dc/dc gen 2 converter 400v 12v

[traikerS]

The converter works up to 300v or a little more, how to make it work at 400v. for gen 3, the divisors simply change, but for 2, what should be changed? I didn't find any relevant information, maybe I missed it. Thanks in advance for your help.

[Ev8]

Something I’ll be looking at again soon as I’m increasing battery voltage and the gen2 Dc-dc shuts off at about 330v I did once identify 2 resistor networks from the input that I believe to be the voltage sensing, have misplaced the pictures though so need to start again.

[Bigpie]

Can you use the buck boost to buck down the 400v to 200v?

[Ev8]

Yes that’s another way to do it, I believe Johannes did that with the Audi…

[traikerS]

Hello, can you be more specific which resistor chains have been changed.