Texas Instruments bq27441-G1, Техническое описание

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bq27441 Data Memory Parameter Descriptions
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6.4.1.2.3 DOD at EOC Delta Temperature
Subclass Subclass Offset Type Name Value Unit
ID
Min Max Default
Charge 36 7 I2 DODatEOC Delta T 0 1000 50 0.1°C
Termination
During relaxation and charge start, RemainingCapacity() = FullChargeCapacity() – Qstart. But with
temperature decreases, Qstart can become much smaller than old FullChargeCapacity() resulting in an
over-estimation of RemainingCapacity() . To improve accuracy, gauging predictions are updated when the
temperature has changed by at least DODatEOC Delta T since the last simulation.
6.4.1.3 Data Subclass
6.4.1.3.1 Initial Standby Current
Subclass Subclass Offset Type Name Value Unit
ID
Min Max Default
Data 48 2 I1 Initial Standby –128 0 –3 mA
This is the initial value that is reported in StandbyCurrent() . The StandbyCurrent() value is updated every
1 second when the measured current meets the following criteria:
|Current| >
Deadband and Current ≤ 2 × Initial Standby.
NOTE: Current is negative during discharge.
This value depends on the system. The initial standby current is the current load drawn by the system
when in low-power mode.
6.4.1.3.2 Initial Maximum Load Current
Subclass Subclass Offset Type Name Value Unit
ID
Min Max Default
Data 48 3 I2 Initial MaxLoad –32768 0 –200 mA
This is the initial value that is reported in MaxLoadCurrent() . The MaxLoadCurrent() is updated to the new
current when Current > Initial MaxLoad . MaxLoadCurrent() is reduced to the average of the previous
value and Initial MaxLoad whenever the battery is charged to full after a previous discharge to an SOC
less than 50%. This prevents the reported value from maintaining an unusually high value. Default value
depends on the system.
34 Data Memory SLUUAC9A – December 2013 – Revised May 2015
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