high voltage feedback

[krish2487]

Hello all

i m working on a 3525 based isolated boost converter which boosts a 36v DC to 380VDC.

I need an idea of how to sense a high voltage on the output and close the feedback loop

am i right in assuming that a classic Tl431 feedback can be used??
just attenuate the output through a appropriate network and use it to drive a opto

if not then what method should i be pursuing?

[luka]

Yes you are right, if you don't go over TL's max voltage at any time, you'll be fine
So you just need to drop voltage to "safe" level and I don't think you need much more then that

[krish2487]

@luka
thank you..
thank you very much.