Renesas Electronics RAA489204 Li-ion Battery Manager IC

Renesas Electronics RAA489204 Industrial Grade Li-ion Battery Manager IC supervises up to 14 series-connected cells and is optimized to meet stringent Industrial performance, reliability, and safety requirements. The device provides all the functions expected of such a critical component in a battery management system, such as accurate cell voltage and temperature monitoring, cell balancing, and extensive system diagnostics.

In a typical configuration, a Master RAA489204 communicates to a host microcontroller through an SPI port and up to 29 additional RAA489204 devices connected by a robust, proprietary, two-wire Daisy Chain. This communication system is highly 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 Renesas Electronics RAA489204 is packaged in a 64 pin TQFP and is specified for operation from -40ºC to +85ºC.

Features

Monitors and manages up to 14 cells; all standard Li-Ion cell chemistries
Robust two-wire Daisy Chain communications system using a capacitor or transformer coupling at up to 1Mbps
High-security communications protocol
Cell voltage measurement accuracy +/-10mV
Up to six external temperature monitoring inputs
Internal temperature monitoring with a warning flag
Two general-purpose I/O pins

Automatic sensing of position in a battery stack
Measures and performs read-back on all voltages, temperatures, and diagnostics for 112 cells in less than 10ms
User-selectable cell measurement averaging function
14-bit voltage and temperature measurements
Integrated system diagnostics for all key functions
Watchdog shuts down device if communication is lost
Fully tolerant to EMC and transients

Applications

Electric mobility battery packs
Portable and semi-portable equipment

Backup battery and energy storage systems requiring high accuracy management and monitoring

Renesas Electronics RAA489204 Li-ion Battery Manager IC

Features

Applications

Block Diagram

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