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BQ25882: BATP and BATN terminal of BQ25882

takahiko yokota
Mastermind 7135 points
Part Number: BQ25882
Other Parts Discussed in Thread: BQ25883

Hi

I have a question about BATP / BATN terminal of BQ25882.
Could you tell me these terminal uses?

Best regards,
Yokota
  • 0
    TI__Guru**** 166956 points

    Hi Yokota,

    BATP and BATN are the remote sense connections to the battery pack.  In CV mode, the charger regulates the voltage across those pins.

    Regards,
    Jeff

  • 0 in reply to Jeff F
    Mastermind 7135 points

    Hi Jeff-san

    Thank you for the reply.
    I think that the sensing accuracy differ by having these terminal or not.
    BQ25882 has these terminal but BQ25883 doesn't have them.
    Are there the descriptions with them differential in datasheet or data?

    Best regards,
    Yokota

  • 0 in reply to takahiko yokota
    TI__Guru**** 166956 points

    Yokota-san,

    The voltage regulation accuracy is not directly related to the point of regulation. For the BQ25883, the point of regulation is between the IC's BAT and GND pins. You can force the BQ25882 to regulate at the BAT and GND pins by connecting BATP and BATN to those pins at the IC.    For the BQ25882 with VBATREG=8.4V, the regulation accuracy is 8.3664V to 8.4336V over -40C to 85C.  For the BQ25883 with VBATREG=8.4V, the regulation accuracy is 8.35V to 8.44V over 0 C to 85C.

    Regards,

    Jeff