BQ2063_15 Datasheet, PDF (33/60 Pages) Texas Instruments – SBS v1.1-COMPLIANT Li-ION GAS-GAUGE IC

Not Recommended For New Designs
bq2063
SBS v1.1ĆCOMPLIANT LiĆION GASĆGAUGE IC
WITH PROTECTOR INTERFACE
SLUS468E− MAY 2001 − REVISED APRIL 2002
command codes (continued)
FullChargeCapacity( ) (0x10); [0x10]
Description: Returns the predicted pack capacity when it is fully charged. The FullChargeCapacity( ) value
is expressed in either current (mAh at a C/5 discharge rate) or power (10 mWh at a P/5 discharge rate)
depending on the setting of the BatteryMode( ) CAPACITY_MODE bit.
Purpose: The FullChargeCapacity( ) function provides a means of understanding the tank size of the battery.
This information, along with information about the original capacity of the battery, indicates battery wear.
SMBus Protocol: Read Word
Output: Unsigned integer—estimated full-charge capacity in mAh or 10 mWh.
Units
Range
Granularity
Accuracy
BATTERY MODES
CAPACITY_MODE
BIT = 0
CAPACITY_MODE
BIT = 1
mAh
10 mWh
0–65,535 mAh
0–65,535 10 mWh
mAh
10 mWh
−0, +MaxError( ) _* FullCharageCapacity( )
RunTimeToEmpty( ) (0x11); [0x11]
Description: Returns the predicted remaining battery life at the present rate of discharge (minutes). The
RunTimeToEmpty( ) value is calculated based on either current or power depending on the setting of the
BatteryMode( ) CAPACITY_MODE bit.
Purpose: The RunTimeToEmpty( ) provides the power management system with information about the relative
gain or loss in remaining battery life in response to a change in power policy. This information is not the same
as the AverageTimeToEmpty( ), which is not suitable to determine the effects that result from a change in power
policy.
SMBus Protocol: Read Word
Output: Unsigned integer-minutes of operation left.
Units: minutes
Range: 0 to 65,534 min
Granularity: 2 min or better
Accuracy: −0, +MaxError( ) _* FullChargeCapacity( ) / Current( )
Invalid Data Indication: 65,535 indicates battery is not being discharged.
AverageTimeToEmpty( ) (0x12); [0x12]
Description: Returns a one-minute rolling average of the predicted remaining battery life (minutes). The
AverageTimeToEmpty( ) value is calculated based on either current or power depending on the setting of the
BatteryMode( ) CAPACITY_MODE bit.
Purpose: The AverageTimeToEmpty( ) displays state-of-charge information in a more useful way. It averages
the instantaneous estimations so the remaining time does not appear to jump around.
SMBus Protocol: Read Word
Output: Unsigned integer—minutes of operation left.
Units: minutes
Range: 0 to 65,534 min
Granularity: 2 min or better
Accuracy: −0, +MaxError( ) _∗ FullChargeCapacity( ) / AverageCurrent( )
Invalid Data Indication: 65,535 indicates battery is not being discharged.
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