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Max board thickness for Coil design

Joe Tiseo
Prodigy 50 points

Hello, I was trying to design a coil for the LDC1000 using the Webbench coil designer and Noticed that there is a max layer spacing of 60 mils.  Is this a hard cut off?  The standard board thickness we use here is 62.8mil will this be a problem?  If I exclude the top and bottom layer thickness from the stackup it is closer to 58mils, with tolerancing I would exceed the 60 mil max.

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    TI__Genius 14270 points
    Hi Joe,

    There is no issue with using a thickness of 64mil for the PCB. You will have slightly less coupling, and so the inductance will be slightly lower due to the increased thickness.

    We have made many 2 layer sensors with 64mil thickness and they work fine for LDC applications.

    Regards,

    ChrisO