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12-Channel, High-Voltage Data-Acquisition Systems

Meets Toughest Automotive and Industrial OEM Requirements for Safety, Performance, Reliability with Balancing Currents

Product Details

Key Features

Applications/Uses

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Key Features

  • AEC-Q100 Grade 2 Temperature Range
    • -40°C to 105°C
  • Operating Voltage from 9V to 65V
  • Ultra-Low Power Operation
    • Standby Mode: 2mA
    • Shutdown Mode: 2µA
  • 12 Cell-Voltage Measurement Channels
    • 2mV Accuracy (3.6V, +25°C)
    • 5mV Accuracy (0°C to +45°C)
    • 10mV Accuracy (-40°C to +105°C)
  • 12 Cell-Balancing Switches
    • Up to 650mA per switch
    • Emergency Discharge Mode
  • 2 Temperature Measurement Channels
  • Die Temperature Measurement
  • Automatic Thermal Protection
  • 29 Voltage Threshold Alerts
    • 12 Overvoltage Faults
    • 12 Undervoltage Faults
    • 2 Overtemperature Faults
    • 2 Undertemperature Faults
    • 1 Cell Mismatch Alert
  • 4 GPIOs
  • Built-in Diagnostics to Support ASIL-D and FMEA Requirements
  • Battery-Management UART Protocol
    • Daisy-Chain up to 32 Devices
    • Communication Port Isolation
    • Up to 2 Mbps Baud Rate (auto-detect)
    • 1.5µs Propagation Delay per Device
    • Packet-Error Checking (PEC)
  • Factory-Trimmed Oscillators
    • No External Crystals Required
  • 10mm x 10mm Package (64-pin LQFP)

Applications/Uses

  • Battery-Backup Systems (UPS)
  • Battery-Powered Tools
  • Electric Bikes
  • Electric Vehicles (EVs)
  • High-Voltage Battery Stacks
  • Hybrid Electric Vehicles (HEVs)
  • Super-Cap Systems

Description

The MAX17823H is a data acquisition system for the management of high-voltage battery modules. The system features a 12-bit SAR ADC that can measure 12 cell voltages and two temperatures in 161 µs. There are 12 internal switches for cell-balancing and extensive built-in diagnostics. Up to 32 devices can be daisy-chained together to manage 384 cells and monitor 64 temperatures.

Cell voltages (0V to 5V) are measured differentially over a 65V common-mode range. Cell measurements have a typical accuracy of 2mV (3.6V cell, 25°C). If oversampling is enabled, up to 128 measurements per channel can be averaged internally with 14-bit resolution. The system can shut itself down in the event of a thermal overload by measuring its own die temperature.

The system uses Maxim’s battery-management UART protocol for robust communications and, when used in conjunction with the MAX17880 12-channel battery monitor, is ideal for automotive battery-management systems that require a high safety-integrity level.

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 .