MAX17050EVKIT# Maxim Integrated, MAX17050EVKIT# Datasheet - Page 20

• 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

The QH register displays the raw coulomb count gener-
ated by the device. This register is used internally as an
input to the mixing algorithm. Monitoring changes in QH
over time can be useful for debugging device operation.
The QH register is set to 0000h at power-up. The QH reg-
ister format is shown in
The following registers define the behavior of the applica-
tion. They must be programmed by the user before the
ModelGauge m3 algorithm is accurate. Any changes to
these register values require recharacterization of the cell.
The DesignCap register holds the expected capacity of
the cell. This value is used to determine age and health
Figure 23. QH Register Format (Output)
Figure 24. DesignCap Register Format (Input)
Figure 25. FullSOCThr Register Format (Input)
Maxim Integrated
MSb
MSb
MSb
2
2
Application-Specific Registers
2
15
15
7
2
2
2
14
14
6
2
2
2
MSB—ADDRESS 23h
MSB—ADDRESS 18h
13
13
MSB—Address 4Dh
5
Figure
DesignCap Register (18h)
2
2
2
12
12
4
23.
2
2
2
QH Register (4Dh)
11
11
3
2
2
2
10
10
2
2
2
2
9
9
1
LSb
LSb
LSb
2
2
2
8
8
0
ModelGauge m3 Fuel Gauge
of the cell by comparing against the calculated pres-
ent capacity stored in the FullCAP register. DesignCap
has an LSb equal to 5.0FVh and a full range of 0 to
327.68mVh. The user should multiply the mAh capac-
ity of the cell by the sense resistor value to determine
the FVh value to store in the DesignCap register. The
DesignCap register format is shown in
The FullSOCThr register gates detection of end-of-
charge. SOC
value
AverageCurrent register value. The recommended
FullSOCThr register setting for most applications is 95%.
See the ICHGTerm register description for details. The
FullSOCThr register is 70% at power-up.
FullSOCThr register format.
MSb
2
(0.5mAh WHEN R
MSb
2
(0.5mAh WHEN R
MSb
2
2
2
0
0
-8
0
2
2
-1
7
7
UNITS: 5.0FVh/R
UNITS: 5.0FVh/R
UNITS: 1.0%
UNITS: 0.0039%
MAX17047/MAX17050
before
2
2
2
-2
6
6
VF
2
2
2
LSB—ADDRESS 4Dh
LSB—ADDRESS 23h
LSB—ADDRESS 18h
-3
5
5
SENSE
SENSE
must be larger than the FullSOCThr
ICHGTerm
SENSE
SENSE
2
2
2
-4
4
4
FullSOCThr Register (13h)
= 0.010I)
= 0.010I)
2
2
2
-5
3
3
is
2
2
2
-6
2
2
compared
Figure
2
2
2
-7
Figure 25
1
1
LSb
LSb
LSb
24.
2
2
2
-8
0
0
to
is the
the
20