MAX17050EVKIT# Maxim Integrated, MAX17050EVKIT# Datasheet - Page 9

• 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 2. ModelGauge m3 Overview
observed over time in the actual application, the error in
the system is boundless. The performance of classic
coulomb counters is dominated by the accuracy of such
corrections.
Classical voltage-measurement-based SOC estimation
has poor accuracy due to inadequate cell modeling, but
does not accumulate offset error over time.
The device includes an advanced VFG, which estimates
open-circuit voltage (OCV), even during current flow, and
simulates the nonlinear internal dynamics of a lithium-ion
(Li+) battery to determine the SOC with improved accu-
racy. The model considers the time effects of a battery
caused by the chemical reactions and impedance in the
battery to determine SOC based on table lookup. This
SOC estimation does not accumulate offset error over time.
The ModelGauge m3 algorithm combines a high-accu-
racy coulomb counter with a VFG. The complementary
Maxim Integrated
DETECTION
RELAXED
CELL
COMPENSATION LEARN
OCV TEMPERATURE-
CAPACITY LEARN
TEMPERATURE
mAh PER %
CURRENT
VOLTAGE
VOLTAGE FUEL GAUGE
OCV CALCULATION
END-OF-CHARGE
COMPENSATION
APPLICATION
OCV OUTPUT
DETECTION
DETECTION
EMPTY
EMPTY
ModelGauge m3 Fuel Gauge
combined result eliminates the weaknesses of both the
coulomb counter and the VFG, while providing the
strengths of both. A mixing algorithm combines the VFG
capacity with the coulomb counter and weighs each
result so that both are used optimally to determine the
battery state. In this way, the VFG capacity result is used
to continuously make small adjustments to the battery
state, canceling the coulomb-counter drift.
The ModelGauge m3 algorithm uses this battery state
information and accounts for temperature, battery cur-
rent, age, and application parameters to determine the
remaining capacity available to the system.
The ModelGauge m3 algorithm continually adapts to the
cell and application through independent learning rou-
tines. As the cell ages, its change in capacity is monitored
and updated and the VFG dynamics adapt based on cell-
voltage behavior in the application.
% REMAINING OUTPUT
OCV TABLE LOOKUP
MAX17047/MAX17050
SOC
RemCap
SOC
RemCap
TTE
FullCAP
APPLICATION
OUTPUTS:
REP
AV
REP
AV
MIXING ALGORITHM
mAh OUTPUT
RemCap
SOC
MIX
MIX
COULOMB COUNTER
CELL CHEMISTRY
OCV
CYCLES
R
FullCAPNom
AGE
mAh OUTPUT
CELL
OUTPUTS:
CURRENT
TIME
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