BQ2060A_15 Datasheet, PDF (28/61 Pages) Texas Instruments – SBS v1.1-Compliant Gas Gauge IC

bq2060A
SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011
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Unsigned integer—predicted time in minutes to fully charge the battery.
• Units: minutes
• Range: 0 to 65,534 min
• Granularity: 2 min or better
• Accuracy: ±MaxError() * FullChargeCapacity() / |AtRate()|
• Invalid Data Indication: 65,535 indicates the battery is not being charged.
AtRateTimeToEmpty() (0x06); [0x06]
Description: Returns the predicted remaining operating time if the battery is discharged at the AtRate() value.
Purpose: The AtRateTimeToEmpty() function is part of a two-function call-set used to determine the remaining
operating time at the AtRate() value. The bq2060A updates AtRateTimeToEmpty() within 1.3 s after the SMBus
Host sets the AtRate() value. If read before this delay, the command is No Acknowledged, and the error code in
BatteryStatus is set to not ready. The bq2060A automatically updates AtRateTimeToEmpty() based on the
AtRate() value every 20 s.
SMBus Protocol: Read Word
Output:
Unsigned integer — estimated operating time left.
• Units: minutes
• Range: 0 to 65,534 min
• Granularity: 2 min or better
• Accuracy: –0,+MaxError()*FullChargeCapacity/|AtRate()|
• Invalid Data Indication: 65,535 indicates the battery is not being discharged.
AtRateOK() (0x07); [0x07]
Description: Returns a Boolean value that indicates whether or not the battery can deliver the AtRate( ) value of
additional energy for 10 seconds (Boolean). If the AtRate value is zero or positive, the AtRateOK() function
always returns true.
Purpose:The AtRateOK() function is part of a two-function call-set used by power management systems to
determine if the battery can safely supply enough energy for an additional load. The bq2060A updates
AtRateOK() within 1.3 s after the SMBus Host sets the AtRate( ) value. If read before this delay, the command is
No Acknowledged, and the error code in BatteryStatus is set to not ready. The bq2060A automatically updates
AtRateOK() based on the At Rate() value every 20 s.
SMBus Protocol: Read Word
Output:
Boolean—indicates if the battery can supply the additional energy requested.
• Units: Boolean
• Range: TRUE, FALSE
• Granularity: not applicable
• Accuracy: not applicable
Temperature() (0x08); [0x08]
Description: Returns the temperature (K) measured by the bq2060A.
Purpose: The Temperature() function provides accurate cell temperatures for use by battery chargers and
thermal management systems. A battery charger can use the temperature as a safety check. Thermal
management systems may use the temperature because the battery is one of the largest thermal sources in a
system.
SMBus Protocol: Read Word
Output:
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