RAJ240047 is Renesas battery management IC which incorporates a variety of battery fuel gauge features. Embedded Renesas RL78 CPU core has multiple low power modes and achieve high performance in ultra-low power operation. This product consists of MCU device and AFE device in a single package. Fuel gauge control firmware is stored in embedded flash memory and controls 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 product including battery capacity measurement and protection.
  • Supports 2-4 Li-Ion or Li-Polymer battery cells in series.
  • Ultra-low power Renesas RL78 CPU coreBuilt-in flash memory (block erase/write protection) · Flash ROM: 128KB · Data flash: 4 KB
  • Internal SRAM: 5.5 KBCurrent integrating circuit (18-bit ΔΣA/D)
  • 15-bit ΔΣA/D converter (external 3 channels, internal 5 channels including simple temperature sensor)
  • High side N-ch FET control circuit for charge and discharge current protection
  • Overcurrent detection circuit (discharge short-circuit current (2 channels), charge/discharge overcurrent, and wake-up current)
  • Battery voltage detection circuit (4 cells)
  • Battery cell conditioning circuit (4 cells)
  • Pack+ terminal voltage detection circuit
  • FUSE control circuit
  • MCU built-in High-Speed on-chip clock generator
  • AFE on-chip oscillator clock (4.194 MHz)
  • MCU runaway detection circuit
  • MCU build-in watchdog timer
  • Series regulator (VREG2: 3.3 V, VREG1: 1.8 V)
  • Reset circuit (VREG2, VREG1 monitoring)
  • MCU low power modes : HALT and STOP
  • High-Speed on-chip clock oscillator · High-Speed operation :1 to 32 MHz · Low speed operation :1 to 8 MHzI/O port: 12 · CMOS input/output: 6 · CMOS input: 2 · N-ch open drain: 2 · High voltage input: 1 · High voltage output: 1
  • Serial interface: · I2C · UART · Simplified I2C
  • MCU 16-bit timer: 5 channels
  • MCU 12-bit interval timer: 1 channel
  • AFE timer (setting range: 125 ms to 64 s)
  • 8 bits PWM signal generator
  • Intel® Dynamic Battery Power Technology support
  • Impedance measurement circuit
  • Built-in on-chip debug function
  • Self programming function support
  • Power supply voltage: VCC = 4.0 to 25 V
  • Operation ambient temperature: Ta = -20 to +85°C
  • Package Information:
  • Plastic mold QFN (4mm x 4mm x 0.95mm)

Product Options

Part Number Part Status Pkg. Type Carrier Type Buy Sample
Active QFN32

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
RAJ240047 Data Sheet Datasheet PDF 2.57 MB
Application Notes & White Papers
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN1681: Grounding Techniques Application Note PDF 509 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 ( PC-WRP-A001B/E ) 日本語 Product Change Notice PDF 3.74 MB
Unification of a JEDEC tray and a embossed carrier tape for LQFP package ( PC-WRP-A001A/E ) 日本語 Product Change Notice PDF 1.46 MB
Tool News
[Notes] Renesas Flash Programmer 日本語 Tool News - Note PDF 29 KB
Renesas Software and Tools Flash Memory Programmer PG-FP6 日本語, 简体中文 Flyer PDF 417 KB
Industrial Power Management Brochure ( R16CL0001EJ0200 ) 日本語 Brochure PDF 3.13 MB