BQ2060SS Datasheet, PDF (26/59 Pages) Texas Instruments – SBS V1.1-COMPLIANT GAS GAUGE IC

bq2060
SLUS035E – JANUARY 2000 – REVISED OCTOBER 2005
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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 bq2060
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 bq2060 automatically updates AtRateOK() based on the At Rate() value every 20 s.
SMBus PROTOCOL ReadWord
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 bq2060.
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 ReadWord
OUTPUT
Unsigned integer—cell temperature in tenth-degree Kelvin increments.
Units: 0.1°K
Range: 0 to +6553.5°K {real range}
Granularity: 0.1°K
Accuracy: ±1.°K (from ideal 103AT thermistor performance, after calibration)
Voltage() (0x09); [0x09]
DESCRIPTION Returns the cell-pack voltage (mV).
PURPOSE
The Voltage() function provides power management systems with an accurate battery terminal
voltage. Power management systems can use this voltage, along with battery current information,
to characterize devices they control. This ability helps enable intelligent, adaptive power
management systems.
SMBus PROTOCOL ReadWord
OUTPUT:
Unsigned integer—battery terminal voltage in mV.
Units: mV
Range: 0 to 20,000 mV
Granularity: 1 mV
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