Overview
Description
Renesas’ daisy chainable 14-cell battery front-end is ideal for high voltage, stacked battery systems. The RAA489204 is a 14-cell battery front-end (BFE) IC, an essential component of any battery management system (BMS), which periodically scans battery status and the operating environment to optimize battery life and prevent catastrophic failures. The part provides accurate monitoring, cell balancing, and extensive system diagnostics functions. Cell balancing can be conducted either internally or externally, with 10V gate pins for external balancing.
The RAA489204 Li-ion battery manager IC supervises up to 14 series connected cells. The part provides accurate monitoring, cell balancing, and extensive system diagnostics functions. Three cell balancing modes are provided: Manual Balancing mode, Timed Balancing mode, and Auto Balance mode. The Auto Balance mode terminates balancing functions when a charge transfer value has been met. The RAA489204 communicates to a host microcontroller via an SPI interface and to other RAA489204 devices using a robust, proprietary, two-wire daisy chain system. The RAA489204 is offered in a 64 Ld TQFP package and is specified for an operational temperature range of -40 °C to +85 °C.
Features
- Robust daisy-chain communications system
- Daisy-chain supports both capacitive and transformer connected communications
- Up to 14-cell voltage monitors, support Li-ion CoO2, Li-ion Mn2O4, and Li-ion FePO4 chemistries
- Cell voltage measurement accuracy ±10mV
- 14-bit voltage and temperature measurements
- Internal temperature monitoring
- Up to six external temperature inputs
- Integrated system diagnostics for all key internal functions
- Hardwired and communications based fault notification
- Integrated watchdog shuts down the device if communication is lost
- 10µA shutdown current: Enable = VSS
- 2.5Mbps SPI
Comparison
Applications
Design & Development
Sample Code
Boards & Kits
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Support
Support Communities
Get quick technical support online from Renesas Engineering Community technical staff.
Support Communities
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RAA489204 in 32 cell configuration
Hello, we like to use multiple RAA489204 to use it with 32 cells in series. Are there any design examples how to configure the Powersupply and the balncing fets? From the datasheet the recommended balancing fets for one RAA489204 are 30V or 60V. When I use more cells do I ...
Mar 1, 2023 -
RAA489204 in 32 cell configuration Gpios
Hello, we like to use the RAA489204 in a 32 to 40 cell configuration. Therfor we use 3 RAA489204 in series. Every RAA489204 has GPIOs. I understood, that every RAA489204 has its own #FAULT Pin (GPIO 1) that I have to use to have the possibilty to use it ...
Aug 15, 2023 -
Design Files
Hello. I see that the RAA489204 IC is a development board. Can you share the schematic and design files of this board? Only production files are available in the files on the site. Please contact me, I will be glad. Have a nice day. https://www.renesas.com ...
Oct 7, 2022
FAQs
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External temperature monitoring input pins in RAA489204
Last Updated: 11/04/2024 Question: How many input pins we can use in RAA489204 for external temperature monitoring? Answer: We can use up to six input pins for external temperature monitoring in RAA489204. Pin no.35, 36, 37, 38 (ExT1, ExT2, ExT3, ExT4) & GPIO pin no ...
Nov 4, 2024
Videos & Training
An overview of how the Renesas multi-cell battery front devices streamline development for high-cell count, high-voltage systems with flexible cell balancing and lower system costs. Visit renesas.com/bfe for more details.