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DRV8871: design with DRV8871 and INA199

Muller Zhu
Prodigy 250 points
Part Number: DRV8871
Other Parts Discussed in Thread: INA199,

We design full bridge with DRV8871 to drive brush motor; And we need INA199 to enlarge the voltage to get the current；

And question is how to handle the all connection of GND? Such as MCU(GND) and DRV8871(GND)and INA199(GND) 

  • 0
    TI__Guru** 114905 points
    Hi Muller,

    It is recommended to connect MCU GND, DRV8871 GND (pin1), and INA199 GND together.

    DRV8871 PGND is the high current path, and should be connected to system ground separately. The shunt can be place between PGND and system GND, or between system power and DRV8871 VM.