• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 64 subscribers
  • Views 170 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.

BQ25890: Status pin function disable

Gary Teng
Genius 5550 points
Part Number: BQ25890

Hi Sir,

 My customer want to disable BQ25890 Status pin function when there's no battery at their product. Controlling STAT_DIS bit workable only in charging statue. Is there any registting can enable/disable Status pin funciton when there's no battery in system?

Best regards,

Gary Teng

  • 0
    TI__Mastermind 26645 points

    Hi Gary, 

    The STAT_DIS bit should still be able to be set when no battery is connected or when charge is disabled. 

    Best Regards,

    Garrett 

  • 0 in reply to Garrett Kreger
    Genius 5550 points

    Hi Garrett,

     By customer's response,

    1. They can't disable stat pin function by setting bit6 in REG06 or bit4 in REG03.

     2. When the DC in is removed, the STAT pin will stop blinkin 30s and start again and stop.... is this the correct condition?

    Regards,

    Gary

  • 0 in reply to Gary Teng
    TI__Mastermind 26645 points

    Hi Gary, 

    Gary Teng said:
    They can't disable stat pin function by setting bit6 in REG06 or bit4 in REG03.

    STAT_DIS bit is bit 6 in REG07. Bit 6 in REG06 or bit 4 in REG03 will not disable STAT pin. 

    I have confirmed STAT_DIS bit works as expected with no battery connected. Based on the waveform provided it appears STAT pin is becoming re-enabled due to the watchdog timer expiring.

    Watchdog expiration would explain why they see the expected behavior for approx. 30 sec. For STAT to remain disabled they will need to disable the watchdog timer via REG07 or continually reset the watchdog timer before it expires to avoid STAT_DIS being reset to 0b.

    Best Regards,

    Garrett