Renesas RAA489204

Description

The 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 micro-controller through an SPI port and up to 29 additional RAA489204 devices connected together 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 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 standardLi-Ion cell chemistries
• Robust two-wire Daisy Chain communications system using 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 warning flag
• Two general purpose I/O pins
• Automatic sensing of position in battery stack
• Measures and performs read-back on all voltages,temperatures, and diagnostics for 112 cells in lessthan 10ms
• User-selectable cell measurement averagingfunction
• 14-bit voltage and temperature measurements
• Integrated system diagnostics for all key functions
• Watchdog shuts down device if communication islost
• Fully tolerant to EMC and transients

Typical applications

• Energy Storage systems, 20-28 Cell Battery Pack (Up to 118V)
• E-Mobility and E-Bikes
• UPS, Battery-based generators

More information

• Datasheet
• IC product information