Design of transformer based on primary inductance and turns ratio

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fiend

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Hi,

I am trying to do a flyback converter using linear technology's LT3573:
http://cds.linear.com/docs/en/datasheet/3573fd.pdf

Following their design example/steps, the turns ratio and primary inductance are calculated first:

Is it ok to go about designing a transformer in this way? And how do I begin to do so?
 

CHoose from the recommended transformers until you get good results then consider transformer design as a cost reduction if you have enough volume.
 

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