The document provides an overview of the ViperPlus AC-DC conversion integrated circuit from STMicroelectronics. It describes ViperPlus as a high-voltage converter that can accept 115 or 230V mains power and efficiently convert it to low-voltage DC. Key features include valley switching operation, adjustable overvoltage protection, auto-restart after faults, and thermal shutdown protection. Typical applications include adapters, auxiliary power supplies, and switched-mode power supplies.