MAX17853

14-Channel High-Voltage Data-Acquisition System

Industry's Leading ASIL D Battery Monitor ASIC


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Description

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.

Key Features

  • 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

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
Part NumberFunctionsBattery TypeInterfaceParameters MeasuredApplicationsBattery ProtectionVSUPPLY
(V)
VSUPPLY
(V)
Package/PinsOper. Temp.
(°C)
minmax
MAX17853 NEW!Status Monitor
1-12 Cell Li-Ion
3-16 Cell Li-Ion
Multi-Cell Li-Ion
SPI
UART
Temperature
Voltage
Host
Pack
Over Voltage
Over-Current
Over-Temperature
Over/Under Voltage
965
LQFP/64
-40 to +125
See All Battery Monitors, Protectors, and Selectors (45)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX17853EVKIT: Evaluation Kit for the MAX17853

Quality and Environmental Data

Request Reliability Report for: MAX17853 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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