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DRV8711: How can use it for driving stepper with encoder ?

Part Number: DRV8711
Other Parts Discussed in Thread: , DRV8704

Hi everyone,

I am currently working on a driver solution for steppers with encoder that can handle 10 Amps. I found the way to do 10 A out with external FETs (DRV8711EVM), however, I want to implement a magnetic encoder to my stepper to make this system closed.

So here is my question, can i regulate the output voltage of the driver, with the information that comes from the encoder.

I mean, is it possible to control the external FETs with this regulated voltage and increase/decrease the OUT voltages by doing so.

I viewed the datasheet however could not find any answer to my question. 

Any help would be appreciated.

Thanks in advance,

Oguz

  • Hi Oguz,

    The DRV8711 is designed to control the motor voltage(current) at each step independently. If you want to create a closed loop system and regulate the voltage, please consider using a different device.

    The DRV8704 is one that may fit your needs. It has many of the same features of the DRV8711 but is set up for PWM inputs. You can control the voltage/current using external circuitry.