What size inductance for a flyback transformer?

I'm looking over some equations for the output of a flyback transformer (essentially the same as for a buck-boost converter) and I notice that as long as the flyback operates in the continuous mode, the inductance doesn't enter into the equation. Of course since no inductor is ideal, there must be a way to determine the optimum primary inductance for a certain output voltage and power level. How would one go about doing this? Thanks for any advice! Edit: I've done a little more reading and I think I have some idea - if the inductor value is too high, the current through the inductor will not rise fast enough to provide enough current for the load during the switching period and there will be excessive losses in the winding resistance, and if the inductance is too low the core will saturate at too low a current. Does that sound about right?,Last edited: Jul 11, 2009

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