Overview
Description
The RAJ240091 is a Renesas Li-ion battery fuel gauge IC (FGIC), which consists of an MCU device and an AFE device in a single package. It features the RL78 CPU core with multiple low-power modes, enabling high performance during ultra-low power operation.
This fuel gauge IC includes control firmware stored in embedded flash memory, which manages the operation of its analog and digital circuits. Its core functions include measuring battery voltage, current, and temperature, estimating remaining capacity, and providing protection against overcurrent, overvoltage, and excessive temperature, as well as executing other battery management operations.
Features
- Fully integrated battery management with capacity measurement and programmable protection
- Supports 3 to 7 series Li-ion or Li-Polymer cells
- Operation voltage range: 4.0V to 50V
- Low Power Sleep Mode with Hardware Protection: (25uA typ.)
- Memory: 128kB Code Flash, 4kB Data Flash, and 7kB SRAM
- 19 GPIO ports
- Communication: I2C, UART, and CSI
- High-precision A/D converters, 15-bit ADC for Voltage/Temperature, 18-bit coulomb counter
- Protection: Short circuit, Charge/Discharge over current, Over/Under voltage
- Regulator: 3.3V or 5.0V selectable
- High-side N-channel MOSFET drive for charge/discharge control
- Cell balancing
- Compact 48-pin QFN package, 6.0mm x 6.0mm
Comparison
Applications
- E-Bike
- E-Scooter
- Pedal-Assist Bicycle
- Power Tool
- Vacuum Cleaner
- Drone
- Battery Backup System
- Energy Storage System (ESS)
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 2.60 MB | |
| Flyer | PDF 417 KB 日本語 , 简体中文 | |
2 items
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Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
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