I am trying to select a transformer for designing a dc dc isolated forward converter. Now, I see in an example a core of ETD34 (AN 2013-03 application note from infineon,page 5).
Now, as partof the primary turns calculations, the formula is as shown below, there is a factor/term called as Ae.I have highlighted that factor there.
Now, it is assumed to be 97.1x10^-5 for ETD34 core. Why is such a core selected arbitrarily? Also, if I select a different core what will be the impact on the Ae parameter ? Also, what exactly is this Ae parameter ?
For example - if I use the transformer - transformer datasheet. How can I find the Bsat and the Ae parameter for it ? It is not specified.