Features
- Fully integrated battery management with capacity measurement and programmable protection
- Supports 3 to 7 series Li-ion or Li-Polymer cells
- Operation voltage range: 4.0V to 50V
- Low Power Sleep Mode with Hardware Protection: (25uA typ.)
- Memory: 128kB Code Flash, 4kB Data Flash, and 7kB SRAM
- 19 GPIO ports
- Communication: I2C, UART, and CSI
- High-precision A/D converters, 15-bit ADC for Voltage/Temperature, 18-bit coulomb counter
- Protection: Short circuit, Charge/Discharge over current, Over/Under voltage
- Regulator: 3.3V or 5.0V selectable
- High-side N-channel MOSFET drive for charge/discharge control
- Cell balancing
- Compact 48-pin QFN package, 6.0mm x 6.0mm
RAJ240091GNP Functional Diagram
Description
The RAJ240091 is a Renesas Li-ion battery fuel gauge IC (FGIC), which consists of an MCU device and an AFE device in a single package. It features the RL78 CPU core with multiple low-power modes, enabling high performance during ultra-low power operation.
This fuel gauge IC includes control firmware stored in embedded flash memory, which manages the operation of its analog and digital circuits. Its core functions include measuring battery voltage, current, and temperature, estimating remaining capacity, and providing protection against overcurrent, overvoltage, and excessive temperature, as well as executing other battery management operations.
Parameters
| Attributes | Value |
|---|---|
| Series Cells | 3 to 7 Cells |
| Supply Voltage (V) | 4 - 50 |
| Comm. Interface | I2C, UART |
| Flash Memory (KB) | 128 |
| Charge/Discharge FET Control | High / Low Side |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) |
|---|---|---|
| QFN | 6 x 6 x 1.0 | 48 |
Application Block Diagrams
 | Humanoid Battery Management System Integrated humanoid robot BMS enabling safe, real-time power management, protection, and battery-state control. |
Additional Applications
- E-Bike
- E-Scooter
- Pedal-Assist Bicycle
- Power Tool
- Vacuum Cleaner
- Drone
- Battery Backup System
- Energy Storage System (ESS)
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| Part Number | Status | Samples | Stock | Package | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Pkg. Dimensions (mm) | Target applications | Pb (Lead) Free |
|---|---|---|---|---|---|---|---|---|---|---|
| RAJ240091A20GNP#HA3 | Active | N/A | Out of Stock | QFN | 48# | Tape & Reel | 3 | 6 x 6 x 1.0 | Industrial/Hi-power equipment, Battery Management Unit | Yes |
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