MAX17050EVKIT# Maxim Integrated, MAX17050EVKIT# Datasheet - Page 38

• Manufacturer Part Number: MAX17050EVKIT#
• Description: Power Management IC Development Tools MAX17050 Eval Kit
• Manufacturer: Maxim Integrated
• Type: Voltage Protectionr
• Series: MAX17047, MAX17050r

Specifications of MAX17050EVKIT#

• Rohs: yes
• Product: Evaluation Kits
• Tool Is For Evaluation Of: MAX17050
• Input Voltage: 2.5 V to 4.5 V
• Interface Type: I2C
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Part # Aliases: 90-BT07K#D00
• For Use With: MAX17050

Figure 54. MaxMinCurrent Register Format (Output)
The AverageCurrent register reports an average of
current-register readings over a configurable 0.7s to
6.4h time period. See the FilterCFG register descrip-
tion for details on setting the time filter. The resulting
average is placed in the AverageCurrent register with
an LSb value of 1.5625FV/R
register reading after device power-up sets the start-
ing point of the AverageCurrent filter. The last value
of the AverageCurrent register is maintained when the
device enters shutdown mode.
AverageCurrent register format.
The MaxMinCurrent register maintains the maximum and
minimum Current register values since the last fuel gauge
reset or until cleared by host software. Each time the
Current register updates, it is compared against these
values. If the reading is larger than the maximum or less
than the minimum, the corresponding value is replaced
with the new reading. At power-up, the MaxCurrent value
is set to 80h (the minimum) and the MinCurrent value is
set to 7Fh (the maximum). Therefore, both values are
changed to the Current register reading after the first
Figure 53. AverageCurrent Register Format (Output)
Maxim Integrated
Figure 52. Current Register Format (Output)
MSb
MSb
MSb
S
S
S
MAX
2
2
14
14
6
AverageCurrent Register (0Bh)
MaxMinCurrent Register (1Ch)
MAX
2
2
MSB—ADDRESS 0Ah
MSB—ADDRESS 0Bh
MSB—ADDRESS 1Ch
13
13
5
MAX
2
2
12
12
4
SENSE
MAX
2
2
11
11
Figure 53
3
. The first Current
2
2
MAX
10
10
2
2
2
shows the
MAX
9
9
1
LSb
LSb
2
2
MAX
LSb
8
8
ModelGauge m3 Fuel Gauge
0
update. Host software can reset this register by writing it
to its power-up value of 807Fh. The maximum and mini-
mum voltages are each stored as two’s-complement 8-bit
values with 0.4mV/R
the MaxMinCurrent register format.
The CGAIN and COFF registers adjust the gain and off-
set of the current measurement result. The current mea-
surement A/D is factory trimmed to data-sheet accuracy
without the need for the user to make further adjustments.
The default power-up settings for CGAIN and COFF
apply no adjustments to the Current register reading. For
specific application requirements, the CGAIN and COFF
registers can be used to adjust readings as follows:
For easiest software compatibility between systems,
configure CGAIN to keep current LSb resolution at
0.15625mA. A minimum sense resistance of 0.005I
is required due to the maximum range of CGAIN. This
preserves resolution of current readings and capacities.
MSb
UNITS: 1.5625FV/R
MSb
UNITS: 1.5625FV/R
MSb
UNITS: 0.4mV/R
CGAIN Register (2Eh)/COFF Register (2Fh)
2
2
7
7
S
(CGAIN Register/16384) + (2 O COFF Register)
MAX17047/MAX17050
Current Register = Current A/D Reading O
MIN
2
2
6
6
6
MIN
2
2
LSB—ADDRESS 0BH
LSB—ADDRESS 0Ah
5
5
LSB—ADDRESS 1Ch
SENSE
5
SENSE
SENSE
SENSE
MIN
2
2
4
4
4
MIN
2
2
resolution.
3
3
3
2
2
MIN
2
2
2
Figure 54
2
2
MIN
1
1
1
LSb
LSb
2
2
MIN
LSb
0
0
0
shows
38