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Original question:

DRV110: what does I peak mean of DRV110

DRV110: what is the DRV1100 keep time tolerance

?? ?
Prodigy 110 points
Part Number: DRV110

Tool/software:

hi team,

 I met  a problem,  the  Tkeep  is different  in  two samples，  the Ckeep is the same（I measured  with LCR） but  the solenoid  peak current keep time  is different； I exchange  the DRV110 chip  from one sample to annother， the keep time   follows  the chip； I want to know  how much  is the  Tkeep  tolerance  between  differnce DRV110?  thanks！

 sample 1：

sample 2：

  • 0
    TI__Mastermind 39065 points

    Hi,

    Thank you for your questions. Our expert will feedback to you within a day or two

  • 0
    TI__Genius 16430 points

    Hello,

    Are you evaluating on a DRV110EVM and swapping out the DRV110 between tests or testing from 2 separate boards?

    Best,

    David

  • 0 in reply to David Medis
    Prodigy 110 points

    hi，  I swapping DRV110  btween  our own designed  boards， I do not have  a DRV110 EVM

  • 0 in reply to ?? ?
    TI__Genius 16430 points

    Hello,

    I don't believe there is much variation between the devices. We don't have that exact data on this device.

    How many units have you seen this variation with?

    Is this time variation causing some issues with the application? 

    Best,

    David

  • 0 in reply to David Medis
    Prodigy 110 points

    hi   I test about 7 boards， four  boads   are 189ms      three  boards  are  170ms   174ms    172ms；

    yes ，in our application， we need a accurate time  to  open the  solenoid 

  • 0 in reply to ?? ?
    TI__Mastermind 23260 points

    Hello,

    I have reached out to some other team members to see if we can get a spec on keep time.  

    Is this a new project?  Would you consider a Half-bridge device like DRV8952 - it has integrated current regulation so you can set your desired current regulation level for peak and hold capability, and by controlling IN1 and the current regulation with your MCU directly you will have very tight timing control.  Another option would be DRV8143-Q1 for a single channel device. This route will likely be cheaper than DRV110.

    Best,

    Jacob

  • 0 in reply to Jacob Thompson
    Prodigy 110 points

    hi

     it is a old project, I think it hardly  replace DRV110 with other chip;

  • +1 in reply to ?? ?
    TI__Genius 16430 points

    Hello, 

    We've just heard back from our design team and they've confirmed that we don't have this data. This is due to the device being one of our older products in our portfolio. 

    From what we have seen across our products, there is more than likely an estimated 20% of variance between devices. This doesn't mean that each device will have a 20% variance, but across the total distribution of devices any are possible to fall within 20% of typical spec.

    Best,

    David