MAX17050EVKIT# Maxim Integrated, MAX17050EVKIT# Datasheet - Page 8

• 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 MAX17047/MAX17050 incorporate the Maxim
ModelGauge m3 algorithm that combines the excellent
short-term accuracy and linearity of a coulomb counter
with the excellent long-term stability of a voltage-based
fuel gauge, along with temperature compensation to pro-
vide industry-leading fuel-gauge accuracy. ModelGauge
m3 cancels offset accumulation error in the coulomb
counter, while providing better short-term accuracy than
any purely voltage-based fuel gauge. Additionally, the
ModelGauge m3 algorithm does not suffer from abrupt
corrections that normally occur in coulomb-counter algo-
rithms, since tiny continual corrections are distributed
over time.
The device automatically compensates for aging, tem-
perature, and discharge rate and provides accurate
state-of-charge (SOC) in mAh or % over a wide range of
operating conditions. The device provides two methods
for reporting the age of the battery: reduction in capacity
and cycle odometer.
The device provides precision measurements of current,
voltage, and temperature. Temperature of the battery
Maxim Integrated
0.1µF
PK-
PK+
0.1µF
10nF
PK+
Detailed Description
PK-
PK-
REG
V
(MAX17047 ONLY)
THRM
V
TT
THRM
V
BATT
- V
DETR
AIN
P
/V
DETF
IN
OUT
2V LDO
PK-
CSP
BATTERY
REMOVAL
DETECT
10mI
RSNS
OCV CALCULATION
32kHz OSCILLATOR
ModelGauge m3 Fuel Gauge
MAX17047
MAX17050
V
BATT
CSN
pack is measured using an external thermistor supported
by ratiometric measurements on an auxiliary input. A
2-wire (I
registers. The MAX17047 is available in a 3mm x 3mm,
10-pin TDFN package. The MAX17050 is available in a
0.4mm pitch 9-bump WLP package.
The ModelGauge m3 algorithm combines a high-accura-
cy coulomb counter with a voltage fuel gauge (VFG) as
represented in
Classical coulomb-counter-based fuel gauges have
excellent linearity and short-term performance. However,
they suffer from drift due to the accumulation of the offset
error in the current-sense measurement. Although the
offset error is often very small, it cannot be eliminated,
causes the reported capacity error to increase over
time, and requires periodic corrections. Corrections are
usually performed at full or empty. Some other systems
also use the relaxed battery voltage to perform correc-
tions. These systems determine the SOC based on the
battery voltage after a long time of no current flow. Both
have the same limitation: if the correction condition is not
MUX
SYSTEM GROUND
MAX17047/MAX17050
12-BIT ADC
2
C) interface provides access to data and control
REF ADC
ModelGauge m3 Algorithm
REF
Figure
ModelGauge m3
ALGORITHM
INTERFACE
2.
I
2
C
Block Diagram
CSP
ALRT
SDA
SCL
8