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TPS62746: Difference in efficiency by inductor

Yuto Sakai
Mastermind 6100 points
Part Number: TPS62746

Hi,

Could you tell me about difference in efficiency by inductor?
I believe that figure 14 in the data sheet shows the difference in efficiency at each inductor.
Compared to MIPSZ2012D 2R2 (FDK) and 744 797 752 22 (Würth), Würth's inductor is inefficient, despite the low DCR.
Please tell me the reason for this result.

Best regrads,
Yuto Sakai

  • 0
    TI__Guru*** 144880 points
    Hi Sakai-san,

    Besides DCR, the inductor construction and core material also contribute to efficiency/loss. This is most true in the lower current region, where AC losses dominate. These inductors likely have different core materials and constructions, especially since they come from different vendors.

    What Vin, Vout, and Iout do you need? Where is the efficiency of interest?