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BQ25792: Same I2C Address as BQ25703A

Gelo
Prodigy 30 points
Part Number: BQ25792
Other Parts Discussed in Thread: BQ76952EVM

We have the following DKs to be configured/controlled by a single MCU through one I2C bus:

  • BQ25792EVM
  • BQ25703AEVM
  • BQ76952EVM

However, we are facing issues integrating the two charger DKs, since both of them have the same I2C address (D6/6B).

Is there any way to put all three on the same I2C bus without I2C issues? A separate I2C bus is not an option.

Thanks!

  • +1
    TI__Guru**** 165886 points

    Hi Angelo,

    I don't see a way to do that unless you add switches to physically connect/disconnect the I2C lines to each device as needed.

    Regards,

    Jeff

  • 0 in reply to Jeff F
    Prodigy 30 points

    Hi Jeff,

    Thanks, I was hoping that the I2C address is somehow configurable through HW (at bootup) or registers. From their datasheets, it seems that its not possible for either of the chargers. We might need to use an I2C multiplex chip, or an address translator chip or allocate another I2C bus on the MCU side for our POC.

    Cheers,
    Angelo