BUY VIPER100A https://www.utsource.net/itm/p/1147824.html
SMPS PRIMARY I.C.
Package Type: TO-220 Manufacturer: ST Description: The VIPER100A is a monolithic integrated circuit from ST designed for use in SMPS (switch mode power supplies) applications. It is a high-voltage, high-speed switch that can be used for voltage-mode and current-mode control. Features: Low turn-on and turn-off times Internal desaturation protection Low power consumption Thermal shutdown protection Small package size Applications: AC-DC converters DC-DC converters Switching regulators Uninterruptible power supply (UPS) Consumer electronics (For reference only)