The RT9541CCER is a single-cell Li-ion/Li-Polymer battery charger IC manufactured by Richtek USA Inc. It is designed for portable applications requiring efficient and safe charging of single-cell batteries. The device is capable of operating from both USB and AC adapter power sources and incorporates several protection features to ensure battery safety and longevity.

Applications:

• Smartphones: Charging solution for single-cell batteries in smartphones.
• Tablets: Used to charge single-cell Li-ion/Li-Polymer batteries in tablet computers.
• Portable Speakers: Integrated to manage battery charging in portable audio devices.
• Wearable Devices: Suitable for charging batteries in smartwatches and fitness trackers.
• Low-Power Handheld Devices: Ideal for various handheld gadgets requiring compact and efficient battery charging.

Features:

• USB/AC Adapter Input: Supports charging from both USB ports and AC adapters.
• Constant Current/Constant Voltage (CC/CV) Algorithm: Employs the standard CC/CV charging method for optimal battery charging.
• Pre-charge Function: Provides a pre-charge mode for deeply discharged batteries.
• Overvoltage Protection (OVP): Includes OVP to prevent damage from overvoltage conditions.
• Overcurrent Protection (OCP): Incorporates OCP to protect the battery from excessive charging current.

Benefits:

• Efficient Battery Charging: Ensures efficient and reliable charging of single-cell Li-ion/Li-Polymer batteries.
• Battery Safety: Incorporates multiple protection features for enhanced battery safety.
• Wide Input Voltage Range: Accommodates a wide range of input voltages from USB and AC adapters.
• Compact Solution: Small form factor suitable for space-constrained applications.
• Simplified Design: Requires minimal external components, simplifying the design process.

The RT9541CCER typically features a programmable charging current to match different battery capacities. It includes thermal shutdown protection to prevent overheating during charging. The device offers end-of-charge termination to prevent overcharging and prolong battery life. Furthermore, automatic recharge functionality maintains the battery at full charge. The RT9541CCER’s compact size, comprehensive feature set, and robust protection mechanisms make it a popular choice for single-cell battery charging applications.