BQ27620-G1 Datasheet, PDF (16/45 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

bq27620-G1
SLUSAE3 – OCTOBER 2012
www.ti.com
4.1.1.18 AveragePower( ): 0x24/0x25
This read-only function returns an signed integer value of the average power during battery charging and
discharging. It is negative during discharge and positive during charge. A value of 0 indicates that the
battery is not being discharged. The value is reported in units of mW.
4.1.1.19 TimeToEmptyAtConstantPower( ): 0x26/0x27
This read-only function returns an unsigned integer value of the predicted remaining operating time if the
battery is discharged at the AveragePower( ) value in minutes. A value of 65,535 indicates
AveragePower( ) = 0. The fuel gauge automatically updates TimeToEmptyatContantPower( ) based on the
AveragePower( ) value every 1 s.
4.1.1.20 StateofHealth( ): 0x28/0x29
0x28 SOH percentage: this read-only function returns an unsigned integer value, expressed as a
percentage of the ratio of predicted FCC(25°C, SOH LoadI) over the DesignCapacity(). The FCC(25°C,
SOH LoadI) is the calculated full charge capacity at 25°C and the SOH LoadI which is specified in the
data flash. The range of the returned SOH percentage is 0x00 to 0x64, indicating 0 to 100%
correspondingly.
0x29 SOH Status: this read-only function returns an unsigned integer value, indicating the status of the
SOH percentage. The meanings of the returned value are:
• 0x00: SOH not valid (initialization)
• 0x01: SOH initial value for unidentified pack
• 0x02: SOH final value, pack identified
4.1.1.21 CycleCount( ): 0x2a/0x2b
This read-only function returns an unsigned integer value of the number of cycles that the active cell has
experienced with a range of 0 to 65535. One cycle occurs when accumulated discharge ≥ CC Threshold.
The gauge maintains a separate cycle counter for both cell profiles and will reset to zero if the insertion of
a new pack has been detected.
4.1.1.22 StateOfCharge( ): 0x2c/0x2d
This read-only function returns an unsigned integer value of the predicted remaining battery capacity
expressed as a percentage of FullChargeCapacity( ), with a range of 0 to 100%.
4.1.1.23 InternalTemperature( ): 0x36/0x37
This read-only function returns an unsigned integer value of the internal temperature sensor in units of 0.1
K measured by the fuel gauge. This function can be useful as an additional system-level temperature
monitor if the main Temperature( ) function is configured for external or host reported temperature.
4.1.1.24 OperationConfiguration( ): 0x3a/0x3b
This read-only function returns the contents of the data flash Operation Configuration register and is
most useful for system level debug to quickly determine device configuration.
4.1.1.25 ApplicationStatus(): 0x6a/0x6b
This read-only function returns the contents of the data flash Host Cfg register.
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GENERAL DESCRIPTION
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