BQ2083-V1P2 Datasheet, PDF (29/55 Pages) Texas Instruments – SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bp29311

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bq2083-V1P2
SLUS573 − JULY 2003
If voltage-based corrections are applied to the coulomb counter, MaxError( ) is set to 25%.
Purpose: The MaxError( ) function has real value in two ways: first, to give the user a confidence level about the
state of charge and second, to give the power management system information about how aggressive it should
be, particularly as the battery nears the end of its life.
SMBus protocol: Read word
Output: Unsigned integer—percent uncertainty for selected information.
Units: %
Range: 2–100%
Granularity: 1%
Accuracy: Not applicable
RelativeStateOfCharge( ) (0x0d)
Description: Returns the predicted remaining battery capacity expressed as a percentage of
FullChargeCapacity( ) (%).
Purpose: The RelativeStateOfCharge( ) function is used to estimate the amount of charge remaining in the
battery relative to the last learned capacity.
SMBus protocol: Read word
Output: Unsigned integer-percent of remaining capacity.
Units: %
Range: 0–100%
Granularity: 1%
Accuracy: -0, +MaxError( )
AbsoluteStateOfCharge( )(0x0e)
Description: Returns the predicted remaining battery capacity expressed as a percentage of DesignCapacity( )
(%). Note that AbsoluteStateOfCharge( ) can return values greater than 100%.
Purpose: The AbsoluteStateOfCharge( ) function is used to estimate the amount of charge remaining in the
battery relative to the nominal or DesignCapacity( ).
SMBus protocol: Read word
Output: Unsigned integerpercent of remaining capacity.
Units: %
Range: 0–100+%
Granularity: 1%
Accuracy: -0, +MaxError( )
RemainingCapacity( ) (0x0f)
Description: Returns the predicted charge or energy remaining in the battery. The RemainingCapacity( ) value
is expressed in either charge or energy, depending on the setting of the BatteryMode( ) CAPACITY_MODE bit.
Purpose: The RemainingCapacity( ) function returns the battery’s remaining capacity. This information is a
numeric indication of remaining charge or energy given by the Absolute or Relative StateOfCharge( ) functions
and may be in a better form for use by power management systems.
SMBus protocol: Read word
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