ISL94202

Series Charge/Discharge Path 3-to-8 Cell Li-ion Battery Pack Monitor

Product Status: Mass Production

OVERVIEW

The ISL94202 is a Li-ion battery monitor IC that supports from three to eight series connected cells and provides complete battery protection, monitoring, and pack control. The ISL94202 provides automatic shutdown and recovery from out-of-bounds conditions and automatically controls pack cell balancing.

The ISL94202 is highly configurable as a stand-alone unit, but can also be used as a battery front end with an external microcontroller via an I2C 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
ISL94202
Basic Information
Production Status
Mass Production
# 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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