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ISL94212

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Multi-Cell Li-Ion Battery Manager

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NOTICE - The following device(s) are recommended alternatives:
RAA489204 - Multi-Cell Daisy-Chainable Li-Ion Battery Manager
Recommended for all new designs

Overview

The ISL94212 Li-ion battery manager IC supervises up to 12 series connected cells. The part provides accurate monitoring, cell balancing and extensive system diagnostics functions. Three cell balancing modes are provided: Manual Balancing mode, Timed Balancing mode and Auto Balance mode. The Auto Balance mode terminates balancing functions when a charge transfer value has been met. The ISL94212 communicates to a host microcontroller via an SPI interface and to other ISL94212 devices using a robust, proprietary, two-wire Daisy Chain system. The ISL94212 is offered in a 64 Ld TQFP package and is specified for an operational temperature range of -40°C to +85°C.

ISL94212 Functional Diagram
ISL94212 Functional Diagram
  • Up to 12-cell voltage monitors, support Li-Ion CoO2, Li-ion Mn2O4, and Li-ion FePO4 chemistries
  • Cell voltage measurement accuracy ±10mV
  • 13-bit cell voltage measurement
  • Pack voltage measurement accuracy ±180mV
  • 14-bit pack voltage and temperature measurements
  • Cell voltage scan rate of 19.5µs per cell (234µs to scan 12 cells)
  • Internal temperature monitoring
  • Up to four external temperature inputs
  • Robust daisy chain communications system
  • Integrated system diagnostics for all key internal functions
  • Hardwired and communications based fault notification
  • Integrated watchdog shuts down device if communication is lost
  • 7µA shutdown current: Enable = VSS
  • 2Mbps SPI

Documentation

Design & Development

Sample Code
Type
Title
Date
Sample Code
ISL94212 Sample Code
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Support Communities

  1. ISL94212

    I want ISL94212 Arduino sample code and i am facing issue on hardware side ic not generating input voltage like v2p5 , vref , Exvdd .

    May 13, 2023
  2. ISL94212 Communication Issue

    Hi All,  I am trying to interface an Arduino with ISL94212 in daisy chain (3 devices). However, I am facing an error that whenever I read any value such as voltage I always get 0s in the data field. I also tried setting the overvoltage limit register but its data ...

    Oct 12, 2020
  3. ISL94212 BMS

    #DATA READY TIMEOUT  AND EEPROM COMM ERROR I am working on ISL94212 BMS and I am using the daisy chain communication because I connected two ISL94212 devices. as for the document I have done the setting. when I am connecting my battery red led glows on ISL94212. I am ...

    Aug 17, 2022
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