This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DRV8880 / DRV8846 question

Other Parts Discussed in Thread: DRV8880, DRV8846, DRV8803, DRV8806, DRV8804, DRV8805

Dear Sir 

My Motor spec as below red mark 

I would like to know which solution is suit for below motor ?? DRV8880 or DRV8846 ??

I hope have autotune function ,

Another question ,I have another motor can support 1deg/step ,which solution can support both of solution

Thanks

  • Hi Kai,

    What is the system voltage provided to the DRV8846 or DRV8880?

    Assuming the voltage is greater than 6.5V, the DRV8880 can operate the motor. The motor will have to be configured as a Bipolar stepper, using A and /A and B and /B.

    Configuring the motor as a bipolar will change the torque characteristics. It is suggested to determine if the change in torque is acceptable.
  • Dear Duncan

    About our motor 's SPEC ,It is a unipolar motor ,rating current 1.2A ,rating voltage VM is 4V and 1.8deg/step
    Do you have suggestion unipolar motor driver solution could provide??


    Thanks
  • Hi Kai,

    Please look at the DRV8803, DRV8804, DRV8805, and DRV8806. All four have similar outputs for driving a unipolar stepper motor. The difference is the input interface. None of the devices have current regulation, so one approach to limit the current is to use the DRV8803 with a PWM interface.
  • Dear Duncan

    If my motor VM is 4V ,could I use DRV880x??
  • Hi Kai,

    Our design team says that you can do so.

    The VM pin on the DRV880x will need >8.2V to operate. The motor VM can then be set to 4V and the VCLAMP can be connected to motor VM as shown.
  • Dear Duncan 

    Thanks for your help ,if i change the motor VM from 4V to 12V ,which hero product you will suggest ?? DRV8805 or DRV8806

    I have another SPEC need to do 0.9°/step ,spec is like below (6 wire / unipolar / 0.4A) 

    Do you think DRV8806 or DRV8805 can do 0.9°/step ??

    Thanks

  • Hi Kai,

    The DRV8805 or DRV8806 are both capable of driving the motor. It is up to the customer to decide which interface is preferred (STEP/DIR or Serial) or if there is another reason to prefer one. The DRV8805 has a higher voltage range. The DRV8806 has open/short detection.

    Yes, the DRV8805 / DRV8806 can move the motor above at 0.9 degrees / step.