EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX17261 5.1ОјA Multi-Cell Fuel Gauge
with ModelGauge m5 EZ General Description Benefits and Features The MAX17261 is an ultra-low power fuel gauge IC which
implements the Maxim ModelGaugeв„ў m5 algorithm. The
IC monitors a multiple-series cell battery pack with an external resistor divider. в—Џ ModelGauge m5 EZ No Characterization Required for EZ Performance Robust Against Battery Variation Eliminates Error Near Empty Voltage Eliminates Coulomb Counter Drift Compensates for Age, Current, and Temperature Does Not Require Empty, Full, or Idle States The ModelGauge m5 EZ algorithm makes fuel gauge implementation easy by eliminating battery characterization
requirements and simplifying host software interaction. The algorithm provides tolerance against battery diversity for most lithium batteries and applications.
The algorithm combines the short-term accuracy and linearity of a coulomb counter with the long-term stability of
a voltage-based fuel gauge, along with temperature compensation to provide industry-leading fuel gauge accuracy. The IC automatically compensates for cell-aging, temperature, discharge rate, and provides accurate state-ofcharge (SOC) in percentage (%) and remaining capacity
in milliampere-hours (mAh) over a wide range of operating conditions. As the battery approaches the critical region near empty, the algorithm invokes a special correction mechanism that eliminates any error. The IC provides
accurate estimation of time-to-empty and time-to-full and
provides three methods for reporting the age of the battery: reduction in capacity, increase in battery resistance,
and cycle odometer.
The IC provides precision measurements of current, voltage, and temperature. The temperature of the battery
pack is measured using an internal temperature sensor or
external thermistor. A 2-wire I2C interface provides access
to data and control registers. The IC is available in a tiny
lead-free 0.4mm pitch, 1.5mm x 1.5mm, 9-pin WLP package and 3mm x 3mm, 14-pin TDFN package. в—Џ
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