The ISL94208 battery front end IC is designed for use with a microcontroller and features an analog front-end with overcurrent protection for multi-cell Li-ion battery packs. The ISL94208 supports battery packs consisting of four to six cells in series and one or more cells in parallel. Using an internal analog multiplexer, the ISL94208 allows a separate microcontroller with an A/D converter to monitor each cell voltage plus internal and external temperature. The ISL94208 provides integral overcurrent and short-circuit protection circuitry, an internal 3. 3V voltage regulator, internal cell balancing switches, and drive circuitry for external FET devices for control of pack charge and discharge.


  • Software selectable overcurrent protection levels and variable protect detection times
  • 4 discharge overcurrent thresholds
  • 4 short-circuit thresholds
  • 4 charge overcurrent thresholds
  • 8 overcurrent delay times (charge)
  • 8 overcurrent delay times (discharge)
  • 2 short-circuit delay times (discharge)
  • Automatic FET turn-off and cell balance disable on reaching external (battery) or internal (IC) temperature limit
  • Automatic cell balance turn off on IC over-temperature
  • Integrated charge/discharge FET drive circuitry
  • Internal cell balancing FETs handle up to 200mA of balancing current for each cell
  • Sleep operation with negative or positive edge wake-up
  • <10μA Sleep mode


  • Power tools
  • Portable equipment
  • Battery backup systems
  • Military electronics

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active QFN Tube 60
Active QFN Reel 6000
Active QFN Reel 250


Title language Type Format File Size Date
Datasheets & Errata
ISL94208 Datasheet Datasheet PDF 1.61 MB
User Guides & Manuals
ISL94208EVZ GUI User Guide Manual PDF 2.21 MB
ISL94208EVZ User Guide Manual PDF 2.07 MB
ISL94208EVZ User Guide Manual PDF 1.14 MB
Application Notes & White Papers
AN1891: Designing with the ISL94208 Analog Front End Application Note PDF 1.80 MB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 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
PCN14036 - Wafer fabrication Site Change for Listed Intersil Products - Palm Bay, Florida Product Change Notice PDF 294 KB
Analog ICs Brochure 日本語 Brochure PDF 4.20 MB
Industrial Power Management Brochure ( R16CL0001EJ0200 ) 日本語 Brochure PDF 3.13 MB
ISL94208 Evaluation Kit Software Library ZIP 4.87 MB
PIN19006 - Price Increase for the Listed Renesas Electronics America Products Price Increase Notice PDF 257 KB


Title language Type Format File Size Date
ISL94208 Evaluation Kit Software Library ZIP 4.87 MB

Boards & Kits

Part Number Title Type Company
ISL94208EVZ 4- to 6-Cell Li-ion Battery Management Analog Front-End Evaluation Board Evaluation Renesas