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bq27441 Data Memory Parameter Descriptions
Subclass
Subclass
Offset
Type
Name
Value
Unit
ID
Min
Max
Default
State
82
35
I2
Avg I Last Run
–32768
–1
–50
0.1 Hr
rate
The gauge logs the current averaged from the beginning to the end of each discharge period. It stores this
average current from the previous discharge in this register. This register can be initialized to a typical
system current load. It is updated by the gauge after a discharge lasts for at least 500 seconds and stops.
The default represents a C/5 load. It should always be a negative value.
6.4.2.3.15 Average Power Last Run
Subclass
Subclass
Offset
Type
Name
Value
Unit
ID
Min
Max
Default
State
82
37
I2
Avg P Last Run
–32768
–1
–50
0.1 Hr
rate
The gauge logs the power averaged from the beginning to the end of each discharge period. It stores this
average power from the previous discharge in this register. To get a correct average power reading the
gauge continuously multiplies current times voltage to get power. It then logs this data to derive the
average power. This register can be initialized to a typical system power load. It is updated by the gauge
after a discharge lasts for at least 500 seconds and stops. The default represents a C/5 load. It should
always be a negative value.
6.4.2.3.16 Delta Voltage
Subclass
Subclass
Offset
Type
Name
Value
Unit
ID
Min
Max
Default
State
82
39
I2
Delta Voltage
0
1000
1
mV
The gauge stores the maximum difference of Voltage during short load spikes and normal load, so the
Impedance Track™ algorithm can calculate
RemainingCapacity()
for pulsed loads. It is added to
Terminate Voltage
for Impedance Track™ simulations.
This value will never update to a value less than
Min Delta Voltage
or greater than
Max Delta Voltage
. If
Min Delta Voltage
is set to a value above zero, then
Delta Voltage
should also be initialized to at least
the same value as
Min Delta Voltage
.
47
SLUUAC9A – December 2013 – Revised May 2015
Data Memory
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