DRV2605L: Auto-Calibration Failing to Lock

Hi Aaron,

Thanks for reaching out. I suggest adjusting the registers associated with the automatic-resonance detection engine as this helps with auto calibration failures seen with LRAs. They are listed in 8.5.1 in the DRV2605L datasheet. I have found that increasing IDISS_TIME[3:0] and  BLANKING_TIME[3:0] helps as it allows more time for the LRA to get to the correct state before taking the calibration measurements. 

Regards,
Sydney Northcutt 

HI,

Thanks for the reply.

Any suggestions on how to increase them? Should i just start increasing each parameter one step at a time and see if it helps? Or is them a better method?

Thanks

Aaron

Hi Aaron,

There is not a particular method that is better. These values are subject to the LRAs composition, so it takes some trial and error to find what works best.

Regards,
Sydney Northcutt  

Hi Sydney,

I have tried all different combinations of IDISS and BLANKING TIME with no luck. Any pointers on what to try next? I can share the datasheet of the actuator but do not want to do this publicly if it is useful - how can i do this?

Thanks

Aaron

Hi Aaron,

I will email you to start a thread, and then you can share the datasheet.

Regards,
Sydney Northcutt