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Smart Battery-Pack Controller

Smallest, Most Efficient and Flexible Notebook Fuel-Gauging Solution

Product Details

Key Features

Simplified Block Diagram

Technical Docs

Data Sheet Smart Battery-Pack Controller Jun 13, 2008

Support & Training

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Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Key Features

  • Accurate Fuel Gauge Uses V-to-F Method
  • 8-Bit RISC Microcontroller Core
  • 32kB of Program Flash
  • 512 Bytes of Data Flash
  • 776 Bytes of RAM
  • 12-Bit ADC
  • Watchdog Timer
  • In-System Debug for Firmware Debugging
  • Integrated Development Environment

Applications/Uses

  • Notebook Battery Packs
  • Proprietary Battery Packs
  • Remote Data Logging

Description

The MAX1785 smart battery-pack controller integrates a user-programmable microcontroller core, a Coulomb-counting fuel gauge, a multichannel data-acquisition unit, and an SMBus™ v1.1-compliant master/slave interface. The 8-bit RISC microcontroller core has an integrated 32kB of user-programmable flash, which provides battery-pack designers with complete flexibity in developing fuel gauging and control algorithms. The MAX1785 is equipped with in-system debug (ISD) capability for efficient firmware development and debugging.

The MAX1785 includes a 12-bit data-acquisition unit to measure individual cell voltages, thermistor, instant current, and pack voltage. Individual cell voltage measurements with 0.5% accuracy and overcurrent protection allow the MAX1785 to eliminate a separate first-level protection IC. Internally adjustable overcurrent thresholds and delay timers provide a flexible solution.

The integrating fuel gauge module provides a typical input offset of less than 1µV and gain accuracy of better than 1% with no trimming required during pack manufacture. The MAX1785 has a wide 4V to 25V operating voltage range. The MAX1785 is available as a 38-pin TSSOP. The MAX1785 EV kit is available to assist with development.

Simplified Block Diagram

Technical Docs

Data Sheet Smart Battery-Pack Controller Jun 13, 2008

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 .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.