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DRV2605L: time sequence

Part Number: DRV2605L

Hi Team,

Could you help me understand the time sequence of DRV2605L? 

The IDISS_TIME, BLANKING_TIME, ZC_DET_TIME, SAMPLE_TIME; IDISS_TIME would be at first, BLANKING_TIME would follow it; How about the ZC_DET_TIME and SAMPLE time, what's the relationship of them?

I using scope to measure those time, below is the figure. IDISS time is 25us, Blanking time is 25us, sample time is 300us; ZC_DET_TIME is 100us, could you help me understand the following figure?

Thanks and Best Regards,

Will

  • Hi Will,

    Our team will take a look at your questions and reply as soon as possible.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators

  • Hi Salazar,

    Thanks, I'm waiting update from your side.

    Regards,

    Will

  • Hi, Will,

    Do you still need support on this?

    It is hard to show these parameters in the picture that you attached. I will give you some explanations of each of them below. Let me know if you have questions on this.

    IDISS_TIME: It is the time allowed for the current to dissipate from the actuator between PWM cycles for flyback mitigation.

    BLANKING_TIME: The DRV2605L waits for a blanking time of the signal to settle before the back-EMF analog to digital (AD) conversion. This operation ocurres after the current in the actuator dissipates.

    ZC_DET_TIME: This is the zero-crossing detect time. When the blanking time expires, the back-EMF AD monitors the zero crossings. This parameter controls the minimum time allowed to detect zero-crossings.

    SAMPLE_TIME: This is the time that the DRV2605L takes to sample the back-EMF.

    Best regards,
    Luis Fernando Rodríguez S.