cascaded current fed push pull design example

Hello,

I'm looking for an application note on the LM5041 from NS (http://www.national.com/pf/LM/LM5041.html#Overview).

There is an evaluation board available for this circuit, but i can not find any document where this "cascaded current fed push pull" power supply topology is described, with a numerical example given for design purpose.

Any procedure which starts from input-output requirements and leads to the components values  - even for an other part - is welcomed.

Thank you for your help,

Best regards, Gilles.