描述 Description

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.

特性 Features

? 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)

應用 Application

? Li-ion Battery Management Solution
? 多電池 USB-PD + QC2 & QC3 移動電源