BQ25882: BATP and BATN terminal of BQ25882

takahiko yokota

Mastermind 7135 points

Part Number: BQ25882
Other Parts Discussed in Thread: BQ25883

I have a question about BATP / BATN terminal of BQ25882.

Could you tell me these terminal uses?

Best regards,

Yokota

over 6 years ago

0 Jeff F over 6 years ago

TI__Guru**** 167196 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 takahiko yokota over 6 years ago 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 Jeff F over 6 years ago in reply to takahiko yokota

TI__Guru**** 167196 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

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BQ25882: BATP and BATN terminal of BQ25882