BQ2084-V140_14 Datasheet, PDF (58/64 Pages) Texas Instruments – SBS v1.1-COMPLIANT GAS GAUGE FOR USE WITH THE bq29312

bq2084-V140
SLUS664B – JULY 2005 – REVISED AUGUST 2006
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Device Chemistry Data
Device Chemistry Length DF 0x22 stores the length of the desired string that is returned by the
DeviceChemistry() function. Locations DF 0x23-0x26 store the characters for DeviceChemistry() in ASCII code.
Manufacturers Data Length
Manufacturers Data Length DF 0x27 stores the length of the desired number of bytes that is returned by the
ManufacturersData() function. It should be set to 9.
Temperature Limits
The limits described below are extensions to those limits detailed in the safety and charging sections of this data
sheet.
Charge Suspend Temp Low
Charge Suspend Temp Low DF 0x79 sets the lowest temperature, in degrees C/10, at which normal operation is
allowed. If the temperature falls below this limit, the pack goes into a temporary failure state, the charge FET is
turned off, and the MAC status is set to system present. It is cleared when the pack warms, or the pack is
removed.
Charge Inhibit Temp Low
Charge Inhibit Temp Low DF 0x46 inhibits charging by setting ChargingCurrent() and ChargingVoltage() to 0
and turn off the CHG FET. It is programmed in degrees C/10 and the range of -12.8°C to 12.7°C.
Charge Inhibit Temp High
Charge Inhibit Temp High DF 0x47 - 0x48 inhibits charging by setting ChargingCurrent() and ChargingVoltage()
to 0
Charge Suspend Temp High
Charge Suspend Temp High DF 0x6d-0x6e sets the highest temperature, in degrees C/10, at which charging
will be allowed to continue. If this temperature is exceeded during charging, the pack goes into a temporary
failure state, and the MAC status is set to system present. It is cleared when the pack cools below
OverTemperature Charge Reset, or ac adapter is removed, or the pack is removed. Charging can only resume
when the temperature returns to within the charge start temperature limits.
Charge Suspend Temp High Reset
Charge Suspend Temp High Reset DF 0x6f-0x70 sets the temperature, in degrees C/10, at which the pack
recovers from Charge Suspend Temp High fault.
Over Temperature Discharge
Over Temperature Discharge DF 0x71-0x72 sets the highest temperature, in degrees C/10, at which discharging
will be allowed. If the pack exceeds this temperature, charge and discharge FETs are turned off, and MAC
status is set to system present. The pack returns to normal operation when the temperature falls below Over
Temperature Discharge Reset, or if the pack is removed.
Over Temperature Discharge Reset
Over Temperature Discharge Reset DF 0x73-0x74 sets the temperature, in degrees C/10, at which the pack will
recover from Over Temperature Discharge Over temperature will also reset when the pack is removed from the
system if not in the non-removable mode.
Failure Detection Thresholds
Safety OverTemperature Charge
Safety OverTemperature Charge DF 0x75-0x76 sets the temperature, in degrees C/10, above which, during
charging, the pack enters permanent failure, if the XSOTC bit in Permanent Failure Configuration is set.
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