ISL78600

Multi-Cell Li-Ion Battery Manager

Product Status: Mass Production

OVERVIEW

The ISL78600 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 incorporated: Manual Balance mode, Timed Balance mode, and Auto Balance mode. The Auto Balance mode terminates balancing functions when a charge transfer value specified by the host microcontroller has been met.

The ISL78600 communicates to a host microcontroller through an SPI interface and to other ISL78600 devices using a robust, proprietary, two-wire daisy chain system.

The ISL78600 is offered in a 64 Ld TQFP package and is specified for operation at a temperature range of -40°C to +105°C.

KEY FEATURES

  • Up to 12-cell voltage monitors with support for Li-ion CoO2, Li-ion Mn2O4, and Li-ion FePO4 chemistries
  • Board level cell voltage measurement accuracy ±1.5mV
  • 13-bit cell voltage measurement
  • Pack voltage measurement accuracy ±100mV
  • 14-bit pack voltage and temperature measurements
  • Cell voltage scan rate of 19.5μs per cell (234μs to scan 12 cells)
  • Internal and external 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
  • 2Mbps SPI AEC-Q100 qualified

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL78600
Basic Information
Production Status
Mass Production
# Series Cells
6 to 12 Cells
Communication Interface
SPI and Proprietary Asynchronous
Implementation
Pack
Cell Balancing
External (Built-in FET Drivers)
Pack Voltage
up to 63V per Device
Absolute Cell Voltage Measurement Accuracy
2.0mV Max (-20°C to 60°C)
Integrated Charge/Discharge FET Drive
No
Integrated Current Sense/Detection
No
Integrated Temperature Sense
Yes
IS (max)
5 mA
SHDN ICC
(typ) 15 µA
Integrated Regulator Output/Reference Output
3.3V / 2.5V
Special Features
*Daisy Chain up to 14 devices (168 Cells)
*Robust Hot Plug Performance
*Provides Diagnostic Information
*Fast Scan Rate of 20µs/cell
Package
64Ld TQFP (10x10mm)
Qualification Level
Automotive
Temperature Range
-40 to +105

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