Renesas Battery Level Management IC Products

Product Summary

The battery level management IC (FGIC) monitors and manages the battery status (voltage, current, temperature) in products equipped with lithium-ion batteries (Li-ion batteries). It also plays a role in managing and controlling the battery to improve its safety and extend its life. Details of the management and control are as follows.

-Highly accurate remaining charge detection (capacity, mAh, mWh) that takes battery deterioration into account
- Battery remaining capacity prediction: remaining operating time (minutes), charging time (minutes)
- Self-diagnosis function to improve system safety
- Uniform charge/discharge control for batteries made up of multiple cells (cell balancing)
- Log management to help with troubleshooting

Features

Renesas' FGIC is a single-chip package that combines the company's RL78 MCU and analog front-end (AFE).
It provides an advanced, programmable battery management system.

Main features

Features	explanation
Safety and protection control	-Built-in self-diagnosis function for MCU and AFE -Protection functions (overvoltage, undervoltage, overcharge/overdischarge, short circuit current, high / low temperature)
High precision	-Current measurement 18-bit ΔΣ ADC -Voltage/Temperature Measurement 15-bit ΔΣ ADC (RAA241200 is an 18-bit ΔΣ ADC)
Reduction in number of components and high integration	-MCU and AFE in one package -Nch FET driver is used. Supports large current discharge. - Equipped with CAN interface (RAJ240090/100) -MCU regulator - Cell Balancer
Low power consumption	Sleep Current 10 μA (RAA241200) 25μA (RAJ240090/100, 301, 310)

No additional firmware development required "R-BMS F"

By using Renesas' R-BMS F, battery management systems can be designed easily and quickly without the need for additional firmware development, significantly shortening time to market.
*Compatible with RAJ240100 (for 3 to 10 cells)

Product Specifications

Block Diagram

lineup

A product lineup with a range of battery cell counts from 1 to 10 cells is available, making it suitable for a variety of applications.

Number of cells in series: 1 to 4 cells

model number	RAA241200	RAJ240055	RAJ240057
Number of cells in series	1	2～4
Supply voltage (V)	2.0～5.5	2.2～25
Common Interface	I2C, UART
Flash ROM size (KB)	64		128
Charge/discharge FET control method	Low side	High side
package	16WLBGA 1.87×2.48mm	32QFN 4.00×4.00mm

Number of cells in series: 3 to 10 cells

model number	RAJ240301	RAJ240090	RAJ240100 (R-BMS F compatible)	RAJ240310
Number of cells in series	3～7	3～8	3～10
Supply voltage (V)	4.0～40	4.0～50		8.0～50
Common Interface	I2C, UART	I2C, UART, CAN		I2C, UART
Flash ROM size (KB)	64	128		64
Charge/discharge FET control method	Low side	Low / High side		Low side
package	48QFP 7.00×7.00mm	64QFP 10.0×10.0mm		40QFN 5.00×5.00mm

Developer Kit Product Specifications

We have prepared a starter kit for customers to evaluate FGIC. This kit includes device files, sample code, monitor tools, USB drivers, and documentation.

Application example

It supports a wide range of applications, from small current products to products equipped with multiple cell batteries that require large current.

·smartphone
·laptop
·Electric tool
·Electric bicycle
・Handy cleaner
·UPS
·handy terminal
·Carrier machine

Inquiry

Renesas' FGIC can manage and control lithium-ion batteries with high precision.
By contributing to a reduction in the number of parts and high integration, the R-BMS F can also shorten development time.
If you are interested, please contact us below.