MAX17047/MAX17050
ModelGauge m3 Fuel Gauge
FullCAP Register (10h)
FullCapNom Register (23h)
This register holds the calculated full capacity of the cell,
not including temperature and charger tolerance. New
full capacity values are calculated periodically by the IC
during operation. The value is stored in terms of FVh and
must be divided by the application sense resistor value
to determine capacity in mAh. This register is used to
calculate the outputs of the ModelGauge m3 algorithm
and is available to the user only for debug. Figure 22 is
the FullCapNom register format.
This register holds the ModelGauge m3 algorithm calcu-
lated full capacity of the cell under best-case conditions
(light load, hot). A new full-capacity value is calculated
after the end of every charge cycle in the application. The
value is stored in terms of FVh and must be divided by
the application sense-resistor value to determine capac-
ity in mAh. Figure 21 is the FullCAP register format. See
the End-of-Charge Detection section.
MSB—ADDRESS FBh
LSB—ADDRESS FBh
11
10
9
8
7
6
5
4
3
2
1
0
2
2
2
2
2
2
2
2
2
2
2
2
X
X
X
X
MSb
LSb
MSb
0
LSb
2 UNITS: 1.25mV
X = DON’T CARE
Figure 20. VFOCV Register Format (Output)
MSB—ADDRESS 10h
LSB—ADDRESS 10h
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
MSb
LSb
MSb
0
LSb
2 UNITS: 5.0FVh/R
SENSE
(0.5mAh WHEN R
= 0.010I)
SENSE
Figure 21. FullCAP Register Format (Output)
MSB—ADDRESS 23h
LSB—ADDRESS 23h
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
MSb
LSb
MSb
0
LSb
2 UNITS: 5.0FVh/R
SENSE
(0.5mAh WHEN R
= 0.010I)
SENSE
Figure 22. FullCapNom Register Format (Output)
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
