MAX17047/MAX17050
ModelGauge m3 Fuel Gauge
use only the upper byte of the register with a resolution
RemCap
Register (0Fh)
MIX
of 1.0%. Figure 12 shows the SOC
register format.
The RemCap
register holds the calculated remain-
REP
MIX
ing capacity of the cell before any empty compensation
adjustments are performed. The value is stored in terms
of FVh and must be divided by the application sense-
resistor value to determine remaining capacity in mAh.
RemCap
Register (05h)
REP
RemCap
is a filtered version of the RemCap register
REP
AV
that prevents large jumps in the reported value caused by
changes in the application such as abrupt changes in load
current. The value is stored in terms of FVh and must be
divided by the application sense-resistor value to determine
remaining capacity in mAh. During application idle periods
where the AverageCurrent Register value is less than Q6
Figure 11 shows the RemCap
register format.
MIX
SOC
Register (06h)
REP
SOC
is a filtered version of the SOC
register that
REP
AV
prevents large jumps in the reported value caused by
changes in the application such as abrupt changes in
load current. The register value is stored as a percent-
age with a resolution of 0.0039% per LSb. If an 8-bit SOC
value is desired, the host can discard the lower byte and
LSbs, RemCap
does not change. The measured cur-
rent during this period is still accumulated into RemCap
REP
MIX
and is slowly reflected in RemCap
once cell loading or
REP
charging occurs. Figure 13 shows the RemCap
format.
register
REP
MSB—ADDRESS 0Fh
LSB—ADDRESS 0Fh
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 11. RemCap
Register Format (Output)
MIX
MSB—ADDRESS 06h
LSB—ADDRESS 06h
7
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
MSb
LSb
MSb
-8
LSb
2
UNITS: 0.0039%
0
2 UNITS: 1.0%
Figure 12. SOC
Register Format (Output)
REP
MSB—ADDRESS 05h
LSB—ADDRESS 05h
15
2
14
2
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
MSb
LSb
MSb
0
LSb
2 UNITS: 5.0FVh/R
SENSE
(0.5mAh WHEN R
= 0.010I)
SENSE
Figure 13. RemCap
Register Format (Output)
REP
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
