DATASHEET
ISL94212 FN7938
Rev 1.00
April 23, 2015 Multi-Cell Li-Ion Battery Manager
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 -40В°C to
+85В°C. Applications Features Up to 12-cell voltage monitors, support Li-Ion CoO2, Li-ion
Mn2O4, and Li-ion FePO4 chemistries Cell voltage measurement accuracy В±10mV 13-bit cell voltage measurement Pack voltage measurement accuracy В±180mV 14-bit pack voltage and temperature measurements Cell voltage scan rate of 19.5Вµs per cell (234Вµs to scan
12 cells) Internal temperature monitoring Up to four external temperature inputs Robust daisy chain communications system Light electric vehicle (LEV); E-Moto; E-Bike Integrated system diagnostics for all key internal functions Battery backup systems; Energy Storage Systems (ESS) Hardwired and communications based fault notification Solar Farms Integrated watchdog shuts down device if communication is
lost Portable and semi-portable equipment 7ВµA shutdown current: Enable = VSS 2Mbps SPI TO OTHER DEVICES (OPTIONAL) ISL94212 ISL94212 VG2 VG2 VG1 VG1
DHi2
DLo2
DHi2 DHi1 DLo2 DLo1 SCLK …