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5.2µA 1-Cell Fuel Gauge with ModelGauge m5 EZ and Internal Current Sensing

Industry's Lowest IQ Fuel Gauge with Internal Rsense and ModelGauge m5 EZ Eliminates Battery Characterization

Product Details

The MAX17262 is an ultra-low power fuel-gauge IC which implements the Maxim ModelGauge™ m5 algorithm. The MAX17262 monitors a single cell battery pack with integrated internal current sensing for up to 3.1A pulse current. The IC monitors a single-cell battery pack and supports internal current sensing for up to 3.1A pulse current. The IC provides best performance for batteries with 100mAhr to 6Ahr capacity.

The 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.

The 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 IC automatically compensates for cell-aging, temperature, and discharge rate, and provides accurate state-of-charge (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 ModelGauge m5 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 re- sistance, 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 wafer-level package (WLP).

Design Solution: Choose a Fuel Gauge with the Right Current Sensing for Your Battery System ›

Key Features

  • 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, Temperature
    • Does Not Require Empty, Full, or Idle States
  • Low 5.2µA Operating Current
  • Integrated Current Sensing
    • 7mΩ Typical, up to 3.1A Pulse Currents
  • Supports Li+ and Variants Including LiFePO4
  • Thermistor or ±1°C Internal Temperature
  • 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
  • No Calibration Required
  • Alert Indicator for Voltage, SOC, Temperature, Current, and 1% SOC Change

Applications/Uses

  • Bluetooth Headset Cases
  • Handheld Computers and Terminals
  • Health and Fitness Monitors
  • Home and Building Automation, Sensors
  • Medical Devices
  • Toys
  • Wearables and Smartwatches
Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Fuel Gauge
Battery Type 1 Cell Li-Ion
Fuel Gauge Algorithm ModelGauge m5
Interface 2-Wire
Parameters Measured Current
State of Charge
Temperature
Voltage
Applications Host
VSUPPLY (V) (min) 2.3
VSUPPLY (V) (max) 4.9
Package/Pins WLP/9
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
$1.00 @1k
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Simplified Block Diagram

MAX17262: Simple Fuel-Gauge Circuit Diagram MAX17262: Simple Fuel-Gauge Circuit Diagram Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX17262X evaluation kit (EV kit) is a fully assembled and tested surface-mount PCB that evaluates the stand-alone ModelGauge™ m5 host-side fuel-gauge IC for lithium-ion (Li+) batteries in handheld and portable equipment.

The MAX17262X EV kit includes the Maxim DS91230+ USB interface, IC evaluation board, and RJ-11 connection cable. Windows®-based graphical user interface (GUI) software is available for use with the EV kit and can be downloaded from Maxim’s website at www.maximintegrated.com/products/MAX17262 (under the Design Resources tab). Windows 7 or newer Windows operating system is required to use with the EV kit GUI software.

View Details

Features

  • ModelGauge m5 Algorithm
  • Monitors from 1S Cell Packs
  • Battery Pack Input Voltage Range of +2.3V to +4.9V
  • Thermistor Measurement Network
  • Windows 7 or Newer Compatible Software
  • Proven PCB Layout
  • Fully Assembled and Tested

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Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal

Parameters

Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Fuel Gauge
Battery Type 1 Cell Li-Ion
Fuel Gauge Algorithm ModelGauge m5
Interface 2-Wire
Parameters Measured Current
State of Charge
Temperature
Voltage
Applications Host
VSUPPLY (V) (min) 2.3
VSUPPLY (V) (max) 4.9
Package/Pins WLP/9
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
$1.00 @1k

Key Features

  • 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, Temperature
    • Does Not Require Empty, Full, or Idle States
  • Low 5.2µA Operating Current
  • Integrated Current Sensing
    • 7mΩ Typical, up to 3.1A Pulse Currents
  • Supports Li+ and Variants Including LiFePO4
  • Thermistor or ±1°C Internal Temperature
  • 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
  • No Calibration Required
  • Alert Indicator for Voltage, SOC, Temperature, Current, and 1% SOC Change

Applications/Uses

  • Bluetooth Headset Cases
  • Handheld Computers and Terminals
  • Health and Fitness Monitors
  • Home and Building Automation, Sensors
  • Medical Devices
  • Toys
  • Wearables and Smartwatches

Description

The MAX17262 is an ultra-low power fuel-gauge IC which implements the Maxim ModelGauge™ m5 algorithm. The MAX17262 monitors a single cell battery pack with integrated internal current sensing for up to 3.1A pulse current. The IC monitors a single-cell battery pack and supports internal current sensing for up to 3.1A pulse current. The IC provides best performance for batteries with 100mAhr to 6Ahr capacity.

The 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.

The 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 IC automatically compensates for cell-aging, temperature, and discharge rate, and provides accurate state-of-charge (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 ModelGauge m5 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 re- sistance, 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 wafer-level package (WLP).

Design Solution: Choose a Fuel Gauge with the Right Current Sensing for Your Battery System ›

Simplified Block Diagram

MAX17262: Simple Fuel-Gauge Circuit Diagram MAX17262: Simple Fuel-Gauge Circuit Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal