Overview

Features and Benefits

  • AECQ-100 Grade 1 Temperature Range -40°C to 125°C
  • 65V Operating Voltage
  • Ultra-Low-Power Operation
    • Standby Mode: 2mA
    • Shutdown Mode: 2µA
  • Redundant ADC and Comparator (COMP) Acquisitions
  • Simultaneous Cell and Bus-Bar Voltage Acquisitions
  • 14 Cell-Voltage Measurement Channels
    • 1mV Accuracy (3.6V, 25°C)
    • 2mV Accuracy (5°C to 40°C)
    • 4.5mV Accuracy (-40°C to +125°C)
  • 14 Cell-Balancing Switches
    • > 300mA Software-Programmable Balancing Current
    • Optimized Driving and Parking Balancing Modes
    • Automated Balancing with Individual Cell Timers
    • Automated Balancing by Cell Voltage
    • Emergency Discharge Mode
  • Six Configurable Auxiliary Inputs for Temperature, Voltage, or GPIO
  • Integrated Die-Temperature Measurement
  • Automatic Thermal Protection
  • Individually Configurable Safety Alert
    • Overvoltage, Undertemperature Faults
    • Undervoltage, Overtemperature Faults
    • One Cell-Mismatch Alert
  • Support ASIL D Requirements for Cell Voltage, Temperature, Communication
  • Selectable UART, Dual UART, or SPI Interface
  • Battery-Management UART Protocol
    • Daisy-Chain Up to 32 Devices
    • Capacitive Communication-Port Isolation
    • Up to 2Mbps Baud Rate (auto-detect)
    • 1.5µs Propagation Delay (per device)
    • Packet-Error Checking (PEC)
  • Configurable Hardware-Alert Interfaces
  • Factory-Trimmed Oscillator
    • No External Crystals Required
  • 32-Bit Unique Device ID
  • 64-Pin (10mm x 10mm) LQFP Package

Product Details

The MAX17853 is a flexible data-acquisition system for the management of high-voltage and low-voltage battery modules. The system can measure 14 cell voltages and a combination of six temperatures or system voltage measurements with fully redundant measurement engines in 263µs, or perform all inputs solely with the ADC measurement engine in 156µs. There are 14 internal balancing switches rated for > 300mA for cell-balancing current, each supporting extensive built-in diagnostics. Up to 32 devices can be daisy-chained to manage 448 cells and monitor 192 temperatures.

Cell and bus-bar voltages ranging from -2.5V to +5V are measured differentially over a 65V common-mode range, with a typical accuracy of 1mV (3.6V cell, 25°C).If oversampling is enabled, up to 128 measurements per channel can be averaged internally with 14-bit resolution and combined with digital post-processing IIR filtering for increased noise immunity. The system can shut itself down in the event of a thermal overload by measuring its own die temperature.

For robust communications, the system uses a Maxim battery-management UART or SPI protocol, and is optimized to support a reduced feature set of internal diagnostics and rapid-alert communication through both embedded communication and hardware-alert interfaces to support ASIL D and FMEA requirements.


Also see: EV Powertrain ›

Applications

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

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Reference Designs (3)

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

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Evaluation Boards

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.