BQ2060A_15 Datasheet, PDF (32/61 Pages) Texas Instruments – SBS v1.1-Compliant Gas Gauge IC

bq2060A
SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011
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AverageTimeToEmpty() (0x12); [0x12]
Description: Returns a 1-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 that 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.
AverageTimeToFull() (0x13); [0x13]
Description: Returns a 1-minute rolling average of the predicted remaining time until the battery reaches full
charge (minutes).
Purpose: The AverageTimeToFull() function can be used by the SMBus host power-management system to aid
in its policy. It may also be used to find out how long the system must be left on to achieve full charge.
SMBus Protocol: Read Word
Output:
Unsigned integer—remaining time in minutes.
• Units: minutes
• Range: 0 to 65,534 minutes
• Granularity: 2 minutes or better
• Accuracy: MaxError()*FullChargeCapacity() / AverageCurrent()
• Invalid Data Indication: 65,535 indicates the battery is not being charged
ChargingCurrent() (0x14); [0x14]
Description: Returns the desired charging rate in mA.
Purpose: The ChargingCurrent() function sets the maximum charge current of the battery. The
ChargingCurrent() value should be used in combination with the ChargingVoltage() value to set the charger
operating point. Together, these functions permit the bq2060A to dynamically control the charging profile
(current/voltage) of the battery. The bq2060A can effectively turn off a charger by returning a value of 0 for this
function. The charger may be operated as a constant-voltage source above its maximum regulated current range
by returning a ChargingCurrent() value of 65,535.
SMBus Protocol: Read Word
Output:
Unsigned integer—maximum charger output current in mA.
• Units: mA
• Range: 0 mA to 65,535 mA
• Granularity: 1 mA
• Accuracy: not applicable
• Invalid Data Indication: 65,535 indicates that a charger should operate as a voltage source outside its
maximum regulated current range.
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