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DRV2605 - pwm

sanket dave
Prodigy 10 points
Other Parts Discussed in Thread: DRV2605

In the datasheet, under PWM input mode it reads "The DRV2605 drives the actuator continuously in this mode until the user sets the device into STANDBY mode". 

I am unable to understand this logic. What is the point of having PWM if we have to set the device in STANDBY mode to turn off the pwm ? I get a continuous pwm pulse which is undesired. Should'nt this be operated based on duty cycle?

  • 0
    TI__Genius 9670 points

    Dave,

    The function of the STANDBY bit is to shutdown the output stage of the driver.  The comment is saying that if you put the device in to STANDBY mode that the input PWM signal will be ignored.  Read the other way, when the part is not in STANDBY mode, the PWM pin has full control of the output amplitude. 

    To answer your question, the PWM mode uses the duty cycle to determine the amplitude of the output.  See the datasheet for more information on what each duty-cycle represents, because it depends on the register settings.

    Thanks,
    Brian