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.


  • 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


  • Hybrid, electric vehicle battery packs
  • Battery backup systems
  • E-Moto; E-Bike


Title language Type Format File Size Date
star ISL94212 Datasheet Datasheet PDF 4.46 MB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
Analog ICs Brochure 日本語 Brochure PDF 2.72 MB
ISL94212 Software Manual Manual - Software PDF 1.98 MB
- ISL94212 Sample Code Sample Code ZIP 474 KB
PCN15007 - This notice is to advise our customers of a minor silicon design revision Product Change Notice PDF 233 KB
PCN14006 - Test Site Change for the Listed Intersil Products Product Change Notice PDF 168 KB
Low-Side FET White Paper 简体中文 White Paper PDF 263 KB
Putting Safety into Li-ion Battery Packs 简体中文 White Paper PDF 451 KB
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
Battery Management System Tutorial 简体中文 White Paper PDF 451 KB


Title language Type Format File Size Date
ISL94212 Sample Code Sample Code ZIP 474 KB
- ISL94212 Software Manual Manual - Software PDF 1.98 MB

memoryBoards & Kits

Part Number Title Type Company
ISL94212EVKIT1Z Multi-Cell Li-Ion Battery Manager Evaluation Kit Evaluation Renesas