BQ2063_15 Datasheet, PDF (30/60 Pages) Texas Instruments – SBS v1.1-COMPLIANT Li-ION GAS-GAUGE IC

bq2063
Not Recommended For New Designs
SBS v1.1ĆCOMPLIANT LiĆION GASĆGAUGE IC
WITH PROTECTOR INTERFACE
SLUS468E− MAY 2001 − REVISED APRIL 2002
command codes (continued)
Temperature( ) (0x08); [0x08]
Description: Returns the temperature (K) measured by the bq2063.
Purpose: The Temperature( ) function provides accurate cell temperatures for use by battery chargers and
thermal management systems. A battery charger can use the temperature as a safety check. Thermal
management systems may use the temperature because the battery is one of the largest thermal sources in
a system.
SMBus Protocol: Read Word
Output: Unsigned integer—cell temperature in tenth-degree Kelvin increments.
Units: 0.1°K
Range: 0 to +6553.5°K {real range}
Granularity: 0.1°K
Accuracy: ±1.5°K (from ideal Semitec 103AT thermistor performance, after calibration)
±3.0°K (Internal temperature sensor after calibration)
Voltage( ) (0x09); [0x09]
Description: Returns the cell-pack voltage (mV).
Purpose: The Voltage( ) function provides power management systems with an accurate battery terminal
voltage. Power management systems can use this voltage, along with battery current information, to
characterize devices they control. This ability helps enable intelligent, adaptive power-management systems.
SMBus Protocol: Read Word
Output: Unsigned integer-battery terminal voltage in mV.
Units: mV
Range: 0 to 20,000 mV
Granularity: 1 mV
Accuracy: ±0.65% (after calibration)
Current( ) (0x0a); [0x0a]
Description: Returns the current being supplied (or accepted) by the battery (mA).
Purpose: The Current( ) function provides a snapshot for the power management system of the current flowing
into or out of the battery. This information is of particular use in power-management systems because they can
characterize individual devices and tune their operation to actual system power behavior.
SMBus Protocol: Read Word
Output: Signed integer-charge/discharge rate in mA increments-positive for charge, negative for discharge.
Units: mA
Range: (± 250mV/R_S) mA
Granularity: 0.038mV/R_S (integer value)
Accuracy: ±0.4 mV/R_S (after calibration)
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