BQ27620-G1 Datasheet, PDF (14/45 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

bq27620-G1
SLUSAE3 – OCTOBER 2012
www.ti.com
4.1.1.3 Temperature( ): 0x06/0x07
This read-/write-word function returns an unsigned integer value of the temperature in units of 0.1 K
measured by the fuel gauge. If [WRTEMP] bit = 1, a write command sets the temperature to be used for
gauging calculations while a read command returns to temperature previously written. If [WRTEMP] bit = 0
and [TEMPS] bit = 0, a read command will return the internal temperature sensor value.
4.1.1.4 Voltage( ): 0x08/0x09
This read-word function returns an unsigned integer value of the measured cell-pack voltage in mV with a
range of 0 to 6000 mV.
4.1.1.5 Flags( ): 0x0a/0x0b
This read-word function returns the contents of the fuel-gauge status register, depicting the current
operating status.
Table 4-4. Flags Bit Definitions
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
High byte
OTC
OTD
–
CALEN
CHG_INH
XCHG
FC
CHG
Low byte
–
–
OCVGD
NEEDID
BATTDET
SOC1
SYSDOWN
DSG
OTC = Overtemperature in charge condition is detected. True when set. SOC_INT will toggle once if set.
OTD = Overtemperature in discharge condition is detected. True when set. SOC_INT will toggle once if set.
CALEN = Status bit indicating the calibration function is enabled. True when set.
CHG_INH = Charge inhibit: unable to begin charging (temperature outside the range [Charge Inhibit Temp Low, Charge Inhibit Temp
High]). True when set.
XCHG = Charge suspend alert (temperature outside the range [Suspend Temperature Low, Suspend Temperature High]). True when
set.
FC = Full-charged condition reached. Set when charge termination condition is met. (RMFCC=1; Set FC_Set % = -1% when RMFCC = 0).
True when set
CHG = (Fast) charging allowed. True when set.
OCVGD = Good OCV measurement taken. True when set.
NEEDID = Waiting to identify inserted battery. True when set.
BATTDET = Battery detected. True when set.
SOC1 = State-of-charge threshold 1 (SOC1 Set) reached. The flag is enabled when BL_INT bit in Operation Configuration B is set. True
when set.
SysDown = SystemDown bit indicating the system shut down. SOC_INT will toggle once if set.
DSG = Discharging detected. True when set.
4.1.1.6 NominalAvailableCapacity( ): 0x0c/0x0d
This read-only command pair returns the uncompensated (less than C/20 load) battery capacity
remaining. Units are mAh.
4.1.1.7 FullAvailableCapacity( ): 0x0e/0x0f
This read-only command pair returns the uncompensated (less than C/20 load) capacity of the battery
when fully charged. Units are mAh. FullAvailableCapacity( ) is updated at regular intervals, as specified by
the IT algorithm.
4.1.1.8 RemainingCapacity( ): 0x10/0x11
This read-only command pair returns the remaining battery capacity which is compensated for the present
conditions of load, temperature and battery age. RemainingCapacity( ) is typically lower than the
uncompensated NominalAvailableCapacity( ). Units are mAh.
4.1.1.9 FullChargeCapacity( ): 0x12/13
This read-only command pair returns the capacity of the battery when fully charged with compensation for
the present conditions of temperature and battery age. FullChargeCapacity( ) is updated at regular
intervals, as specified by the IT algorithm typically lower than the uncompensated
FullAvailableCapacity( )and . Units are mAh.
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GENERAL DESCRIPTION
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