Battery Management

Dedicated Single-Chip Solution with MCU and AFE for Battery Management Systems

Overview

Renesas offers a dedicated single-package solution with an MCU and analog front end (AFE) for battery management systems that constantly monitors the battery state.

Advantages

Safety Features

  • Built-in self-diagnostic functions for microcontroller and analog front-end (AFE)
  • Low power mode for safe storage

High Accuracy

  • High-precision delta-sigma A/D converter specialized for current, voltage, and temperature detection
  • Battery level calculation takes battery deterioration into account

Design Support and Tools

  • Starter Kits include evaluation board with reference design and sample firmware for fast prototyping.
  • Application Notes and training videos (Under preparing)
  • Regional support : Please consult your Renesas sales representative or office.

Product Overview

Product

Cells

Voltage

[V]

ROM/RAM

Serial

Interfaces

I/O

Key Features

Package

Min

Max

RAJ240045

2

4

4 - 25

64KB/4KB

I²C, UART

12

Small package

32-pin QFN

RAJ240500

1

3

4 - 25

128KB/5.5KB

I²C, UART

9

Built-in charger

40-pin QFN

RAJ240080

2

5

4 - 28

64KB/5.5KB

I²C, UART

22

Multiple GPIO

48-pin LQFP

RAJ240090

(New)

3

8

4 - 50

128KB/7KB

I²C, UART, CAN

31

Multiple GPIO

High voltage

MCU and AFE in a single package

64-pin LQFP

RAJ240100

(New)

3

10

4 - 50

128KB/7KB

I²C, UART, CAN

31

Multiple GPIO

High voltage

MCU and AFE in a single package

64-pin LQFP

Typical Applications

Power Management - Typical Applications

 

Click here for details.

Power tool

 

Block Diagram

Power Management - Block Diagram

Development Environment

Reference Board:

- Evaluate the device characteristics and performance

- E1 connector for on-chip debugging

 

Sample Program:

- Provide the source code of sample code with basic function of battery control.

- Output the battery status such as Voltage, Current and Temperature via I2C Bus I/F

 

Standard Firmware:

- Provide the object code of standard F/W to achieve the safety control and capacity

calculation by only parameter setting.

 

When you would like to get the reference boards, sample codes and standard firmware, please contact to your regional sales channels.

 

Battery Management - Board