BQ2063_15 Datasheet, PDF (15/60 Pages) Texas Instruments – SBS v1.1-COMPLIANT Li-ION GAS-GAUGE IC

Not Recommended For New Designs
bq2063
SBS v1.1ĆCOMPLIANT LiĆION GASĆGAUGE IC
WITH PROTECTOR INTERFACE
SLUS468E− MAY 2001 − REVISED APRIL 2002
primary charge termination (continued)
Once the bq2063 detects a primary charge termination, the bq2063 sets the
TERMINATE_CHARGE_ALARM and FULLY_CHARGED bits in BatteryStatus( ), and sets the
ChargingCurrent( ) to the maintenance charge rate as programmed in Maintenance Charging Current EE
0x1d. On termination, the bq2063 also sets RM to a programmed percentage of FCC, provided that
RelativeStateOfCharge( ) is below the desired percentage of FCC and the CSYNC bit in Pack Configuration
EE 0x3f is set. The programmed percentage of FCC, Fast Charge Termination %, is set in EE 0x4b. The
bq2063 clears the FULLY_CHARGED bit when RelativeStateOfCharge( ) is less than the programmed
Fully Charged Clear %. The bq2063 broadcasts the fast-charge rate when the FULLY_CHARGED bit is
cleared and voltage and temperature permit. The bq2063 clears the TERMINATE_CHARGE_ALARM
when it no longer detects that the battery is being charged or it no longer detects the termination condition.
See Table 5 for a summary of BatteryStatus( ) alarm and status bit operation.
Table 5. Alarm and Status Bit Summary
BATTERY STATE
CONDITIONS
CC( ) CURRENT AND
STATUS BITS SET
STATUS CLEAR CONDITION
Overcurrent
C( ) ≥ CC( ) + Overcurrent Margin
CC( ) = 0, TCA = 1
C( ) < Overcurrent Margin
Prolonged
overcurrent
AC( ) ≥ Fast-Charging Current +
Overcurrent Margin
CVOV = 1
CC( ) = 0, TCA = 1
AC( ) < 256 mA
Overload
AC( ) ≤ −Overload Current
CVUV = 1
AC( ) ≥ –256 mA
Overvoltage
V( ) ≥ CV( ) + Overvoltage Margin
VCELL1, 2, 3, or 4 ≥ Cell Over Voltage
TCA = 1
CC( ) = 0, CVOV = 1
DISCHARGING = 1
V( ) < CV( ) + Overvoltage Margin
VCELL(all) ≤ Cell Over Voltage
Overtemperature T( ) ≥ Max T
CC( ) = 0, OTA = 1,
TCA = 1, CVOV = 1
T( ) ≤ Max T - 5°C or T( ) ≤ 43°C
Overcharge
Capacity added after RM( ) = FCC( ) ≥
Maximum Overcharge
CC( ) = 0, FC = 1
OCA = 1, TCA = 1
RSOC( )< Fully Charged Clear %
DISCHARGING = 1
T( ) < 0°C
Undertemperature
0°C ≤ T( ) < LTF
CC( ) = 0
0°C ≤ T( )
CC( ) = Pre-Charge Current T( ) ≥ LTF
Primary charge
termination
Current taper
FC = 1
CC( ) = Maintenance
Charging Current
RSOC( ) < Fully Charged Clear%
Fully discharged
RM( ) < Battery Low % and
DISCHARGING = 1
FD = 1
RSOC( ) ≥ 20%
Overdischarged
RM( ) = 0
V( ) or VCELL1, 2, 3, or 4 ≤ EDV0
VCELL1, 2, 3 or 4 < Cell Under Voltage
TDA = 1
TDA = 1, CVUV = 1
V( ) or VCELL(all) > EDV0 and RM( ) > 0
V( ) > EDV0
VCELL(all) ≥ Cell Under Voltage
Low capacity
RM( ) < RCA( )
RCA = 1
RM( ) ≥ RCA( )
Low run time
ATTE( ) < RTA( )
RTA = 1
ATTE( ) ≥ RTA( )
NOTE: AC( ) = AverageCurrent( ), C( ) = Current( ), CV( ) = ChargingVoltage( ), CC( ) = ChargingCurrent( ), V( ) = Voltage( ),
T( ) = Temperature( ), TCA = TERMINATE_CHARGE_ALARM, OTA = OVER_TEMPERATURE_ALARM,
OCA = OVER_CHARGED_ALARM, TDA = TERMINATE_DISCHARGE_ALARM, FC = FULLY_CHARGED,
FD = FULLY_DISCHARGED, RSOC( ) = RelativeStateOfCharge( ). RM( ) = RemainingCapacity( ),
RCA = REMAINING_CAPACITY_ALARM, RTA = REMAINING_TIME_ALARM, ATTE( ) = AverageTimeToEmpty( ),
RTA( ) = RemainingTimeAlarm( ), RCA( ) = RemainingCapacityAlarm( ). LTF = Low Temperature Fault threshold
FCC( ) = Full Charge Capacity
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