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DRV8412 - PVDD_B & C ampacity issue

Joe Lentz
Prodigy 10 points
Other Parts Discussed in Thread: DRV8412

Are all of the PVDD_x pins tied together internally?

I'm concerned with the PCB layout that a 12 mil wide trace @ 1.5oz Cu is going to current limit channels B&C when using the DRV8412 at it's max current.

(I'm using 24-48V for PVDD_x)

thanx..........

  • 0
    TI__Guru** 114905 points
    Hi Joe,

    The PVDD_x pins are not tied together internally.

    Please note section 7.4 of the datasheet:

    Because each half bridge has independent supply and ground pins, a shunt sensing resistor can be inserted
    between PVDD to PVDD_X or GND_X to GND (ground plane). A high side shunt resistor between PVDD and
    PVDD_X is recommended for differential current sensing because a high bias voltage on the low side sensing
    could affect device operation. If low side sensing has to be used, a shunt resistor value of 10 mΩ or less or
    sense voltage 100 mV or less is recommended.