Inductor Selection for boost converter

[ds2600]

Hi

Im designing a 12-20V SMPS boost converter switching at 28Khz and I am not entirely sure on how to select the inductor size.

Do I use V = L x di/dt ?

where t would be ton of the power switch and V would be (20-12) = 8 V ?

Would I plug in values for the inductor and choose for the best di?
If so what is an acceptable ripple current? The output current is 2.5A

Thanks for any help you can provide!

 

[BuckySparks]

maybe page 4 will help

**broken link removed**

 

[ds2600]

Hi I have been studying the link you posted and it is of great help

Many thanks