BQ28Z560-R1 Datasheet, PDF (27/60 Pages) Texas Instruments – Single Cell Li-Ion Battery Gas Gauge and Protection

bq28z560-R1
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SLUSBD3 – APRIL 2013
MaxLoadTimeToEmpty(): 0x20/0x21
This read-only function returns an unsigned integer value of the predicted remaining battery life at the maximum
load current discharge rate, in minutes. A value of 65,535 indicates that the battery is not being discharged.
AvailableEnergy(): 0x22/0x23
This read-only function returns an unsigned integer value of the predicted charge or energy remaining in the
battery. The value is reported in units of mW (Design Energy Scale = 1) or cW (Design Energy Scale = 10).
AveragePower(): 0x24/0x25
This read-word function returns an unsigned integer value of the average power of the current discharge. 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 (Design Energy Scale = 1) or cW (Design Energy
Scale = 10).
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 gas
gauge automatically updates TimeToEmptyatConstantPower() based on the AveragePower() value every 1 s.
Internal_Temp(): 0x28/0x29
This read-only function returns an unsigned integer value of the measured internal temperature of the device in
units of 0.1K measured by the gas gauge.
CycleCount(): 0x2a/0x2b
This read-only function returns an unsigned integer value of the number of cycles the battery has experienced
with a range of 0 to 65,535. One cycle occurs when accumulated discharge ≥ CC Threshold.
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%.
StateOfHealth(): 0x2e/0x2f
0x2E SOH percentage: This read-only function returns an unsigned integer value, expressed as a percentage of
the ratio of predicted FCC(25°C, SOH current rate) over the DesignCapacity(). The FCC(25°C, SOH current rate)
is the calculated full charge capacity at 25°C and the SOH current rate, which is specified in the data flash (State
of Health Load). The range of the returned SOH percentage is 0x00 to 0x64, indicating 0 to 100%,
correspondingly.
PassedCharge(): 0x34/0x35
This signed integer indicates the amount of charge passed through the sense resistor since the last Impedance
Track simulation in mAh.
DOD0(): 0x36/0x37
This unsigned integer indicates the depth of discharge during the most recent OCV reading.
SelfDischargeCurrent(): 0x38/0x39
This read-only command pair returns the signed integer value that estimates the battery self discharge current.
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