RAJ240090/RAJ240100 are Renesas Li-ion battery fuel gaugeIC(FGIC)which consistof a MCU device and an AFE device in a single package. Pack with a variety of battery managementfeatures and Renesas RL78 CPU core which has multiple low power modes andcapable of achievinghigh performance in ultra-low power operation. RAJ240090/ RAJ240100 fuel gaugeIC havecontrol firmware stored in embedded flashmemory to controlattached embedded analog and digital circuits to execute battery voltage / current / temperature measurement, remaining capacity estimation, over current / voltage / temperature protection and other battery management operations.


  • Fully integrated battery management solution with battery capacity measurement and programmableprotection 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-functionprocess
  • Memory Code flash memory: 128KB Data flashmemory (up to 100,000 erase/write cycles): 4 KB SRAM: 7KB
  • Clock generator High-Speed on-chip oscillator: upto 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 drainInput/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: 6channels 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 drivecircuit 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 Operatingambient temperature RAJ240090 supports TA= -20 to +85°C RAJ240100 supports TA=-40 to +85°C
  • Package Information 64 pin plastic mold LQFP ([Body] 10.0mm x 10.0mm,0.5 mm pitch)

Product Options

Orderable Part ID Part Status Type Carrier Type Buy Sample

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
RAJ240090 / RAJ240100 Datasheet Datasheet PDF 3.27 MB
RAJ240090 / RAJ240100 Data Sheet Datasheet PDF 2.99 MB
Application Notes & White Papers
Renesas Flash Programmer Usage from the Command Line 日本語 Application Note PDF 208 KB
Industrial Ethernet PHY Application Note PDF 1.21 MB
Industrial Ethernet PHY Application Note PDF 1.30 MB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
Unification of a JEDEC tray and a embossed carrier tape for LQFP package (Additional Information & Correction) 日本語 Product Change Notice PDF 4.86 MB
Unification of a JEDEC tray and a embossed carrier tape for LQFP package 日本語 Product Change Notice PDF 3.74 MB
Unification of a JEDEC tray and a embossed carrier tape for LQFP package 日本語 Product Change Notice PDF 1.46 MB
[Flyer] Renesas Software and Tools Flash Memory Programmer PG-FP6 日本語 Flyer PDF 417 KB
One page guide of RAJ240090/100 Starter Kit Flyer PDF 293 KB
Industrial Power Management Brochure 日本語 Brochure PDF 3.13 MB
One Page Guide RAJ240090 / RAJ240100 Starter Kit Flyer PDF 473 KB
Power supply system Brochure PDF 5.75 MB