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BQ25120F3A: SDA/SCL driving current ability

Jeff YANG
Genius 5005 points
Part Number: BQ25120F3A
Other Parts Discussed in Thread: BQ25120A

Hi,

I only find BQ25120F3A note need use 10k pull up on SDA/SCL pin.

Does there have any information about SDA/SCL driving current ability?

Thanks!

Jeff

  • 0
    TI__Genius 12475 points

    Hi Jeff,

    The BQ25120A does not drive the SCL pin and can only pull low on SDA pin. 2kohm is what I have seen on the lower end while you can use upto 20kohm on the higher end. It also depends on the voltage you are driving at and the bus frequency from the microcontroller.

    The I2C bus will need to be pulled up to SYS rail from the DC-DC converter. 

     Regards,

    Gautham