LM2676 - Data sheet design result vs Webench result

Carl Hagenmaier

The data sheet has a workup of an example design (28 volt input to 14.8 volt, 2 A output). It uses a 68 uH inductor. With the same operating parameters, Webench's result uses a 33 uH inductor. Which, if either, should I believe?

over 9 years ago

0 Frank De Stasi over 9 years ago

TI__Guru 73515 points

Both inductors will work. Webench tends to give a more optimized design than the data sheet. I will pass this to the Webench team to see if they have any other inputs.

0 Howard Chen-WEBENCH Design Center over 9 years ago in reply to Frank De Stasi

TI__Expert 6365 points

Hi Carl,

I checked WEBENCH per your design inputs and the design came up with a 47uF for the inductor using ~30% ripple current. Like Frank stated, both will work.

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LM2676 - Data sheet design result vs Webench result