The RT95420CER is a highly integrated synchronous boost charger designed by Richtek USA Inc. This device is optimized for single-cell Li-ion and Li-Polymer battery charging applications where the output voltage needs to be boosted above the input voltage. It is particularly well-suited for applications utilizing USB Power Delivery (PD) or other fast-charging protocols.

Applications:

• Power Banks: Used to charge mobile devices quickly and efficiently from a single-cell battery source.
• USB PD Adapters: Enables USB Power Delivery functionality in wall adapters and car chargers.
• Portable Devices with USB-C Charging: Facilitates fast charging of smartphones, tablets, and other devices via USB-C ports.
• Wireless Charging Transmitters: Provides the necessary voltage boost for wireless charging applications.
• Single-Cell to 5V Boost Converters: Boosts the voltage from a single-cell battery to a stable 5V output.

Features:

• Synchronous Boost Converter: Ensures high efficiency and minimal power loss during voltage boost.
• USB Power Delivery (PD) Support: Compatible with USB PD fast-charging protocols.
• Programmable Charging Current and Voltage: Allows for customization to match different battery specifications.
• Input Overvoltage Protection (OVP): Protects the device from excessive input voltage.
• Output Overvoltage Protection (OVP): Protects the battery and connected devices from output overvoltage conditions.

Benefits:

• Fast Charging: Enables rapid charging of batteries, reducing downtime.
• High Efficiency: Minimizes power loss and heat generation, improving overall system performance.
• USB Power Delivery Compatibility: Supports the latest USB PD fast-charging standards.
• Robust Protection: Includes comprehensive protection features to ensure device and battery safety.
• Flexible Configuration: Programmable charging parameters allow for customization to different battery types and sizes.

The RT95420CER typically operates with a wide input voltage range and can deliver a stable output voltage with a programmable current limit. It features thermal shutdown protection to prevent overheating and ensure reliable operation. The device is often available in compact package options to minimize board space. In addition, it includes features such as soft-start to reduce inrush current and improve system stability. The RT95420CER's combination of high efficiency, USB PD compatibility, and robust protection makes it an ideal choice for advanced battery charging applications.