Suppose I used a single DC power source as an input to multiple isolated DC-DC converters (i.e. flyback converters) and series connected their outputs to obtain a larger overall output voltage. If each converter circuit was configured the same, could I expect that the load would divide evenly among them (i.e. each converter would output roughly the same power and current)? My thought is that, since they aren't switching in-sync, there would be differences in stored energy among each converter's output cap? If so how different or how would I find the max expected current draw from any converter?
The reason I ask is because I was looking into building a flyback converter and I was following this app note: http://www.ti.com/lit/an/snva866/snva866.pdf and when calculating parameters relevant to choosing a transformer, I ended up calculating a large peak current for the primary side of the transformer. From equation 8 in that app note, this is primarily dependent on max output power and minimum input supply voltage. Anyway, it seems that a large primary side current limits me to a small selection of relatively large [in size] transformers. So I'm thinking if I can bring down the power requirement by my idea above, then it will ease in transformer selection.