LMR54410: LMR54410F inductor selection calculation support

Anusha M U

Prodigy 115 points

Part Number: LMR54410

hi,

As per the calculation we are getting the inductor value around 9.78uH and per the test bench its 12uH,

https://webench.ti.com/power-designer/switching-regulator/customize/26?noparams=0

And as per the datasheet its around 15uH

Please help us with calculation guidelines

over 2 years ago

0 Gui He over 2 years ago

TI__Mastermind 27636 points

I will check and get back later.

Thank you

0 Gui He over 2 years ago in reply to Gui He

TI__Mastermind 27636 points

Hi Anusha

The 15uH in datasheet, I think the Vin_max is 36V here, and the fsw is 1100kHz, from the Table 9-2. In your calculation, The Vin_max is 24V, not sure what the fsw is.

For the Webench, if the Lmin is 9.78uH per your calculation, I think 12uH Is a acceptable value.

Thanks and best regards.

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LMR54410: LMR54410F inductor selection calculation support