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Advanced, Smart Battery-Pack Controllers

Industry's Smallest SBS-Compliant Battery Fuel Gauge with nFET Protection Drivers

Product Details

Key Features

Simplified Block Diagram

Technical Docs

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Sampling:
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Key Features

  • Accurate Fuel Gauge Uses V-to-F Method
    • < 1µV Input Offset Voltage
    • < 1% Gain Error
    • 139nAh Resolution (5mΩ)
    • No Calibration Required
  • 8-Bit RISC Microcontroller Core
  • 8kB of Program Flash
  • 12kB of Program ROM
  • 512 Bytes of Data Flash
  • 648 Bytes of RAM
  • 12-Bit ADC
  • Watchdog Timer
  • In-System Debug
  • Eliminates Separate Primary-Protection IC
    • Individual Cell-Voltage Measurements with 0.5% Accuracy
    • n-Channel MOSFET Gate Drivers
    • Low-Current Charge Pump
    • 8% Accurate Overcurrent Protection
    • Programmable Overcurrent Delay Timers
  • 3-Pin, 6-LED PWM Driver (Only for MAX1789)
  • Random-Number Generator (RNG) for Encryption
  • SMBus v1.1 Compliant with Master Capability
  • Typical Operating Current < 250µA
  • Typical Shutdown Current < 10nA
  • Integrated 32kHz Oscillator: No Crystal
  • Fully Integrated LDO (VIN = +4V to +25V)

Applications/Uses

  • Data-Acquisition Systems
  • Notebook Battery Packs
  • Proprietary Battery Packs
  • Remote Data Logging

Description

The MAX1789/MAX17892 smart battery-pack controllers integrate a user-programmable microcontroller core, a coulomb-counting fuel gauge, a multichannel data-acquisition unit, and a system management bus (SMBus™) v1.1-compliant master/slave SMBus interface. The 8-bit, RISC microcontroller core has an integrated 8kB of user-programmable flash and a 12kB program ROM library, which provides battery-pack designers with complete flexibility in developing fuel gauging and control algorithms. The MAX1789/MAX17892 are equipped with in-system debug (ISD) capability for efficient development and debugging.

The MAX1789/MAX17892 include a 12-bit data-acquisition unit to measure individual cell voltages, thermistors, current, and pack voltage. 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 MAX1789/MAX17892 have a wide +4V to +25V operating voltage range. The MAX1789/MAX17892 are available in a lead-free, 28-pin TSSOP package. The MAX1789/MAX17892 evaluation kit is available to assist with development.

Simplified Block Diagram

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 .

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.