描述 Description

RAJ240055/RAJ240057 are Renesas battery fuel gauge and management devices which combine a separate MCU and AFE blocks in a single package to accomplish various battery protection and management functions. RAJ240055/RAJ240057 incorporate 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.

特性 Features

? Fully integrated battery management solution with battery capacity measurement and programmable protection capability.
? Supports up to 4 Li-ion or Li-Polymer battery cells in series.
? Supports various self-diagnosis functions for functional safety.
? Integrated with Renesas Ultra Low Power RL78 CPU core for multi-function process.
? Memory?
Code flash memory: 64 kB (RAJ240055) / 128 kB (RAJ240057)?
Data flash memory (up to 100,000 erase/write cycles): 4 kB?
SRAM: 4 kB (RAJ240055) / 7 kB (RAJ240057)
? 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?
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?
CSI (SPI): 1 channel?
UART: 2 channels?
Simplified I2C: 1 channel?
I2C: 1 channel
? Timer?
MCU 16-bit timer: 6 channels?
MCU 12-bit interval timer: 1 channel?
AFE timer: 2 channels
? AFE timer A: setting range: 125 ms to 64 s
? AFE timer B: setting range：61 us to 2 s