Datasheet

31
bq2040
Ordering Information
bq2040
Package Option:
SN = 16-pin narrow SOIC
Device:
bq2040 Gas Gauge IC With SMBus Interface
Temperature Range:
blank = Commercial (0 to 70°C)
ChangeNo. Page No. Description of Change
3 3 Updated recommended application schematic.
3 9 Changed overcurrent fault conditon for ChargingCurrent < 1024mA.
3 10 4Hz operation of LED clarification.
3 11 Added descriptions for bits 7 and 13 of BatteryMode.
3 14 AtRateTimeToEmpty and AtRateTimeToFull invalid data indication correction.
3 15, 16
RunTimeToEmpty, AverageTimeToEmpty and AverageTimeToFull invalid data
indication corrections.
3 23 Changed typical Battery low % value for Li-Ion with EDV1 = 3.0V/cell.
3 24 Li-Ion taper current is stored in 2’s complement.
324
Changed typical ∆T step and Full-charge percentage for Li-Ion.
3 25 Voltage gain is (R4 + R5)/R4.
3 25 Changed typical EDV1 and EDVF values for Li-Ion.
4 6 Added V
SB
should not exceed 2.4V
4 8 The self discharge rate approx imately doubles or halves
4 11 Changed cycle count increase from 30 to 32 for condition request.
4 14 Changed AtRateOK() indication from EDV1 to EDVF
4 25 Changed self-discharge programming from 52.75/x to 52.73/x.
4 25 Changed recommended EDVF charging current from 0mA to 100mA
Notes: Changes 1 and 2 refer to the 1998 Data Book
Change 3 = June1998 D changes from Jan. 1998 C.
Change 4 = June 1999 E changes from June 1998 D.
Data Sheet Revision History