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BOOST-DRV8711: what is the response time of DRV8711 to reach position ?

M.Sivakumar
Prodigy 100 points
Part Number: BOOST-DRV8711
Other Parts Discussed in Thread: DRV8711

Hi, How long time the DRV8711 took to execute step move?

Lets take an example,

Configuration: 16 - usteps, speed - 240 RPM with no_load, step_index input - 4. How long should wait to read encoder feedback after given the step index pulse?

  • 0
    TI__Guru** 114905 points
    Hi M.Sivakumar,

    The DRV8711 responds to the STEP input within ~2us. After that, there are too many unknowns to provide an answer, such as:
    the motor parameters (the inductance affects the time to reach the next current step)
    the encoder performance (how much resolution and the response time)
    the motor load (at no load the stepper can exceed the final position and oscillate until the final position is reached; under load the oscillation is dampened)
    the system voltage (the higher the voltage, the faster the next current step can be reached)
    the motor speed

    It may be best to measure the settling time empirically.
  • 0 in reply to Rick Duncan
    Prodigy 100 points
    Thanks a lot Rick.