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1-Cell Fuel Gauge with ModelGauge m3

1-Cell Fuel Gauge with ModelGauge m3

Product Details

Key Features

Applications/Uses

Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Fuel Gauge
Battery Type 1 Cell Li-Ion
Fuel Gauge Algorithm ModelGauge m3
Interface 2-Wire
Parameters Measured Current
State of Charge
Temperature
Voltage
End Equipment Host
VSUPPLY (V) (min) 2.5
VSUPPLY (V) (max) 4.5
Package/Pins TDFN/10
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
0
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Simplified Block Diagram

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Parameters

Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Fuel Gauge
Battery Type 1 Cell Li-Ion
Fuel Gauge Algorithm ModelGauge m3
Interface 2-Wire
Parameters Measured Current
State of Charge
Temperature
Voltage
End Equipment Host
VSUPPLY (V) (min) 2.5
VSUPPLY (V) (max) 4.5
Package/Pins TDFN/10
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
0

Key Features

  • Accurate Battery-Capacity and Time-To-Empty Estimation
    • Temperature, Age, and Rate Compensated
    • Does Not Require Empty, Full, or Idle States to Maintain Accuracy
  • Precision Measurement System
    • No Calibration Required
  • ModelGauge m3 Algorithm
    • Long-Term Influence by Voltage Fuel Gauge Cancels Coulomb-Counter Drift
    • Short-Term Influence by Coulomb Counter Provides Excellent Linearity
    • Adapts to Cell Characteristics
  • External Temperature-Measurement Network
    • Actively Switched Thermistor Resistive Divider Reduces Current Consumption
  • Low Quiescent Current
    • 25µA Active, < 0.5µA Shutdown
  • Alert Indicator for SOC, Voltage, Temperature, and Battery Removal/Insertion Events
  • AtRate Estimation of Remaining Capacity
  • 2-Wire (I2C) Interface
  • Tiny, Lead(Pb)-Free, 3mm x 3mm, 10-Pin TDFN Package or Tiny 0.4mm Pitch 9-Bump WLP Package

Applications/Uses

  • Digital Still, Video and Action Cameras
  • Handheld Computers and Terminals
  • Health and Fitness Monitors
  • Medical Devices
  • Smartphones, Tablets
  • Wireless Speakers

Description

The MAX17050 remains in production, however, for new projects, we recommend ModelGauge m5 MAX17055 fuel gauge.

The MAX17047/MAX17050 incorporate the Maxim ModelGauge m3 algorithm that combines the excellent short-term accuracy and linearity of a coulomb counter with the excellent long-term stability of a voltage-based fuel gauge, along with temperature compensation to provide industry-leading fuel-gauge accuracy. ModelGauge m3 cancels offset accumulation error in the coulomb counter while providing better short-term accuracy than any purely voltage-based fuel gauge. Additionally, the ModelGauge m3 algorithm does not suffer from abrupt corrections that normally occur in coulomb-counter algorithms since tiny continual corrections are distributed over time.

The device automatically compensates for aging, temperature, and discharge rate and provides accurate state of charge (SOC) in mAh or %, as well as time-to-empty over a wide range of operating conditions. The device provides two methods for reporting the age of the battery: reduction in capacity and cycle odometer.

The device provides precision measurements of current, voltage, and temperature. Temperature of the battery pack is measured using an external thermistor supported by ratiometric measurements on an auxiliary input. A 2-wire (I2C) interface provides access to data and control registers. The MAX17047 is available in a lead(Pb)-free, 3mm x 3mm, 10-pin TDFN package. The MAX17050 is available in a 0.4mm pitch 9-bump WLP package.

Simplified Block Diagram

Integrating the Maxim ModelGauge™ m3 algorithm that combines the excellent short-term accuracy and linearity of a coulomb counter | Block Diagam Integrating the Maxim ModelGauge™ m3 algorithm that combines the excellent short-term accuracy and linearity of a coulomb counter | Block Diagam 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 .