Renesas battery management IC

The Renesas battery management IC for lithium-ion (Li-ion) is designed for rechargeable batteries used in industrial equipment, such as electric power tools.

The RAJ240090 supports three to eight cells, while the RAJ240100 supports three to 10 cells. They simplify the design of industrial battery management systems, providing a high degree of safety.

The product includes an integrated microcontroller (MCU) that enables flexible support for a wide variety of industrial battery system specifications. It integrates the remaining capacity measurement and safety monitoring functions, such as overvoltage and overcurrent, into a single package to provide flexible support for a wide variety of industrial battery system specifications. This provides a high-precision A/D converter (required for battery control voltage measurement) and MCU that have been matched and adjusted beforehand.

In addition, the peripheral functions required by industrial applications, including power supply, field effect transistor (FET) driver and real-time clock, are included on-chip.

Other features include rich design support tools that enable even beginners to easily implement battery systems with a high level of safety, and maintenance of high safety level through constant safety monitoring in ultralow-power mode. This provides the ability to safely shut down the system if a problem occurs.

A record-keeping function can store information such as battery history to monitor deterioration and store system faults in the MCU memory. The MCU can issue an alarm and disable battery to prevent Li-ion battery failure.