dc-dc converter tl494
Well a transformer will not allow you to convert dc to dc since the tranformer input looks like a short circuit at dc. So there is no way to use a transformer directly.
If you do want to use a transformer, you have to first chop your dc input into a square wave and then maybe send that through the transformer. But maybe I am misunderstanding your proposed solution.
Either way, if your input is dc and you want a dc output a dc/dc converter is probably the easiest solution to get a boosted voltage at the output with good regulation.
Best regards,
v_c