BQ2084-V140_14 Datasheet, PDF (55/64 Pages) Texas Instruments – SBS v1.1-COMPLIANT GAS GAUGE FOR USE WITH THE bq29312

bq2084-V140
www.ti.com
SLUS664B – JULY 2005 – REVISED AUGUST 2006
1 Safety overvoltage based on highest cell voltage multiplied by the number of cells and then compared
to the safety voltage.
VCOR
The VCOR bit enables the midrange voltage correction algorithm. When it is set, the bq2084-V140 compares
the pack voltage to RM and may adjust RM according to the values programmed in VOC25, VOC50, and
VOC75.
0 Continuous midrange corrections disabled
1 Continuous midrange corrections enabled
OTVC
The OTVC bit programs the bq2084-V140 to perform a midrange voltage one time after a device reset
0 One-time midrange correction disabled
1 One-time midrange correction enabled
Miscellaneous Configuration
Misc Configuration DF 0x2a (high) and 0x2b (low) contains additional bit programmable features.
Misc Configuration (high) DF 0x2a
b15
b14
b13
b12
b11
b10
b9
b8
IT
0
AFEDET
DS
OT
ECLED
1
VOD
IT
The IT bit configures the bq2084-V140 to use its internal temperature sensor. The DF constants 0xb5-0xc0
need to match the required thermistor on internal temperature sensor. See the Data Flash Settings for Internal
or External Temperature Sensor Table.
0 bq2084-V140 requires an external thermistor.
1 bq2084-V140 uses its internal temperature sensor.
AFEDET
The AFEDET bit programs the bq2084-V140 to look for errors with I²C communications and the AFE and
enables the detection of the AFE permanent failure if bit 3 of PF Config 0x11f is set.
0 Does not verify AFE communications.
1 Does verify AFE communications.
DS
The DS bit programs the bq2084-V140 to enter sleep mode on SMBus inactivity.
0 bq2084-V140 enters sleep mode when the SMBus is low for 2 s.
1 bq2084-V140 does not enter sleep mode.
OT
The OT bit enables the bq2084-V140 to turn off the FETs when the bq2084-V140 detects an overtemperature
condition.
1 bq2084-V140 turns the appropriate FET off under over temperature conditions
0 bq2084-V140 takes no FET action at all on over temperature conditions
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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