The RT9545SCE is a highly integrated single-cell Li-ion battery charger IC from Richtek USA Inc. It is designed to efficiently and safely charge single-cell lithium-ion batteries commonly used in portable devices.

Applications:

• Portable Media Players
• Bluetooth Devices
• GPS Devices
• MP3/MP4 Players
• Low-Power Handheld Devices

Features:

• High integration minimizes external components
• Constant Current/Constant Voltage (CC/CV) charging algorithm
• Programmable charging current
• Pre-charge conditioning for deeply discharged batteries
• Automatic recharge
• Thermal protection
• Overvoltage protection
• Short circuit protection
• Input overvoltage protection
• Charge status indicator
• Low dropout operation

Benefits:

• Extended battery life due to optimized charging algorithm
• Increased system reliability through comprehensive protection features
• Reduced board space requirements due to high integration
• Simplified design and faster time-to-market
• Safer operation due to thermal and overvoltage protection

Additional Details:

The RT9545SCE utilizes a constant current/constant voltage (CC/CV) charging algorithm, which is essential for safely and efficiently charging lithium-ion batteries. It typically includes features such as pre-charge conditioning to revive deeply discharged batteries before initiating the full charging cycle. It features protection mechanisms to prevent overvoltage, overcurrent, short circuits, and overheating during the charging process, ensuring the safety of the battery and the device. The charge current is often programmable, allowing designers to tailor the charging profile to the specific battery used. The IC also monitors the battery temperature and voltage, adjusting the charging parameters accordingly. The RT9545SCE usually includes a charge status output, allowing a microcontroller or other system component to monitor the charging progress. It comes in small packages to support highly compact application.