BQ2085 Datasheet, PDF (50/56 Pages) Texas Instruments – SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bq29311

bq2085
SLUS541 – OCTOBER 2002
AFE Integrity Check
AFE Check Time DF 0xe4 sets the period in seconds for the AFE integrity check.
The AFE Fail Limit (DF 0xd3,d4) is the number of AFE integrity check failures that occur before the AFE flag
is set.
Sleep Mode
The sleep current threshold, SLP (mA), is stored in Sleep Current Thresh DF 0xe5 as:
Sleep Current Thresh +
SLP(mA)
0.5
(13)
The wake-up period for current measurement, WAT(s), is set in Sleep Current Time DF 0xe6 as:
Sleep Current Time +
WAT(s)
0.5
(14)
Miscellaneous Configuration
Misc Configuration DF 0x2a contains additional bit programmable features.
b7
b6
b5
b4
b3
b2
b1
b0
IT
0
AC
DS
OT
ECLED
PHG
VOD
IT
The IT bit configures the bq2085 to use its internal temperature sensor.
0 bq2085 requires an external thermistor.
1 bq2085 uses its internal temperature sensor.
AC
The AC bit enables the SAFE output to function based on the AFE integrity check.
0 SAFE is not activated based on the AFE integrity check.
1 SAFE activated based on the AFE integrity check.
DS
The DS bit programs the bq2085 to enter sleep mode on SMBus inactivity.
0 bq2085 enters sleep mode when the SMBus is low for 2 s.
1 bq2085 does not enter sleep mode.
OT
The OT bit programs the bq2085 to turn off the discharge FET when the bq2085 detects an overtemperature
condition. Charge FET is always turned off in overtemperature conditions.
0 bq2085 does not turn off the discharge FET on overtemperature.
1 bq2085 turns off the discharge FET on overtemperature.
ECLED
The ECLED bit programs the LED activity during charging (DSG bit = 0).
0 The LEDs are not enabled during charging.
1 The LEDs are enabled during charging.
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