RAJ240045 Datasheet, PDF (1/67 Pages) Renesas Technology Corp – Integrated Li-ION Battery Managemer for 2-4 Series Cell

Data Sheet
RAJ240045
Integrated Li-ION Battery Managemer for 2-4 Series Cell
Rev.0.10
2016/07/06
1. Introduction
1.1 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 core
Built-in flash memory (block erase/write protection)
 Flash ROM: 64 KB
 Data flash: 4 KB
Internal SRAM: 4KB
Current integrating circuit (18 bits ΔΣA/D)
15 bitsΔΣA/D converter (external 2 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
High speed on-chip clock oscillator
 High speed operation :1 to 32 MHz
 Low speed operation :1 to 8 MHz
I/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 bits timer : 5 channels
MCU 12 bits interval timer :1 channel
AFE timer (setting range:125 ms to 64 s)
8 bits PWM signal generator
Intel® Dynamic Battery Power Technology support
Impedacne 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
MCU build-in watchdog timer
Series regulator (VREG2:3.3 V,VREG1:1.8 V)
Reset circuit (VREG2, VREG1 monitoring)
Package Information :
Plastic mold QFN (4mm x 4mm x 0.95mm)
1.2 Applications
 Notebook PC, Tablet PC, Docking Station
 Handheld measurement equipment, POS system
 UPS, Power bank
1.3 Description
RAJ240045 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. RAJ240045 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.