Is this possible?
I have a 12V regulated supply that I need a 36V and 5v (100W total) supply from to power a peripheral and power the control circuit for said peripheral. This peripheral uses a piezo self resonating oscillator so I need to isolate it from sensitive analog measurements on the CPU that'll be the master of the peripheral. The control circuit will send/receive RS232 commands to/from an isolated RS232 transceiver IC on the CPU.
To repeat me question, is DC-DC galvanic isolation possible without inverting/transforming/rectifying? I want 1:1 isolation for the 12V supply which I'll then buck/boost with a double ended switching converter. I want to avoid creating a flyback converter since that'll destroy my BOM cost and transformers are BIG.
EDIT: I think I am over-complicating things and wasn't completely understanding the task given to me. Even so, I am still curious what the community has to say about DC-DC isolation since it's much more of a rabbit hole than AC isolation.
EDIT2: Closing this question since it is no longer applicable to my work and I believe Bimpelrekkie answered in sufficiently. Thanks Stack Exchange Community!