Short-Form Datasheet ISL78714 Automotive Grade Multi-Cell Li-Ion Battery Manager The ISL78714 automotive grade Li-ion battery Features manager IC supervises up to 14 series connected Monitors and manages up to 14 cells all standard cells and is optimized to meet stringent automotive Li-Ion cell chemistries performance, reliability, and safety requirements. The AEC-Q100 qualified, supports ASIL D systems device provides all the functions expected of such a Robust two-wire Daisy Chain communications critical component in a battery management system, system using capacitor or transformer coupling at such as accurate cell voltage and temperature up to 1Mbps monitoring, cell balancing, and extensive system diagnostics. High security communications protocol per ISO26262 In a typical configuration, a Master ISL78714 Cell voltage measurement accuracy communicates to a host microcontroller through an 1.65V to 4.28V -20C to +85C: SPI port and up to 29 additional ISL78714 devices connected together by a robust, proprietary, two-wire Initial Device accuracy: 2mV Daisy Chain. This communication system is highly Post board assembly Device accuracy: 2.5mV flexible and can be implemented with capacitor Cell input range: 5.0V, negative voltages ideal for isolation, transformer isolation, or a combination of bus bars both. Up to six external temperature monitoring inputs Three cell balancing modes are included: Manual Internal temperature monitoring with warning flag Balance mode, Timed Balance mode, and Auto Two general purpose I/O pins Balance mode. Auto Balance mode terminates balancing after a host-specified amount of charge has Automatic sensing of position in battery stack been removed from every cell. Measures and performs read-back on all voltages, temperatures, and diagnostics for 112 cells in less The ISL78714 is packaged in a 64 pin TQFP and is than 10ms specified for operation from -40C to +105C. User-selectable cell measurement averaging Applications function Hybrid Electric Vehicle (HEV), Plug-in Hybrid 14-bit voltage and temperature measurements Electric Vehicle (PHEV), and Electric Vehicle (EV) Integrated system diagnostics for all key functions battery packs Watchdog shuts down device if communication is Electric motorcycle battery packs lost Backup battery and energy storage systems Pb-free (RoHS compliant) requiring high accuracy management and Long term drift: -0.31 log(khrs) monitoring Fully tolerant to EMC and transients Portable and semi-portable equipment R33DO0008EU0105 Rev.1.05 Page 1 Oct 28, 2021 2021 Renesas ElectronicsISL78714 Short-Form Datasheet To Other Devices (Optional) Monitor Board Monitor Board Up to 30 total (Daisy Chain - Optional) (Master or Stand-Alone) ISL78714 ISL78714 VBAT VBAT VG2 VG1 PACK PACK VC14 VC14 DHi2 VC13 VC13 DLo2 VC12 VC12 VC11 VC11 DHi2 DHi1 VC10 VC10 VC9 DLo2 DLo1 VC9 VC8 VC8 VC7 VC7 VC6 VC6 VC5 VC5 Host VC4 VC4 Micro VC3 VC3 VC2 VC2 VC1 VC1 VC0 VC0 VSS VSS VG1 VG2 VG1 Figure 1. Typical Application R33DO0008EU0105 Rev.1.05 Page 2 Oct 28, 2021 14 Cells SPI 14 Cells