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bq76930 current consumption

Maria Luisa Sanchez Maizer
Prodigy 30 points
Other Parts Discussed in Thread: BQ76930


Greetings:

I am using the BQ76930 with a 6-cell LiPo battery. The components seems to be functioning well, but it consumes unexpected amount of current in the SHIP mode. Measured with a multimeter, the consumption in NORMAL mode was: 90 to 90uA (which is expected). But the consumption in SHIP mode is 270uA.

I have already checked the rest of the design, there is no shortcircuit and the battery is fine. Why is the component consuming so much current.

Thanks for your time

Maria Luisa

  • 0
    TI__Guru 54715 points
    Perhaps the part is broken or put into some unusual mode rather than ship. Check which pin the current goes into the IC or the circuit. If you have an MCU attached, is it still powered? If still powered can you read registers? If you can read registers it is not in ship mode. Also check the REGOUT voltage. I2C pull-ups should not power the part, if ALERT is held high it may feed back into the power supply and prevent ship mode.
  • 0 in reply to WM5295
    Prodigy 30 points

    Thanks for the answer. I have checked all your parameters, they are fine. The 270uA of consumption was not in the Normal mode, it was the current while BOOT was connected. The Normal mode consumption is between acceptable parameters.