• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 280 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:

BQ24070: Can VREF be used to pull input pins high?

BQ24070: Can VREF be used to pull input pins high?

Karthik B
Expert 1310 points
Part Number: BQ24070

Hi,

Adding on to the query raised in the thread (http://e2e.ti.com/support/power-management/f/196/t/680230.)

Can I use the VREF 3.3V output voltage as pull up voltage for the TS, STAT1, STAT2, PG#  open drain pins , along with the MODE, CE as well as ISET2 pin? Because my input voltage( external adapter ) is 12V
and absolute maximum for the TS, STAT1, STAT2, PG# , MODE, CE and  ISET2 is 7V so i cannot pull it up to Input voltage

So confirm on that i can use VREF pin for the pull up purpose, also please suggest what pull up resistor value should i use for this?

Regards,
Karthik

  • 0
    TI__Mastermind 21590 points
    Hello Karthik,
    The VREF pin only supplies 3.3V when VIN is present so the /PG pin will stay low when VIN isn't present if you pull it up to VREF. You also don't want to pull up CE with VREF because VREF is enabled through CE. I'll suggest pulling up the other pins to VOUT which is regulated. Also the maximum current VREF can supply is 20mA.