0.2 %. It is basically a switching mode power supply. I interfaced it with my FPGA board in feedback loop using a isolation transformer with a ratio of 1000:1. when i tried to run the feedback control system, my FPGA board gets some issue. The protection diodes at the USB side of FPGA board gets destroyed. I think that there is some isolation needed from high voltage due to conducted noise. Do i need to use EMC filters for my FPGA board power. Please suggest any solution.

Regards,

Abhishek Singh

 

 

Hi Abhishek,

The best isolation between digital and analog components is a combination of Optoisolator and protection diodes or transistors. You can also consider TVS diodes as part of protection. In any case, diagrams or simple image of your power supply design will also help to analyze what really suits to your system.

Hope it helps.

God Bless.

Best,
Neil