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Original question:

TIDA-00620: CHANGES IN DESIGN TO SUIT HIGHER VOLTAGE

TIDA-00620: 12VDC 100A unidirectional brush motor drive

Kevin Wells1
Prodigy 10 points
Part Number: TIDA-00620
Other Parts Discussed in Thread: DRV8701, , DRV8702D-Q1, DRV8320

I am interested in using an architecture similar to the TIDA-00620 to drive a 12VDC brush motor at 100A in a unidirectional application. I am concerned that the DRV8701 does not have enough output current to drive several high current mosfets in parallel. My application is not 4 quadrant, we only need to drive the motor in one direction. Braking would be nice but it is not necessary. Can you recommend the changes required to make the TIDA-00620 design operate up to 100A? Thank you. 

  • 0
    TI__Guru** 114905 points

    Hi Kevin,

    For a unidirectional application, the DRV8702D-Q1 may be a better choice.

    There drive currents are slightly higher at 225mA source and 430mA sink. Please note section 8.2.2 for guidelines on FET selection, IDRIVE configuration, and VDS configuration.

    If more drive current is needed, some of the BLDC gate drivers (example is DRV8320) have up to 1A source and 2A sink currents.