The RT9455WSC is a highly integrated battery charger IC manufactured by Richtek. It's designed for single-cell Li-ion/Li-polymer battery charging applications, often found in portable devices and power banks. The IC typically incorporates features like constant-current/constant-voltage (CC/CV) charging, over-voltage protection (OVP), over-current protection (OCP), and thermal protection.

Applications

• Smartphones
• Tablets
• Power Banks
• Wearable Devices
• Portable Media Players

Features

• Constant-Current/Constant-Voltage (CC/CV) Charging
• Programmable Charging Current
• Over-Voltage Protection (OVP)
• Over-Current Protection (OCP)
• Thermal Protection
• Automatic Recharge
• LED Indication for Charging Status

Benefits

• Provides safe and efficient battery charging
• Extends battery lifespan through controlled charging algorithm
• Protects the battery and device from damage due to over-voltage or over-current conditions
• Simplifies circuit design with integrated features
• Offers visual indication of charging progress

The RT9455WSC is well-suited for applications requiring a compact and reliable battery charging solution. Its integrated protection features ensure the safety and longevity of the battery and the host device. The programmable charging current allows for customization to different battery capacities and charging requirements.

Technical Specifications:

• Input Voltage Range: Typically 4.5V to 5.5V
• Charging Voltage: Typically 4.2V for single-cell Li-ion/Li-polymer
• Charging Current: Programmable, typically up to 2A (check datasheet)
• Protection Features: OVP, OCP, Thermal Protection
• Operating Temperature: -40°C to +85°C
• Package Type: WDFN or similar small package