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LDC1312-Q1: Coil Design

Deepshika Borundiya
Prodigy 20 points
Part Number: LDC1312-Q1

Tool/software:

I require assistance in designing the coil. While designing the coil, is it mandatory to have the coil in the 1st and 2nd Layer of PCB can the coil be drawn in internal layers? How will the field be affected?  

  • +1
    TI__Mastermind 24805 points

    Hey Deepshika,

    Have you tried using our LDC-CALCULATOR-TOOL?  You could use internal layers.   However, you need to make sure that you do not route traces (not associated with the coil) directly above or below the coils.  The board material will likely have a higher permeability than air.  Therefore, given the following conditions:

    Condition1: inner coils

    Condition1 Target distance = distance between outer coil to board surface +distance from board surface to target

    Condition2: outer coils

    Condition2 Target distance=distance from board surface to target

    When Condition1 target distance = Condition2 Target Distance, Condition1 should have a slightly larger inductance, lower frequency range.

    However, if you have a relatively thin board, this difference might be negligible.