ISL94203

3-to-8 Cell Li-ion Battery Pack Monitor

Product Status: Mass Production (Not recommended for new designs)

OVERVIEW

The ISL94203 is a Li-ion battery monitor IC that supports from 3 to 8 series connected cells. It provides full battery monitoring and pack control. The ISL94203 provides automatic shutdown and recovery from out of bounds conditions and automatically controls pack cell balancing.

The ISL94203 is highly configurable as a stand-alone unit, but can be used with an external microcontroller, which communicates to the IC through an I2 C interface.

KEY FEATURES

  • Eight cell voltage monitors support Li-ion CoO2, Li-ion Mn2O4 and Li-ion FePO4 chemistries
  • Stand-alone pack control - no microcontroller needed
  • Multiple voltage protection options (each programmable to 4.8V; 12-bit digital value) and selectable overcurrent protection levels
  • Programmable detection/recovery times for overvoltage, undervoltage, overcurrent and short-circuit conditions
  • Configuration/calibration registers maintained in EEPROM
  • Open battery connect detection
  • Integrated charge/discharge FET drive circuitry with built-in charge pump supports high-side N-channel FETs
  • Cell balancing uses external FETs with internal state machine or external microcontroller
  • Enters low power states after periods of inactivity. Charge or discharge current detection resumes normal scan rates

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL94203
Basic Information
Production Status
Mass Production (Not recommended for new designs)
# Series Cells
3 to 8 Cells
Communication Interface
I2C
Implementation
Pack
Cell Balancing
External (Built-in FET Drivers)
Pack Voltage
4V to 36V
Absolute Cell Voltage Measurement Accuracy
15mV Max (0°C to 60°C)
Integrated Charge/Discharge FET Drive
Yes
Integrated Current Sense/Detection
Yes (High Side Measurement)
Integrated Temperature Sense
Yes
IS (max)
370 µA
SHDN ICC
(max) 1 µA
Integrated Regulator Output/Reference Output
2.5V / 1.8V
Special Features
*Stand Alone operation or with External µC
*Provides Diagnostic Info
*Robust Hot Plug Performance
*Fast Scan Rate of 100µs/Cell
Package
48Ld TQFN (6x6mm)
Qualification Level
Standard
Can Sample
YES
Temperature Range
-40 to +85

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