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LM2577: LM2577 application note as a forward converter problem

Part Number: LM2577

Hello, Im trying to desing a DC-DC converter as a forward, based on the application note: AN-776 20 Watt Simple Switcher Forward Converter (Rev. A). First of all the subscripts of the variables changes every time and it makes difficult to understand. But the problem is that on page 4 Lp= 357 uHy, but then on page 5, uses 10% of Lp (called LL) and get a value of 7 uHy. I wish you could help to solve why uses 7 uHy.

App note: www.ti.com/.../snva027a.pdf

Thank you.

Fernando.