BQ28Z560-R1 Datasheet, PDF (25/60 Pages) Texas Instruments – Single Cell Li-Ion Battery Gas Gauge and Protection

bq28z560-R1
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SLUSBD3 – APRIL 2013
The AtRate() value is a signed integer with negative values interpreted as a discharge current value. The
AtRateTimeToEmpty() function returns the predicted operating time at the AtRate value of discharge. The default
value for AtRate() is zero and will force AtRateTimeToEmpty() to return 65,535. Both the AtRate() and
AtRateTimeToEmpty() commands should only be used in NORMAL mode.
AtRateTimeToEmpty(): 0x04/0x05
This read-only function returns an unsigned integer value of the predicted remaining operating time if the battery
is discharged at the AtRate() value in minutes with a range of 0 to 65,534. A value of 65,535 indicates AtRate() =
0. The gas gauge updates AtRateTimeToEmpty() within 1 s after the system sets the AtRate() value. The gas
gauge automatically updates AtRateTimeToEmpty() based on the AtRate() value every 1 s. The AtRate() and
AtRateTimeToEmpty() commands should only be used in NORMAL mode.
Temperature(): 0x06/0x07
This read-only function returns an unsigned integer value of the battery temperature in units of 0.1K measured by
the gas gauge.
Voltage(): 0x08/0x09
This read-only function returns an unsigned integer value of the measured cell-pack voltage in mV with a range
of 0 to 6000 mV.
Flags(): 0x0a/0x0b
This read-only function returns the contents of the gas-gauge status register, depicting the current operating
status.
High Byte
Low Byte
Bit 7
OT
OCVTAKEN
Bit 6
OC
ISD
Table 7. Flags Bit Definitions
Bit 5
BATHI
TDD
Bit 4
BATLO
CHGFET
Bit 3
CHG_INH
DSGFET
These fault flags will only clear if the fault condition is removed:
Bit 2
ALRT
SOC1
Bit 1
FC
SOCF
Bit 0
CHG
DSG
OT = Overtemperature in a Charge or Discharge condition is detected. True when set.
OC = Overcurrent in a Charge or Discharge condition is detected. True when set.
BATHI =
Battery High bit indicating a high battery voltage condition. Refer to the data flash BATTERY HIGH parameters for
threshold settings.
BATLO =
Battery Low bit indicating a low battery voltage condition. Refer to the data flash BATTERY LOW parameters for
threshold settings.
CHG_INH = Charge Inhibit indicates the temperature is outside the range [Charge Inhibit Temp Low, Charge Inhibit Temp
High]. True when set.
ALRT = Indicates there is an Alert in the system. True when set.
Full-charged is detected. FC is set when charge termination is reached and FC Set% = –1 (see CHARGING AND
FC = CHARGE TERMINATION INDICATION for details) or State of Charge is larger than FC Set% and FC Set% is not –1.
True when set.
CHG = (Fast) charging allowed. True when set.
OCVTAKEN = Cleared on entry to RELAX mode and set to 1 when OCV measurement is performed in RELAX.
ISD = Internal Short is detected. True when set.
TDD = Tab Disconnect is detected. True when set.
CHGFET= Indicates the state of the firmware CFET control. True when set to 1.
DSGFET= Indicates the state of the firmware DFET control. True when set to 1.
SOC1 = State-of-Charge-Threshold 1 (SOC1 Set) reached. True when set.
SOCF = State-of-Charge-Threshold Final (SOCF Set %) reached. True when set.
DSG = Discharging detected. True when set.
Copyright © 2013, Texas Instruments Incorporated
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