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Trying to break the DRV8850

Chris Neugebauer25
Prodigy 10 points
Other Parts Discussed in Thread: DRV8850

I am trying to break the DRV8850.  I have tried to do a reverse while the motor is still free spinning but this has a tendency to pop my DC to DC converter that is supplying it.  What I mean is it causes the Boost converter output FET to short open.

Is there a better way to break the motor.  I am using this motor on a slide for precise position and speed control.    Is there a better part.

Stall current is 4A,  Nominal Current 660mA .

Supply voltage  Min 3.0V - 4.75.

~Chris 

  • 0
    TI__Guru** 114905 points
    Hi Chris,

    I think you meant you want to "brake" (stop the motor quickly) the DRV8850. Is that correct?

    If so, you can set both INxL high and both INxH low. This will stop the motor by recirculating the current through the low side FETs.

    With a supply voltage of 3.0 to 4.75 and stall currents of 4A, this is a good device.