Datasheet

bq2060A
www.ti.com SLUS500D –OCTOBER 2001– REVISED OCTOBER 2011
SMBus Protocol: Read Word
Output:
Unsigned integer—remaining charge in mAh or 10 mWh.
BATTERY MODE
CAPACITY_MODE CAPACITY_MODE
BIT = 0 BIT = 1
Units mAh 10 mWh
Range 0–65,535 mAh 0–65, 535 10 mWh
Granularity mAh 10 mWh
Accuracy –0, +MaxError()*FullChargeCapacity()
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 the user with a means of understanding the tank size of
their battery. This information, along with information about the original capacity of the battery, can be presented
to the user as an indication of battery wear.
SMBus Protocol: Read Word
Output:
Unsigned integer—estimated full-charge capacity in mAh or 10 mWh.
BATTERY MODE
CAPACITY_MODE CAPACITY_MODE
BIT = 0 BIT = 1
Units mAh 10 mWh
Range 0–65,535 mAh 0–65,535 10 mWh
Granularity mAh 10 mWh
Accuracy –0, +MaxError()*FullChargeCapacity()
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.
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