BQ28550-R1 Datasheet, PDF (24/42 Pages) Texas Instruments – Single Cell Li-Ion Battery Gas Gauge

Not Recommended for New Designs
bq28550-R1
SLUSAS4A – OCTOBER 2012 – REVISED SEPTEMBER 2014
www.ti.com
Mode
SLEEP
FULLSLEEP
HIBERNATION
SHUTDOWN
Table 6. Operational Modes (continued)
Enter Mode
Exit Mode
Comment
SLEEP bit set = 1 in operation
register AND AverageCurrent
measured is equal to Sleep current
value.
From SLEEP mode if the
WAIT_FULLSLEEP wait is
programmed, this is the time the
system must be in SLEEP mode
before it can go to FULLSLEEP
mode.
Change SLEEP bit = 0 OR
AverageCurrent measurement > Sleep
current value OR Current detected is
above the I_WAKE setting.
The data is measured every 20 s to
reduce current consumption.
The system exits the FULLSLEEP
mode if there are any communication
commands set on the bus to the
device.
The wait time to enter FULLSLEEP
from SLEEP is 1 s to 240 s with the
default at 15 s.
From FULLSLEEP mode, the system
will go into HIBERNATE mode if the
load current decreases to the
programmed value,
OR if the cell voltage falls below the
programmed value,
OR the host sets the command in
MAC.
The system exits this mode is the
V_CELL > programmed threshold,
OR load current is > programmed
threshold,
OR communication activity on bus line,
OR host sets the command in MAC.
Enters hibernation if V_CELL range is
2.4 V to 3 V with default at 2.55 V.
The load current threshold range is 0
to 0.7 A with a default value of 8 mA.
From SLEEP mode, the system will
enter this mode if the V_CELL < 2.4 V
for a period longer than 24 ms and
the charger is not attached. The
system can also be put in
SHUTDOWN mode through MAC.
Exit from this mode if there is bus
activity,
OR the load current detected is >
I_WAKE ,
OR the charger is connected to the
system.
In this mode, the VREG and DSG
FET are turned OFF and the system
will only wake up if the charger is
attached on the Pack+, Pack–
terminals.
7.6.5.7 Data Commands
7.6.5.7.1 Standard Data Commands
The bq28550-R1 device uses the following Command Code. Data RAM is updated and read by the gauge only
once per second. Standard commands are accessible in NORMAL operation mode.
Name
ManufacturerAccess()
BatteryMode()
Temperature()
Voltage()
Current()
AverageCurrent()
MaxError()
RelativeStateOfCharge()
RemainingCapacity()
FullChargeCapacity()
ChargingCurrent()
ChargingVoltage()
BatteryStatus()
CycleCount()
DesignCapacity()
DesignVoltage()
SpecificationInfo()
ManufactureDate()
SerialNumber()
ManufacturerName
Table 7. Standard Commands
Command Code
0x00
0x03
0x08
0x09
0x0a
0x0b
0x0c
0x0d
Min Value
0x0000
0x0000
0
0
–32768
–32768
0%
0%
Max Value
0xffff
0xe383
65535
65535
32767
32767
100%
100%
Default value
—
—
—
—
—
—
—
—
0x0f
0
65535
—
0x10
0x14
0x15
0x16
0x17
0x18
0x18
0x1a
0x1b
0x1c
0x20
0
0
0
0x0000
0
0
0
0x0000
—
0x0000
—
65535
65534
65534
0xdbff
65535
65535
65535
0xffff
—
0xffff
—
7200
2500
12600
—
0
7200
3600
0x0031
0
0x0001
Texas Inst
Units
—
—
0.1K
mV
mA
mA
mAh or 10
mWh
mA
mA
mV
—
—
mAh
mV
—
ASCII
—
ASCII
Sealed Access
R/W
R/W
R
R
R
R
R
R
R/W
R
R
R
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
24
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