I am looking to add an isolated 10-12V supply capable of producing ~200mA to an existing circuit which has 5V and 12V rails available on the board. I would prefer to use the latter (12V) as it can withstand more loading, if that is possible.
I believe what I need is a DC/DC isolated converter, and after some research I think my choices are either a flyback topology, or a push-pull topology, given the power output requirements.
I already have at hand some ferrite cores (E cores and some toroids), so I will probably buy some enamel wire and wind the inductor/transformer myself. That being said, the topology doesn't seem to make a difference, component-wise; i don't mind winding more turns or adding an extra diode and transistor.
Can you suggest a specific approach? Maybe you prefer one over the other? Or maybe one of them is easier to implement?
P.S. Why is it that information about push-pull converters is so scarce? (at least compared to flyback ones)