MAX17261MEWL+T Analog Devices

EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX17261 5.1A Multi-Cell Fuel Gauge with ModelGauge m5 EZ General Description Benefits and Features The MAX17261 is an ultra-low power fuel gauge IC which ModelGauge m5 EZ implements the Maxim ModelGauge m5 algorithm. The No Characterization Required for EZ Performance IC monitors a multiple-series cell battery pack with an ex- Robust Against Battery Variation ternal resistor divider. Eliminates Error Near Empty Voltage Eliminates Coulomb Counter Drift The ModelGauge m5 EZ algorithm makes fuel gauge im- Compensates for Age, Current, and Temperature plementation easy by eliminating battery characterization Does Not Require Empty, Full, or Idle States requirements and simplifying host software interac- tion. The algorithm provides tolerance against battery di- Low 5.1A Operating Current versity for most lithium batteries and applications. Monitors Multiple-Cell Battery Pack Wide Sense Resistor Range: 1m to 1000m The algorithm combines the short-term accuracy and lin- PCB Metal Sensing + Temperature Compensation earity of a coulomb counter with the long-term stability of Supports Li+ and Variants Including LiFePO 4 a voltage-based fuel gauge, along with temperature com- Thermistor or 1C Internal Temperature pensation to provide industry-leading fuel gauge accura- Dynamic Power Estimates Power Capability During cy. The IC automatically compensates for cell-aging, tem- Discharge perature, discharge rate, and provides accurate state-of- Time-to-Empty and Time-to-Full Estimation charge (SOC) in percentage (%) and remaining capacity Predicts Remaining Capacity Under Theoretical Load in milliampere-hours (mAh) over a wide range of operat- No Calibration Required ing conditions. As the battery approaches the critical re- Alert Indicator for Voltage, SOC, Temperature, gion near empty, the algorithm invokes a special correc- Current and 1% SOC Change tion mechanism that eliminates any error. The IC provides accurate estimation of time-to-empty and time-to-full and Ordering Information appears at end of data sheet. provides three methods for reporting the age of the bat- tery: reduction in capacity, increase in battery resistance, Simple Fuel Gauge Circuit Diagram and cycle odometer. The IC provides precision measurements of current, volt- SYSPWRSYSPWR age, and temperature. The temperature of the battery pack is measured using an internal temperature sensor or 3~5V BATT 2 REG external thermistor. A 2-wire I C interface provides access 0.1F 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 pack- REG 0.47F age and 3mm x 3mm, 14-pin TDFN package. CELLX MAX17261MAX17261 ALRT Applications SDA SCL PROTECTION Tablets, 2-in-1 Laptops CIRCUIT Digital Still, Video, and Action Cameras TH Medical Devices CSPL (TDFN) GND EP (TDFN) CSN Handheld Computers and Terminals 10k Financial Terminals NTC Mobile Printers R SENSE Augmented/Virtual Reality Devices SYSGNDSYSGND Robots E-Bikes Battery Backups Wireless Speakers ModelGauge is a trademark of Maxim Integrated Products, Inc. 19-100318 Rev 0 5/18MAX17261 5.1A Multi-Cell Fuel Gauge with ModelGauge m5 EZ TABLE OF CONTENTS General Description 1 Applications 1 Benefits and Features 1 Simple Fuel Gauge Circuit Diagram . 1 Absolute Maximum Ratings 6 Package Information . 6 WLP . 6 TDFN 6 Electrical Characteristics . 7 Typical Operating Characteristics . 9 Pin Configurations . 11 TDFN . 11 WLP 11 Pin Descriptions . 12 Functional Diagram . 13 Detailed Description 14 ModelGauge m5 EZ Performance . 14 Application Notes 15 Standard Register Formats . 15 ModelGauge m5 EZ Configuration Registers . 16 DesignCap Register (18h) . 16 VEmpty Register (3Ah) 16 ModelCfg Register (DBh) 17 IChgTerm Register (1Eh) 17 Config Register (1Dh) and Config2 Register (BBh) 17 ModelGauge m5 EZ Algorithm 19 ModelGauge m5 Algorithm Output Registers . 20 RepCap Register (05h) . 20 RepSOC Register (06h) . 21 FullCapRep Register (10h) . 21 TTE Register (11h) . 21 TTF Register (20h) . 21 Cycles Register (17h) . 21 Status Register (00h) . 21 Analog Measurements 22 Voltage Measurement 22 VCell Register (09h) 22 www.maximintegrated.com Maxim Integrated 2