bq27441 Data Memory Parameter Descriptions
Subclass
Subclass
Offset
Type
Name
Value
Unit
ID
Min
Max
Default
IT Cfg
80
36
U1
Fast Qmax End DOD %
0
100
96
%
41
U1
Fast Qmax Min Points
0
255
3
Num
Fast Qmax measurement is calculated at the end of discharge when the following conditions are met:
•
Number of Fast Qmax measurements >
Fast Qmax Min Points
•
DOD >
Fast Qmax End DOD%
6.4.2.1.4 Maximum Qmax Change
Subclass
Subclass
Offset
Type
Name
Value
Unit
ID
Min
Max
Default
IT Cfg
80
45
U1
Max Qmax Change
0
255
20
%
Max Qmax Change
specifies the maximum allowed change in Qmax value during Qmax update. Qmax
update is disqualified if the change from previous Qmax value is greater than
Max Qmax Change
.
6.4.2.1.5 Qmax Maximum Delta %
Subclass
Subclass
Offset
Type
Name
Value
Unit
ID
Min
Max
Default
IT Cfg
80
46
U1
Qmax Max Delta %
0
255
10
%
This is the percentage of
DesignCapacity()
that limits how much Qmax may grow or shrink during any
one Qmax update.
The default is 10%.
6.4.2.1.6 Maximum % Default Qmax
Subclass
Subclass
Offset
Type
Name
Value
Unit
ID
Min
Max
Default
IT Cfg
80
47
U1
Max % Default Qmax
0
255
120
%
Provides an upper limit to the value to which Qmax can be learned. The default value is sufficient for most
applications.
6.4.2.1.7 Qmax Filter
Subclass
Subclass
Offset
Type
Name
Value
Unit
ID
Min
Max
Default
IT Cfg
80
48
U1
Qmax Filter
0
255
96
Num
Qmax updates are filtered to prevent corrupt values. It is not recommended to change this value.
38
Data Memory
SLUUAC9A – December 2013 – Revised May 2015
Copyright © 2013–2015, Texas Instruments Incorporated