Features
- Fully integrated battery management solution with battery capacity measurement and programmable protection capability.
- Supports up to 10 Li-ion or Li-Polymer battery cells in series. RAJ240090 supports 3 to 8 series cells, RAJ240100 supports 3 to 10 series cells.
- Integrated with Renesas Ultra Low Power RL78 CPU core for multi-function process
- Memory
- Code flash memory: 128KB
- Data flash memory (up to 100,000 erase/write cycles): 4 KB
- SRAM: 7KB
- Clock generator
- High-speed on-chip oscillator: up to 32 MHz
- Low-speed on-chip oscillator:32 KHz
- AFE High-speed on-chip oscillator: 4.194MHz
- AFE low-speed on-chip oscillator: 131.072 KHz
- General Purpose I/O Ports
- Total: 31 pins
- CMOS input/output: 20
- CMOS input: 4
- N-ch open drain input/output [6V tolerance]: 4
- High voltage input/output [VCC tolerance]: 3
- Serial interface
- CSI (SPI): 2 channels
- I2C: 1 channel
- UART: 2 channels
- Simplified I2C: 2 channels
- CAN interface (RS-CAN lite): 1 channel
- Timer
- MCU 16-bit timer: 6 channels
- MCU 12-bit interval timer: 1 channel
- MCU Real-time clock: 1 channel
- AFE timer: 2 channels
- AFE timer A: setting range: 125 ms to 64 s
- AFE timer B: setting range: 30.52 us to 125 ms
- Embedded A/D converter
- AFE 15-bit resolution sigma-delta A/D converter
- MCU 8/10-bit resolution A/D converter
- Battery cell voltage and temperature (AN port voltage) detection circuit
- Monitoring over/under voltage and temperature by Sigma-delta AD converter (AFE) without controlling from MCU
- Current integration circuit
- 18-bit resolution sigma-delta A/D converter
- Impedance measurement circuit
- Simultaneous measurement of battery voltage and current
- Over current detection circuit
- Short circuit current detection
- Charge overcurrent detection
- Discharge overcurrent detection
- Charge wakeup current detection
- Discharge wakeup current detection
- Series regulator
- 3.3V or 5.0V CREG2
- Over 100mA output current by external Nch MOSFET
- Charge and Discharge MOSFET control
- High-side Nch MOSFET drive circuit embedded
- Programmable MOSFET control by 8-bit PWM
- Support RTC function
- To connect external crystal resonator (32.768kHz) and generate internal clock.
- Voltage and temperature condition
- Power supply voltage: VCC = 4.0 to 50V
- Operating ambient temperature : TA= -40 to +85°C
- Package Information
- 64-pin plastic mold LQFP ([Body] 10.0mm x 10.0mm,0.5 mm pitch)
Description
RAJ240090/RAJ240100 are Renesas Li-ion battery fuel gauge ICs (FGICs) that consist of an MCU device and an AFE device in a single package. They are packed with a variety of battery management features and the Renesas RL78 CPU core, which has multiple low-power modes and is capable of achieving high performance in ultra-low power operation. RAJ240090/ RAJ240100 fuel gauge ICs have control firmware stored in embedded flash memory to control attached embedded analog and digital circuits to perform battery voltage / current / temperature measurement, remaining capacity estimation, over current / voltage / temperature protection, and other battery management operations.
Parameters
| Attributes | Value |
|---|---|
| Series Cells | 3 to 10 Cells |
| Supply Voltage (V) | 4 - 50 |
| Comm. Interface | I2C, UART, CAN |
| Flash Memory (KB) | 128 |
| Charge/Discharge FET Control | High / Low Side |
Application Block Diagrams
 | Portable Power System Portable power system with 240W USB-C, 3.6KW bidirectional charging, and digital control. |
 | USB PD Charger Battery Management High-efficiency USB PD charger battery management system supports up to 240W, multi-cell packs, and fuel gauging. |
 | E-Bike System A complete e-bike system with advanced MCUs, power, and BMS devices extends travel and enhances control. |
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RAJ240090/100 Fixed-Firmware Evaluation Kit for Battery Management
The RAJ240090/100 evaluation kit consists of an evaluation module (EVM), a USB System Management Bus (SMBus), and an interface adapter. It allows users to evaluate their battery management system using the Renesas RAJ240090 Li-ion Battery Fuel Gauge IC (FGIC) and/or RAJ240100GFP Li-ion Battery... Read More
