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1-Cell/2-Cell Fuel Gauge with ModelGauge

Smarten Up Your Dumb Battery!

Product Details

Key Features

Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Fuel Gauge
Battery Type 2 Cell Li-Ion
Fuel Gauge Algorithm ModelGauge
Interface 2-Wire
Parameters Measured State of Charge
Voltage
End Equipment Host
VSUPPLY (V) (min) 2.5
VSUPPLY (V) (max) 4.5
Package/Pins TDFN/8
WLP/9
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 2 Cell Li-Ion
Fuel Gauge Algorithm ModelGauge
Interface 2-Wire
Parameters Measured State of Charge
Voltage
End Equipment Host
VSUPPLY (V) (min) 2.5
VSUPPLY (V) (max) 4.5
Package/Pins TDFN/8
WLP/9
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
0

Key Features

  • Host-Side or Battery-Side Fuel Gauging
    • 1 Cell (MAX17040)
    • 2 Cell (MAX17041)
  • Precision Voltage Measurement
    • ±12.5mV Accuracy to 5.00V (MAX17040)
    • ±30mV Accuracy to 10.00V (MAX17041)
  • Accurate Relative Capacity (RSOC) Calculated from ModelGauge Algorithm
  • No Offset Accumulation on Measurement
  • No Full-to-Empty Battery Relearning Necessary
  • No Sense Resistor Required
  • 2-Wire Interface
  • Low Power Consumption
  • Tiny, Lead(Pb)-Free, 8-pin, 2mm x 3mm TDFN Package or Tiny 0.4mm Pitch 9-Bump UCSP 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 MAX17040/MAX17041 are ultra-compact, low-cost, host-side fuel-gauge systems for lithium-ion (Li+) batteries in handheld and portable equipment. The MAX17040 is configured to operate with a single lithium cell and the MAX17041 is configured for a dual-cell 2S pack.

The MAX17040/MAX17041 use a sophisticated Li+ battery-modeling scheme, called ModelGauge™ to track the battery's relative state-of-charge (SOC) continuously over a widely varying charge/discharge profile. Unlike traditional fuel gauges, the ModelGauge algorithm eliminates the need for battery relearn cycles and an external current-sense resistor. Temperature compensation is possible in the application with minimal interaction between a µC and the device.

The IC can be located on the system side, reducing cost and supply chain constraints on the battery. Measurement and estimated capacity data sets are accessed through an I²C interface. The MAX17040/MAX17041 are available in either a 0.4mm pitch 9-bump UCSP™ or 2mm x 3mm, 8-pin TDFN lead-free package.

Simplified Block Diagram

MAX17040, MAX17041: Simple Fuel Gauge Circuit Diagram MAX17040, MAX17041: 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 .