Li-ion battery manager IC meets stringent industrial performance and reliability

Renesas Electronics RAA489204 Industrial Grade Li-ion Battery Manager IC, available now from Mouser, supervises up to 14 series-connected cells and is optimised to satisfy stringent industrial performance, reliability, and safety demands. The device offers all the functions expected of such a critical component in a battery management system, including accurate cell voltage and temperature monitoring, cell balancing, and extensive system diagnostics.

In a typical configuration, a Master RAA489204 communicates to a host microcontroller via an SPI port and up to 29 further RAA489204 devices connected by a robust, proprietary, two-wire Daisy Chain. This communication system is extremely flexible and can be implemented with capacitor isolation, transformer isolation, or a combination of both.

Three cell balancing modes are included (Manual Balance mode, Timed Balance mode, and Auto Balance mode). Auto Balance mode terminates balancing after a host-specified amount of charge has been removed from every cell. The device is packaged in a 64-pin TQFP and is specified for operation from -40C to +85C.

Typical areas of application include electric mobility battery packs, portable and semi-portable equipment, and backup battery and energy storage systems needing high accuracy management and monitoring.