Renesas’ wholly integrated 16-cell battery front end is ideal for challenging industrial environments. The RAA489206 is a 16-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. A differential multiplexer and 16-bit ADC allows for accurate monitoring of cell voltage, temperature, and load current for management of the overall state of the battery pack.

The RAA489206 supports I2C and SPI protocols allowing customers to connect a microcontroller (MCU) in a proprietary battery management solution. Low current consumption with an average IDLE mode current of 200µA and a SHIP mode current of less than 18µA maximizes the storage and discharge life of a battery pack.

The RAA489206 features internal cell balancing circuitry that provides 8mA of balance current per cell. External cell balancing for higher currents is also supported. This 16-cell high voltage BFE IC is offered in an efficient 64-lead QFN package with a thermal pad.


  • Wholly integrated 16S front-end for sophisticated high voltage batteries
  • Rugged monolithic device tested to withstand hot plug events and with higher ESD ratings
  • Both internal and external cell balancing supported via internal FETs and dedicated FET driver pins
  • EVK and GUI for easy out of the box evaluation and development
  • Total BOM cost and component count reduced >$1 savings and >20% board space
  • High accuracy ADC for VCELL and IPACK
  • Supports I2C, and SPI communications
  • Integration shortens development time by elimination of component selection, integration, and testing
  • Charging time reduced and up-time maximized by seamless control of external cell balancing FETs
  • High hot plug rating: 62V
  • Charge/load wakeup detection circuitry
  • 4-pin GPIO port
  • Integrated 3.3V regulator
  • 16-bit VCELL and IPACK measurements




  • Light electric vehicles such as e-bikes, e-motorcycles, wheelchairs, and mobility scooters
  • Home appliances
  • 24V, 36V, 42V, and 48V portable battery packs
  • Energy storage and 48V UPS systems              
  • Telecom and server farms
  • Solar farms
  • High-voltage industrial power tools
  • Cordless power tools
  • Farm and gardening tools


Design & Development

Sample Code

Boards & Kits

Boards & Kits


RAA48920x Multi-Cell Battery Front End Family

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.