8.4.2.3 Current Measurements

The current measurement is performed by measuring the voltage drop across the external sense resistor (1 mΩ

to 3 mΩ) and the polarity of the differential voltage determines if the cell is in the CHARGE or DISCHARGE

mode.

8.4.2.4 Auto Calibration

The auto-calibration feature helps to cancel any voltage offset across the SRP and SRN pins for accurate

measurement of the cell voltage, charge/discharge current, and thermistor temperature. The auto-calibration is

performed when there is no communication activity for a minimum of 5 s on the bus lines.

8.4.2.5 Temperature Measurements

This device has an internal sensor for on-die temperature measurements, and the ability to support external

temperature measurements via the external NTC on the TS1 pin. These two measurements are individually

enabled and configured.

BQ28Z610-R1

SLUSE07B – JANUARY 2020 – REVISED JANUARY 2022

www.ti.com

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