• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 64 subscribers
  • Views 196 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.

BQ24045: BQ24045 TS function when battery is not existed

Paul Yeh
Genius 14915 points
Part Number: BQ24045

Hi Team,

My customer would like to know how MCU knows the battery is absent? Can they monitor /PG or /CHG  pin signals to judge?

Now they add 250kohm pull-down resistor in TS pin. So when the battery is absent then TS won't connect to NTC.

Please advise.

Thanks

  • 0
    TI__Guru 71166 points

    Hello Paul

    When the battery is absent output will toggle from high to low at a 25mS rate.  Output will supply 4.35V for 25mS and then pull low for 25mS, this can be seen in Figure 26. 

    If the MCU has an ADC it could measure the output voltage and identify this high low cycling.