Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - battery management Charge indicator Li-Ion SON 12 (2.5x4) Surface-mount

bq27510-G2

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SLUS948 –AUGUST 2010

CAL_MODE: 0x0040

This command instructs the fuel gauge to enter calibration mode. This command is only available when the fuel

gauge is UNSEALED.

RESET : 0x0041

This command instructs the fuel gauge to perform a full reset. This command is only available when the fuel

gauge is UNSEALED.

AtRate( ): 0x02/0x03

The AtRate( ) read-/write-word function is the first half of a two-function command set used to set the AtRate

value used in calculations made by the AtRateTimeToEmpty( ) function. The AtRate( ) units are in mA.

The AtRate( ) value is a signed integer, with negative values interpreted as a discharge current value. The

AtRateTimeToEmpty( ) function returns the predicted operating time at the AtRate value of discharge. The

default value for AtRate( ) is zero and will force AtRate( ) to return 65,535. Both the AtRate( ) and

AtRateTimeToEmpty( ) commands should only be used in NORMAL mode.

AtRateTimeToEmpty( ): 0x04/0x05

This read-word function returns an unsigned integer value of the predicted remaining operating time if the battery

is discharged at the AtRate( ) value in minutes with a range of 0 to 65,534. A value of 65,535 indicates AtRate( )

= 0. The fuel gauge updates AtRateTimeToEmpty( ) within 1 s after the system sets the AtRate( ) value. The fuel

gauge automatically updates AtRateTimeToEmpty( ) based on the AtRate( ) value every 1s. Both the AtRate( )

and AtRateTimeToEmpty( ) commands should only be used in NORMAL mode.

Temperature( ): 0x06/0x07

This read-word function returns an unsigned integer value of the battery temperature in units of 0.1K measured

by the fuel gauge and has a range of 0 to 6553.5K.

Voltage( ): 0x08/0x09

This read-word function returns an unsigned integer value of the measured cell-pack voltage in mV with a range

of 0 to 6000 mV.

Flags( ): 0x0a/0x0b

This read-word function returns the contents of the gas-gauge status register, depicting the current operating

status.

Table 4. Flags Bit Definitions

bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0

High Byte OTC OTD – – CHG_INH XCHG FC CHG

Low Byte – – OCV_GD WAIT_ID BAT_DET SOC1 SOCF DSG

OTC = Over-Temperature in charge condition is detected. True when set.

OTD = Over-Temperature in discharge condition is detected. True when set.

CHG_INH = Charge Inhibit: unable to begin charging (temp outside the range [Charge Inhibit Temp Low, Charge Inhibit Temp High]).

True when set.

Charge Suspend Alert (temp outside the range [Suspend Temperature Low, Suspend Temperature High]). True when

XCHG =

set.

FC = Full-charged condition reached. True when set.

CHG = (Fast) charging allowed. True when set.

OCV_GD = Good OCV measurement taken. True when set.

WAIT_ID = Waiting to identify inserted battery. True when set.

BAT_DET = Battery detected. True when set.

SOC1 = State-of-Charge-Threshold 1 (SOC1 Set) reached. True when set.