New Product

MAXIM INTEGRATED MAX17320 ModelGauge m5 EZ Fuel Gauge | New Product Brief

February 27, 2021 by Mouser Electronics

This New Product Brief (NPB) is part of a video series highlighting the features, applications, and technical specs of newly-released products.

MAXIM INTEGRATED MAX17320 ModelGauge m5 EZ Fuel Gauge

Maxim Integrated’s MAX17320 ModelGauge m5 EZ Fuel Gauge is a pack-side fuel gauge IC with built-in battery health, safety, protection, and authentication functions for 2 to 4 series lithium-ion or lithium polymer batteries.  

The IC monitors the voltage, current, temperature, and state of the battery and provides cell balancing with internal FETs, and has a very low quiescent current.  It includes internal self-discharge detection and protection functions to prolong the life of the battery and prevent safety issues.  It uses Maxim’s ModelGauge m5 algorithm for industry-leading fuel gauge accuracy, with automatic compensation for cell aging, temperature, and discharge rate.  

To prevent cloning, the MAX17320 has integrated SHA-256 authentication with a 160-bit secret key and unique 64-bit ID.  It also has a configurable always-on LDO to power small critical system-side loads without overloading the cells. 

  • Monitors voltage, current, temperature, and state of the battery 
    • Cell balancing with internal FETs 
    • IQ: 38µA Active, FETs enabled 
  • Battery internal self-discharge detection 
  • Programmable safety/protection 
    • Prolongs the life of the battery 
    • Prevents safety problems 
  • ModelGauge m5 EZ Algorithm: industry-leading fuel gauge accuracy 
    • Short-term accuracy/linearity of coulomb counter 
    • Long-term stability of voltage-based fuel gauge 
  • SHA-256 authentication to prevent cloning 
    • 160-bit secrete key 
    • 64-bit unique ID 
  • Configurable Always-On LDO 
    • Power small critical, system-side loads without overloading the cells even under fault conditions 

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