R01DS0399EJ0100
Rev.1.00
RAJ240055 / RAJ240057 Data sheet
2 to 4 Series Li-ion Battery Manager
Dec. 29, 2022
CHAPTER 1. INTRODUCTION
1.1
Features
◼ Fully integrated battery management solution with
battery capacity measurement and programmable
protection capability.
◼ Impedance measurement circuit
Simultaneous measurement of battery voltage and current
◼ Over current detection circuit
Short circuit current detection: 2 channels
Charge overcurrent detection
◼ Supports up to 4 Li-ion or Li-Polymer battery cells in
series.
◼ Supports various self-diagnosis functions for functional
safety.
Discharge overcurrent detection
Charge wakeup current detection
◼ Integrated with Renesas Ultra Low Power RL78 CPU core
for multi-function process.
Discharge wakeup current detection
DBPT current detection
◼ Memory
◼ Series regulator
Code flash memory: 64 kB / 128 kB
Data flash memory (up to 100,000 erase/write cycles): 4 kB
SRAM: 4 kB / 7 kB
2.0 V or 3.3 V output can be selected (> 20 mA)
◼ Charge and Discharge MOSFET control
Supports High-side Nch MOSFET drive (built-in charge pump
circuit)
◼ Clock generator
High speed on-chip oscillator: up to 32 MHz
Low speed on-chip oscillator: 15 kHz
AFE high speed on-chip oscillator: 4.194 MHz
AFE low speed on-chip oscillator: 131.072 kHz
◼ General Purpose I/O Ports
◼ Ultra Low Power consumption
Power down mode: 1 uA
Sleep mode1 current: 20 uA (DFET and CFET off)
Sleep mode2 current: 40 uA (DFET and CFET on)
In Sleep mode, enable H/W protection function
◼ Additional features
Total: 12 pins
CMOS input/output: 6, CMOS input: 1
N-ch open drain Input/output [6 V tolerance]: 3
High voltage input [30 V tolerance]: 1
High voltage input/output [VCC tolerance]: 1
◼ Serial interface
Internal Cell Balancing Circuit (>10 mA)
Internal Watchdog Timer (MCU)
MCU Runaway Detection Circuit (AFE)
3 Thermistor Sensor Ports with On-chip Pull-up Resistors
Random cell connection tolerant
CSI (SPI): 1 channel, UART: 2 channels
Simplified I2C: 1 channel, I2C: 1 channel
◼ Timer
◼ Voltage and temperature condition
Power supply voltage: VCC = 2.2 to 25.0 V
Operating ambient temperature TA = -40 to +85°C
◼ Package Information
MCU 16-bit timer: 6 channels
MCU 12-bit interval timer: 1 channel
AFE timer: 2 channels
32 pin plastic mold QFN
([Body] 4.0 mm x 4.0 mm, 0.4 mm pitch)
◼ Device Lineup
-
-
AFE timer A: setting range: 125 ms to 64 s
AFE timer B: setting range：61 us to 2 s
Device
Flash ROM
64 kB
Data Flash
RAM
4 kB
7 kB
◼ Embedded A/D converter
RAJ240055
RAJ240057
4 kB
AFE 15-bit resolution sigma-delta A/D converter
- Automatic measurement mode
128 kB
- Continuous measurement mode
◼ Current integrating circuit
18-bit resolution sigma-delta A/D converter
1.2
Applications
Notebook PC, Tablet PC
1.3
Description
RAJ24005X is a Renesas battery fuel gauge and management device which combines a separate MCU and AFE blocks in
a single package to accomplish various battery protection and management functions. This device incorporates advanced
battery management features such as primary and secondary protection, voltage and current measurement, current
integrating, and host communication interface. Through user programmable control firmware and configuration data stored
in the onboard MCU’s embedded flash memory, the embedded analog and digital hardware circuits offer optimum battery
management operations including high accuracy remaining capacity estimation and battery safety.
R01DS0399EJ0100 Rev.1.00
Dec. 29, 2022
Page 1 of 74
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