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.

Features

• 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

Applications

• Light electric vehicle (LEV); E-Moto; E-Bike

• Battery backup systems; Energy Storage Systems (ESS)

• Solar Farms

• Portable and semi-portable equipment