For a flyback converter, 120 V AC in and 400 V – 2000 V out, is it necessary to provide galvanic isolation between the input and output?
First, from a safety point, would not having a direct connection provide any benefit?
And from a certification perspective, if a product were to be sold to the public, would having the output isolated be helpful?
The high voltage is used to produce the electric field in an ionization chamber to detect radiation.
The entire system would be enclosed in a plastic enclosure, with a LCD screen at the front with some buttons and showing some system information.
Best Answer
Yes, of course galvanic isolation is valuable. Regardless of the voltages being used on the secondary side, it prevents the user from being shocked by the mains voltage in the event of some sort of fault.
Now, given that you are probably providing lots of isolation between the high secondary voltage and the end user, and provided that this isolation meets the safety requirements for "double-insulated" equipment, then galvanic isolation between primary and secondary is not strictly required.