The VIPER122LSTR is a high-voltage offline converter from STMicroelectronics, designed for cost-effective and energy-efficient power supplies. It integrates a power MOSFET and PWM controller into a single package, enabling the design of compact and reliable switch-mode power supplies (SMPS). This IC supports both flyback and buck converter topologies, with features such as built-in protections against overvoltage, overcurrent, and thermal overload. Its low standby power consumption makes it ideal for applications such as home appliances, industrial equipment, and auxiliary power supplies. Packaged in a compact SO-8 form, it simplifies design while ensuring robust performance.