Multi-Cell Li-Ion Battery Manager ISL94212 Features The ISL94212 is a Multi-cell Li-ion battery manager IC that supervises up to 12 series connected cells. The part performs accurate monitoring, cell balancing and extensive system diagnostics functions. Three cell balancing modes are provided: manual mode, timed mode and an auto-balance mode which terminates balancing functions when a (host microcontroller specified) charge transfer value has been met. • Up to 12-cell voltage monitors, support Li-Ion CoO2, Li-Ion Mn2O4, and Li-Ion FePO4 chemistries The ISL94212 communicates to a host microcontroller via an SPI interface and to other ISL94212s using a robust, proprietary, two-wire Daisy Chain system. • Robust Daisy Chain communications system The ISL94212 is offered in a 64 Ld TQFP package and is specified over an industrial temperature range of -40°C to +85°C. Applications • Cell voltage measurement accuracy ±10mV • Cell voltage scan rate of 19.5µs per cell (234µs to scan 12 cells) • Up to four external temperature inputs • 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 • Hybrid, electric vehicle battery packs • Battery backup systems Related Literature • E-Moto; E-Bike • Evaluation board application note: ISL94212EVZ TO OTHER DEVICES (OPTIONAL) ISL94212 ISL94212 DHi2 DLo2 DHi2 DHi1 DLo2 DLo1 SCLK DOUT DIN CS DATA READY HOST MICRO FAULT EN MONITOR BOARD (Master or Stand-alone) MONITOR BOARD (Daisy Chain - Optional) FIGURE 1. TYPICAL APPLICATION December 14, 2012 FN7938.0 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 2012. All Rights Reserved Intersil is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. ISL94212 For additional products, see www.intersil.com/product_tree Intersil products are manufactured, assembled and tested utilizing ISO9000 quality systems as noted in the quality certifications found at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 2 FN7938.0 December 14, 2012