Overview
Description
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
Comparison
Applications
Design & Development
Sample Code
Boards & Kits
Evaluation
ISL94212EVKIT1Z
Active
Multi-Cell Li-Ion Battery Manager Evaluation Kit
The ISL94212EVKIT1Z is an evaluation kit that facilitates the use of the ISL94212 Li-ion battery manager IC. The ISL94212 monitors cell voltage and temperature. It converts the cell voltages and temperatures to 14-bit digital values, provides cell balance control, and it provides significant...
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Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
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