BQ28550-R1 datasheet(24/42 Pages) TI1

24 / 42 page

Not Recommended for New Designs

bq28550-R1

SLUSAS4A – OCTOBER 2012 – REVISED SEPTEMBER 2014

www.ti.com

Table 6. Operational Modes (continued)

Mode

Enter Mode

Exit Mode

Comment

SLEEP bit set = 1 in operation

Change SLEEP bit = 0 OR

AverageCurrent measurement > Sleep The data is measured every 20 s to

SLEEP

measured is equal to Sleep current

current value OR Current detected is

reduce current consumption.

value.

above the IWAKE setting.

From SLEEP mode if the

WAIT_FULLSLEEP wait is

The system exits the FULLSLEEP

The wait time to enter FULLSLEEP

programmed, this is the time the

mode if there are any communication

FULLSLEEP

from SLEEP is 1 s to 240 s with the

system must be in SLEEP mode

commands set on the bus to the

default at 15 s.

before it can go to FULLSLEEP

device.

mode.

From FULLSLEEP mode, the system

will go into HIBERNATE mode if the

The system exits this mode is the

load current decreases to the

VCELL > programmed threshold,

Enters hibernation if VCELL range is

programmed value,

OR load current is > programmed

2.4 V to 3 V with default at 2.55 V.

HIBERNATION

OR if the cell voltage falls below the

threshold,

The load current threshold range is 0

programmed value,

OR communication activity on bus line, to 0.7 A with a default value of 8 mA.

OR the host sets the command in

OR host sets the command in MAC.

MAC.

From SLEEP mode, the system will

Exit from this mode if there is bus

In this mode, the VREG and DSG

enter this mode if the VCELL < 2.4 V

activity,

FET are turned OFF and the system

for a period longer than 24 ms and

OR the load current detected is >

SHUTDOWN

will only wake up if the charger is

the charger is not attached. The

IWAKE ,

attached on the Pack+, Pack–

system can also be put in

OR the charger is connected to the

terminals.

SHUTDOWN mode through MAC.

system.

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.

Table 7. Standard Commands

Name

Command Code

Min Value

Max Value

Default value

Units

Sealed Access

ManufacturerAccess()

0x00

0x0000

0xffff

—

R/W

BatteryMode()

0x03

0x0000

0xe383

—

R/W

Temperature()

0x08

65535

—

0.1K

Voltage()

0x09

65535

—

Current()

0x0a

–32768

32767

—

AverageCurrent()

0x0b

–32768

32767

—

MaxError()

0x0c

100%

—

RelativeStateOfCharge()

0x0d

100%

—

mAh or 10

RemainingCapacity()

0x0f

65535

—

R/W

mWh

FullChargeCapacity()

0x10

65535

7200

ChargingCurrent()

0x14

65534

2500

ChargingVoltage()

0x15

65534

12600

BatteryStatus()

0x16

0x0000

0xdbff

—

CycleCount()

0x17

65535

—

R/W

DesignCapacity()

0x18

65535

7200

mAh

R/W

DesignVoltage()

0x18

65535

3600

R/W

SpecificationInfo()

0x1a

0x0000

0xffff

0x0031

—

R/W

ManufactureDate()

0x1b

—

ASCII

R/W

SerialNumber()

0x1c

0x0000

0xffff

0x0001

—

R/W

ManufacturerName

0x20

—

Texas Inst

ASCII

R/W

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