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Advanced, Smart Battery-Pack Controller

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

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • ModelGauge™ m3 Algorithm
    • Long-Term Influence by Voltage Fuel Gauge Cancels Coulomb-Counter Drift
    • Short-Term Influence by Coulomb Counter Provides Excellent Linearity
    • Does Not Require Empty, Full, or Idle States to Maintain Accuracy
  • 16-Bit MAXQ Microcontroller Core
  • 32k x 16 Program Flash
  • 4k x 16 Program ROM
  • 1024 x 16 RAM
  • 512 x 16 Data Flash
  • Accurate Fuel Gauge Uses V-to-F Method
    • 1µV Input Offset Voltage
    • 1% Gain Error
    • 138nAh Resolution (5mΩ)
    • No Calibration Required
  • 12-Bit ADC
  • Integrated Development Environment (IDE)
    • C Compiler
    • Inline Assembler
  • Eliminates Separate Primary-Protection IC
    • Individual Cell-Voltage Measurements with 0.5% Accuracy
    • n-Channel MOSFET Gate Drivers
    • Low-Current Charge Pump for Pass FET Drive
    • 8% Accurate Overcurrent Protection
    • Programmable Overcurrent Delay Timers
  • 3-Pin, 6-LED PWM Driver
  • SMBus v1.1 Compliant with Master Capability
  • Typical Shutdown Current of 1nA
  • Integrated 32kHz Oscillator: No Crystal
  • Fully Integrated 3.4V and 1.9V LDOs
  • Applications/Uses

    Description

    The MAX17801 smart battery-pack controller integrates a user-programmable 16-bit MAXQ® microcontroller core, a coulomb-counting fuel gauge, a multichannel data-acquisition unit, and an SMBus v1.1-compliant master/slave SMBus interface. The 16-bit RISC microcontroller core integrates 32k words of user-programmable flash along with 4k words of ROM, which provide battery-pack designers with complete flexibility in developing fuel gauging and control algorithms. The IC is equipped with in-system debug (ISD) capability for efficient firmware development and debugging.

    The device includes 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 IC has a wide 3.5V to 25V operating voltage range. The IC is available as a 38-pin TSSOP. The MAX17801 EV kit is available to assist with development.

    Simplified Block Diagram

    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 .