• State TI Thinks Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 2 answers
  • Subscribers 63 subscribers
  • Views 487 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

Original question:

BQ25155: JEITA operation by measuring battery temperature via ADCIN

BQ25155: review

kevin.huang_FJXM
Expert 2925 points
Part Number: BQ25155

Please check the schematic diagram

  • 0
    TI__Mastermind 21590 points

    Hello,

    do you not plan on using the LDO? You have VINLS grounded which is the input for LDO. If you don't need LDO, you can ground LDO pin also.

    The device exits shipmode automatically when VIN is plugged in so you don't need to connect a FET gated by VIN to /MR. You can just connect a pushbutton to /MR.

    I would like to confirm that PMID is not connected to battery. Also, what are the purpose of the inductors on PMID?

  • 0 in reply to Raheem
    Expert 2925 points

    1.do you not plan on using the LDO?

    :If so, we ground the LDO as well.

    2. The device exits shipmode automatically when VIN is plugged in so you don't need to connect a FET gated by VIN to /MR. You can just connect a pushbutton to /MR.

    :Button has other functions, so it is still connected in this way

    3.I would like to confirm that PMID is not connected to battery. Also, what are the purpose of the inductors on PMID?:PMID is not connected to the battery, and the inductance is reserved for EMC. At present, 0r resistance is actually pasted

  • 0 in reply to kevin.huang_FJXM
    TI__Mastermind 21590 points

    Great. Those we all my concerns

  • 0 in reply to Raheem
    Expert 2925 points

    Sharafadeen Raheem:

    About adcin NTC resistance placement position, please help to confirm

    A. Place in the place with the lowest PCB temperature: similar to the battery interface,

    B. Other places

  • 0 in reply to kevin.huang_FJXM
    TI__Mastermind 21590 points

    Hello,

    This will depend on what you intend to do with the measurement. Note that the maximum voltage that can be measured on ADCIN is 1.2V. You can remove the pullup to VBAT and set ADCIN to current source mode.