Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

  • State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 64 subscribers
  • Views 600 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Supply Current for BQ76PL536A

Hidetoshi Matsunami
Expert 2750 points
Other Parts Discussed in Thread: BQ76PL536A

Hello Teams,

I suppose that the amount of communication is different in each of stuck(top, middle, bottom) if BQ76PL536A is used in bellow configuration.

Is there a difference in the supply current of each device(top, middle, bottom)?

Best Regards,

Hidetoshi Matsunami

  • 0
    TI__Genius 10785 points
    Hello Hidetoshi-san,

    Yes, it’s possible to see imbalance between stacked ICs but if you calculate average current then it may not be as bad as you think.
    PL536A has fast adc conversion time which is 6uS per channel.
    If you monitor every 50mS then delta should be minimal.
    1. ADC conversion for 6 channels, Vbat,2 temp is 54uS.
    2. It would take 3.52 mS to read 10 devices with 500Khz. It will be faster with 1Mhz.
    3. Rest of ~46mS will be in either Idle or sleep mode.

    You can calculate average current and compare to your cell capacity. What is your cell capacity? How often you monitor cells?
    If you provide then I can try to give you some ideas.

    thanks
  • 0 in reply to Roger Hwang
    Expert 2750 points

    Hello Roger,

    Thank you for your reply.

    I'll contact you after I get cell capacity value and cell monitoring frequency.

    Best Regards,

    Hidetoshi Matsunami

  • 0 in reply to Hidetoshi Matsunami
    TI__Genius 10785 points
    Sure,
    I will wait for your respond.