The ISL94212INZ 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 ISL94212INZ communicates to a host microcontroller via an SPI interface and to other ISL94212INZ devices using a robust, proprietary, two-wire Daisy Chain system. The ISL94212INZ is offered in a 64 Ld TQFP package and is specified for an operational temperature range of -40°C to +85°C.
Feature
- 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
