With the figure of 72 nH/T2, you need 100000/72 = 1389 turns squared, so around 37 turns. In your example, you may need to calculate a few times. I just saw that I got my units wrong in my first answer, which I've now corrected. If you are using mains voltages, be careful to make sure that you have the correct isolation between windings, and testing can be dangerous. What sort of SMPS is it? There are flyback converters, and forward converters. I suspect a lot of trial and error goes into it even with established manufacturers. The maximum power capability depends on so many factors that the core manufacturers can't possibly quote it. With 10 turns, and a DC current of 20 A, there would be 200 A.T (Amp turns) so the AL would have dropped to about 32nH/T2, so the 10 turns would only be giving 3.2 μH The DC bias curve shows how the inductance would reduce as the DC bias increases. Those factors allow you to calculate the inductance, so the one in the data sheet would have an inductance of 7.2 μH with 10 turns or 28.8 μH with 20 turns. Either N or T are used for number of turns. You quoted AL=95nH/N2 and the datasheet for the other core quotes AL = 72nH/T2. There is a gradual saturation, which is why there is a DC bias curve. There is no exact maximum current without saturation.
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