DRV8711: Request for Support – Motor Stalling at High RPM Using DRV8711

Tool/software:

Dear Team,

I am working with the DRV8711 stepper motor driver and using external N-channel MOSFETs (Part No: STL36DN6F7) to drive a stepper motor with the following specifications:

• Operating voltage: 24V

• Current/phase: 1.68A

• Holding torque: 0.36 Nm

• Maximum speed: 1500 RPM

The issue I am facing is that when I try to run the motor at or near its maximum speed (1500 RPM), it stalls or stops randomly. I have already configured the TORQUE register to its maximum full-scale current, but the problem persists.  and  Rsense resistor is 0.01Ohm

Could you please help identify the possible factors that might be limiting the performance and preventing the motor from reaching its rated speed from drv8711?

how do i know the max rpm supporting capacity of the drv8711?

Thank you for your support.

Best regards,
Padmaja

Embedded Engineer