BQ2092_15 Datasheet, PDF (16/30 Pages) Texas Instruments – Gas Gauge IC with SMBus-Like Interface

Obsolete Device
bq2092
Where CHM is:
0 Selects Nickel
1 Selects Li-Ion
Bit 4, the Charge Control flag (CC), determines whether
a bq2092-based charge termination will set RM to a
user-defined programmable full charge capacity.
The CC values are:
76
-
-
FLAGS2 Bits
5
43210
-
CC -
-
-
-
Where CC is:
0 RM is not modified on valid bq2092
charge termination
1 RM is set to a programmable percentage of
the FCC when a valid bq2092 charge termi-
nation occurs
Bit 3 is reserved.
Bit 2, the Overvoltage flag (OV), is set when the bq2092
detects a pack voltage 5% greater than the programmed
charging voltage. This bit is cleared when the pack volt-
age falls 5% below the programmed charging voltage.
This flag is cleared when the average current falls below
256mA.
The OC values are:
FLAGS2 Bits
765432
-
-
-
-
-
-
1
0
-
OC
Where OC is:
0 Average current is less than 1.25 ∗ charg-
ing current or less than 256mA if charging
current is programmed less than 1024mA
1 Average current exceeds 1.25 ∗ charging
current or 256mA if the charging current is
programmed less than 1024mA. This bit is
cleared if average current < 256mA
FLAGS1
Bits 7 and 6 are reserved. The Valid Charge flag (VQ),
bit 5, is set when VSRO ≥ |VSRD| and 10mAh of charge
has accumulated. This bit is cleared during a discharge
and when VSRO ≤ |VSRD|.
The VQ values are:
The OV values are:
76
-
-
FLAGS2 Bits
5
43210
-
-
- OV -
-
Where OV is:
0 BatteryVoltage() < 1.05 ∗ ChargingVoltage
1 BatteryVoltage() ≥ 1.05 ∗ ChargingVoltage
Bit 1, the Low Temperature Fault flag (LTF), is set when
temperature < 0°C and cleared when temperature > 5°C.
The LTF values are:
Where LTF is:
0 Temperature > 5°C
1 Temperature < 0°C
Bit 0, the Overcurrent flag (OC), is set when the average
current is 25% greater than the programmed charging
current. If the charging current is programmed less than
1024mA, overcurrent is set if the average current is
256mA greater than the programmed charging current.
76
-
-
FLAGS1 Bits
5
43210
VQ
-
-
-
-
-
Where VQ is:
0 VSRO ≤ |VSRD|
1 VSRO ≥ |VSRD| and 10mAh of charge has
accumulated
The Write Inhibit flag (WRINH), bit 4, allows or inhibits
writes to all registers.
The WRINH values are:
FLAGS1 Bits
765
4
3210
-
-
- WRINH -
-
-
-
Where WRINH is:
0 Allows writes to all registers
1 Inhibits all writes and secures the bq2092
from invalid/undesired writes.
16