Features
- Fully integrated battery management with battery capacity measurement and programmable protection
- Supports 3 to 7 series Li-ion or Li-Polymer cells
- Operation voltage range: 4.0V to 40V
- Low Power Sleep Mode with Hardware Protection: (25uA typ.)
- Memory: 64kB Code Flash, 4kB Data Flash, and 5.5kB SRAM
- 21 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 output
- Low-side N-channel MOSFET drive for charge/discharge control
- Cell balancing
- 48-pin QFP package, 7.0mm x 7.0mm
Description
The RAJ240301 is Renesas' Li-ion battery fuel gauge IC (FGIC), integrating an MCU and an AFE into a single package. It offers advanced battery management capabilities, powered by a Renesas RL78 CPU core with multiple low-power modes that deliver high performance during ultra-low power operation.
Equipped with embedded flash memory on the MCU, similar to other RL78 family devices, it stores program instructions and data to execute critical battery management tasks. These include measuring battery voltage, current, and temperature, estimating remaining capacity, and providing over-current, over-voltage, and over-temperature protection. The RAJ240301 ensures reliable and efficient battery operation, making it a robust solution for modern power management needs.
Parameters
| Attributes | Value |
|---|---|
| Series Cells | 3 to 7 Cells |
| Supply Voltage (V) | 4 - 40 |
| Comm. Interface | I2C, UART |
| Flash Memory (KB) | 64 |
| Charge/Discharge FET Control | Low Side |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) |
|---|---|---|
| LFQFP | 7 x 7 x 1.6 | 48 |
Product Comparison
| RAJ240301GFP | RAJ240080DFP | RAJ240090GFP | RAJ240091GNP | |
| Series Cells | 3 to 7 Cells | 2 to 5 Cells | 3 to 8 Cells | 3 to 7 Cells |
| Supply Voltage | 4.0 - 40 | 4.0 - 28 | 4.0 - 50 | 4.0 - 50 |
| Comm. Interface | I2C, UART | I2C, UART | CAN, I2C, UART | I2C, UART |
| Flash Memory (KB) | 64 | 64 | 128 | 128 |
| Charge/Discharge FET Control | Low Side | High Side | High / Low Side | High / Low Side |
| Pkg. Type | LFQFP | LFQFP | LFQFP, LQFP | QFN |
| Pkg. Dimensions (mm) | 7 x 7 x 1.6 | 7 x 7 x 1.7 | 10 x 10 x 1.6, 10 x 10 x 1.7 | 6 x 6 x 1.0 |
Application Block Diagrams
 | Humanoid Battery Management System Integrated humanoid robot BMS enabling safe, real-time power management, protection, and battery-state control. |
Additional Applications
- Vacuum Cleaner
- Power Tool
- Drone
- E-Bike
- Pedal-Assist Bicycle
- Battery Backup System
- Energy Storage System (ESS)