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Original question:

[FAQ] Ventilator/medical blower design help and resources - *UPDATED*

Which motor driver is appropriate for a brushed DC motor

Rahul Kodaganur
Prodigy 10 points
Other Parts Discussed in Thread: DRV8873-Q1, DRV8873, DRV8701

Hi,

We are designing a respirator using brushed DC motor. Motor is 12V 6A rated. Can I use DRV8873-Q1 for this purpose or should I use DRV8703 with external N channel MOSFETs. And which microcontroller is suitable for this application.

  • 0
    TI__Intellectual 900 points

    Hello,  Rahul

    It depends on how big the continuous current will be when you spin the motor and the thermal performance on PCB. DRV8873 can handle up to 10A peak current. The continuous current it can drive will heavily rely on the PCB thermal dissipation design. External MOSFETs with gate driver eg. DRV8701 offers much better thermal performance at high current. And with smart gate driver technology, it won’t cost much design effort.