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1S/2S Fuel Gauges
MAX17043/MAX17044


Maxim's compact, low-cost 1S/2S fuel gauges with low-battery alert


Maxim's 1S/2S Fuel Gauges MAX17043/MAX17044Maxim's MAX17043/MAX17044 are ultra-compact, low-cost, host-side fuel gauge systems for lithium-ion (Li+) batteries in handheld and portable equipment. The MAX17043 is configured to operate with a single lithium cell, while the MAX17044 is configured for a dual-cell 2S pack.

The MAX17043 and MAX17044 each 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.

A quick-start mode provides a good initial estimate of the battery's SOC. This feature allows the IC to be located on system side, reducing cost and supply chain constraints on the battery. Measurement and estimated capacity data sets are accessed through an I²C interface. The MAX17043 and MAX17044 are available in either a 0.4 mm pitch, 9-bump UCSP™ or 2 mm x 3 mm, 8-pin TDFN lead-free package.

Features
  • Tiny, lead-free, 8-pin, 2 mm x 3 mm TDFN package or 0.4 mm pitch 9-bump UCSP package
  • Accurate relative capacity (RSOC) calculated from ModelGauge algorithm
  • ±12.5 mV accuracy to 5.00 V (MAX17043)
  • ±30 mV accuracy to 10.00 V (MAX17044)
  • No offset accumulation on measurement
  • No full-to-empty battery relearning necessary
  • 1 Cell (MAX17043)
  • Accurate relative capacity (RSOC) calculated from ModelGauge algorithm
  • 2-Wire interface
  • Precision voltage measurement
  • Low power consumption
  • No sense resistor required
  • 2 Cell (MAX17044)
  • External alarm/interrupt for low-battery warning

Applications
  • Handheld and portable applications
  • Digital still cameras
  • GPS systems
  • Portable DVD players
  • MP3 players
  • Smartphones

Digi-Key P/N Manufacturer P/N Description
MAX17043X+-ND MAX17043X+ IC FUEL GAUGE LI-ION 9UCSP Datasheet
MAX17044X+-ND MAX17044X+ IC FUEL GAUGE LI-ION 9UCSP