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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. Value of V3P3 ISL94212 is too high , how to check the issue?

    Looking at the ISL94212 , the reference voltage of 3.3V is biased high to 3.58V (V3P3  pin), causing the battery sampling voltage to be too low. What could be the reason for this, and how can this fault be eliminated?

    Oct 8, 2024
  3. ISL94212 CUIRCUIT UNDERSTANDING

    Hello members, I have one doubt regarding their balancing circuits. In that when 12 battery required then 3 P-MOS and 9 N-MOS is used for sinking and sourcing application. I just need to understand why sinking and sourcing application required And also want to understand if I want ...

    Apr 1, 2021
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