MAX17055ETB+T

The MAX17055 is a low 7μA operating current fuel gauge that implements Maxim ModelGauge m5 EZ algorithm. ModelGauge m5 EZ makes fuel gauge implementation easy by eliminating battery characterization requirements and simplifying host software interaction. The ModelGauge m5 EZ robust algorithm provides tolerance against battery diversity for most lithium batteries and applications. ModelGauge m5 EZ 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 MAX17055 automatically compensates for cell aging, temperature, and discharge rate, and provides accurate state of charge (SOC in %) and remaining capacity in milliampere - hours (mAh). As the battery approaches the critical region near empty, the ModelGauge m5 algorithm invokes a special compensation that eliminates any error. It also provides three methods for reporting the age of the battery: reduction in capacity, increase in battery resistance, and cycle odometer. The MAX17055 provides precision measurements of current, voltage, and temperature. Temperature of the battery pack is measured using an internal temperature measurement or external thermistor. A 2 - wire I2C interface provides access to data and control registers. The MAX17055 is available in a tiny, lead - free 0.4mm pitch 1.4mm×1.5mm, 9 - pin WLP package, and a 2mm x 2.5mm, 10 - pin TDFN package.

Applications

• Wearables, Smartwatches
• Smartphones
• Tablets, 2 - in - 1 Laptops
• Bluetooth Headsets
• Health and Fitness Monitors
• Digital Still, Video, and Action Cameras
• Medical Devices
• Handheld Computers and Terminals
• Wireless Speakers
• Home and Building Automation, Sensors
• Portable Game Players Toys

Key features

• No Characterization Required for EZ Performance
• Robust Against Battery Variation
• Eliminates Error Near Empty Voltage
• Eliminates Coulomb Counter Drift
• Current, Temperature, and Age Compensated
• Does Not Require Empty, Full, or Idle States
• Low 7μA Operating Current
• Wide Sense Resistor Range: 1mΩ to 1000mΩ, PCB Metal Sensing
• Temperature Compensation
• Supports Li+ and Variants Including LiFePO4
• ±1°C Internal Temperature or Thermistor
• Dynamic Power Estimates
• Power Capability During Discharge
• Time - to - Empty and Time - to - Full Estimation: Constant Power or Constant Current
• Predicts Remaining Capacity Under Theoretical Load
• Precision Measurement System: No Calibration Required
• Alert Indicator for Voltage, SOC, Temperature, Current and 1% SOC Change