What are the formulas for determining Lp for VIPer38LE SMPS?

[Thomas Ranz]

Posted on March 13, 2017 at 14:32

I've used the eDesignSuite to design a power supply using a VIPer38LE.  I'm verifying results and I'm having difficulty getting to the same primary inductance the design suite is.  Can someone get that info to me?  I am currently using the formulas in the Fairchild Application Note AN4137.

Thank You!

Tom

[Patrizia BELLITTO]

Posted on March 14, 2017 at 10:32

Hello Thomas,

maybe you could find something useful in this 

http://www.st.com/content/ccc/resource/technical/document/application_note/09/94/ed/b6/59/57/43/9b/CD00004190.pdf/files/CD00004190.pdf/jcr:content/translations/en.CD00004190.pdf

.

Let me know if you need other details.

[Thomas Ranz]

Posted on March 14, 2017 at 14:30

Thank You Patrizia, the App Note will be very helpful!