RAJ240090A20GFP#HC3

Battery Management Overview

The RAJ240090A20GFP#HC3 is a battery management IC from Renesas Electronics designed for lithium-ion and lithium-polymer battery packs. It supports up to 9 series-connected cells, distinguishing it from the RAJ240100 which handles up to 10. The device integrates an RL78 CPU core with 128KB code flash, 4KB data flash, and 7KB SRAM. It features a high-precision AFE with 15-bit resolution sigma-delta ADCs for cell voltage and temperature monitoring, and an 18-bit current measurement ADC. Operating voltage ranges from 4V to 50V, with an operating temperature range of -40°C to +85°C.

Battery Management Feature Summary

• Fully integrated battery management solution combining capacity measurement and programmable protection functions.
• Supports up to 9 series-connected lithium-ion or lithium-polymer batteries.
• Integrates an ultra-low power RL78 CPU core for versatile processing tasks.
• Includes embedded high-side N-channel MOSFET driver circuits for charging and discharging control.

Battery Management Applications

• Battery pack management for portable electronic devices
• Power tool battery systems
• Medical equipment battery modules
• Uninterruptible power supply (UPS) systems

Battery Management Procurement Notes

Verify the specific suffix HC3 against official Renesas documentation to confirm package type and tape/reel specifications. Ensure compatibility with the target PCB footprint for the LQFP-64 package. Confirm that the application requires support for exactly 9 series cells, as this model differs from the 10-cell RAJ240100 variant. Check moisture sensitivity levels and reflow soldering profiles prior to assembly.

Battery Management Selection Notes

Select this component when a system requires management of up to 9 series-connected lithium cells. It is suitable for applications needing integrated fuel gauge capabilities alongside overcharge and overdischarge protection. Consider the internal RL78 CPU if custom algorithms or communication protocols are required. Compare against the RAJ240100 if 10-cell support is necessary instead.

Battery Management Part Context

This part belongs to the RAJ240090 series of mixed-signal battery management ICs. It shares architectural similarities with the RAJ240100 but is specifically configured for 9-series cell stacks. The series utilizes the RL78 microcontroller architecture for flexible firmware implementation. It is part of Renesas's portfolio of power management solutions for battery-operated equipment.

Battery Management Replacement Considerations

The RAJ240100A20GFP#HC3 serves as a direct functional substitute for systems requiring support for up to 10 series cells instead of 9. Both parts share the same package, pinout, and core architecture. Verify that the additional cell channel does not impact board layout constraints.