MAX17801

Advanced, Smart Battery-Pack Controller

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

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Overview

  • 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

    • 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.
    MAX17801
    Advanced, Smart Battery-Pack Controller
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