BUY TOP250R-TL https://www.utsource.net/itm/p/758345.html
SMPS Controller
Description: TOP250R-TL is a high-efficiency, high-voltage, off-line, fixed-frequency, current-mode PWM controller IC. Features: Wide 4.5V to 42V operating range Low start-up current Internal soft start Internal leading edge blanking Internal over-current protection Internal thermal shutdown Internal over-voltage protection Internal under-voltage lockout Low profile TO-263 package Application: TOP250R-TL is suitable for use in off-line and DC-to-DC fixed-frequency current-mode switching power supplies with minimal external components. It is suitable for applications such as desktop PCs, notebook PCs, LCD TVs, and other consumer electronics. (For reference only)