Renesas offers a dedicated single-package solution with an MCU and analog front end (AFE) for battery management systems that constantly monitors the battery state.

Safety Features

  • Built-in self-diagnostic functions for microcontroller and analog front-end (AFE)
  • Low power mode for safe storage
  • Protection functions (Over/Under voltage, Over charge/discharge current, Short current, Over/Under temperature)

High Accuracy

  • High-precision delta-sigma A/D converter specialized for current, voltage, and temperature detection
  • Battery level calculation takes battery deterioration into account
Battery Management Controllers Block Diagram

Power & Power Management

Product Selection Table

    Processing table
    Part Number
    Series Cells (#)
    Supply Voltage (V)
    Comm. Interface
    Flash Memory (KB)
    Charge/Discharge FET Control
    Pkg. Type
    RAJ240045DNP
    2 to 4 Series Li-ion Battery Fuel Gauge IC    		 2 to 4 Cells 4 - 25 I2C (SMBus), UART 64 High Side QFN32
    RAJ240047DNP
    2 to 4 Series Li-ion Battery Fuel Gauge IC    		 2 to 4 Cells 4 - 25 I2C (SMBus), UART 128 High Side QFN32
    RAJ240071DNP
    2 to 5 Series Li-ion Battery Fuel Gauge IC    		 2 to 5 Cells 4 - 25 I2C (SMBus), UART 32 High Side QFN32
    RAJ240075DNP
    2 to 5 Series Li-ion Battery Fuel Gauge IC    		 2 to 5 Cells 4 - 25 I2C (SMBus), UART 64 High Side QFN32
    RAJ240090GFP
    3 to 8 Series Li-ion Battery Fuel Gauge IC    		 3 to 8 Cells 4 - 50 CAN, I2C (SMBus), UART 128 High / Low Side LQFP64
    RAJ240100GFP
    3 to 10 Series Li-ion Battery Fuel Gauge IC    		 3 to 10 Cells 4 - 50 CAN, I2C (SMBus), UART 128 High / Low Side LQFP64
    RAJ240310GNP
    3 to 10 Series Li-ion Battery Fuel Gauge IC    		 10 8 - 50 I2C (SMBus), UART 64 Low Side QFN40
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    Documentation

    Title Type Date
    Battery Management Solutions Brochure
    PDF1.11 MB
    Brochure
    Battery Fuel Gauge IC Functional Safety
    PDF198 KB
    Flyer
    Lithium-Ion Battery Management Solution

    Learn about how Renesas' Li-ion battery management solution solves the issues of cell-balancing and safety.

    Video List
    Lithium-Ion Battery Management Solution