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TPS65094: TPS65094 inductor

Isee
Expert 6760 points
Part Number: TPS65094


Hi, I was looking at the formulas for calculating the needed inductors for the swich nodes. The datasheet seems to hint that the designs are optimizef for 0.47 uH inductors. Now, if I plug the data into the Intel Atom calculator (voltage/current) that gives me the result that  I would need an inductor beyoned 0.47uH. Where do the 0.47uH come from? They are also in the reference design... Regards, Andreas

  • 0
    TI__Intellectual 1990 points
    Hi Andreas,

    Thanks for the post! I have assigned this post to the expert on this device who may have little more background on the Intel Atom calculator. We will get back to you soon with a response. In the meantime, could you provide the voltage and current values you used for the Intel Atom calculator? Thanks!

    Regards,

    Paul Kundmueller
  • 0
    TI__Genius 17380 points

    Hi Andreas,

    Thank you for posting your question to E2E.

    We used 0.47 uH for BUCK1, BUCK6, and BUCK3-5 because it is a good balance between efficiency and transient while also minimizing BOM cost by consolidating into fewer component types. 

    Other values can be used. For example, a higher inductance can be used to improve efficiency on BUCK3/4/5, however the output capacitance will need to be modified as well and the customer will need to validate their own end result to ensure it is in Intel spec. 

    I haven't heard of the Intel Atom calculator before, is their an IBL# associated with it I can use to find it?