BQ2040 Datasheet, PDF (31/33 Pages) Texas Instruments – Gas Gauge IC With SMBus Interface

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