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DRV8962: parallel bridge mode and the value of inductance in series

Lenio Cacula
Genius 16780 points
Part Number: DRV8962


How exactly did we determine the range of 30nH to 100nH to be placed after the output pins when using parallel bridge mode? We are trying to understand how much leeway we have in the design. Thank you!

  • +1
    TI__Mastermind 47915 points

    Hi Lenio,

    Because the output stages were not purposely designed for parallel operation we expect slight mismatch with timings including dead time for eliminating shoot through current.  The series inductance will help to prevent any shoot through between two paralleled channels during switching transient due to mismatch of paralleled channels (for example, asymmetric PCB layout, etc). Higher currents and slower switching may require up to 100nH. Perhaps you can empirically determine this with switching time (rise time / slew rate).

    Regards, Murugavel