BUY SG6841S https://www.utsource.net/itm/p/364721.html
High-integrated Green-mode PWM Controller
Description: The SG6841S is a high voltage, high speed, fixed frequency current mode PWM controller. Features: Wide 4.5V to 40V operating input voltage range Internal soft start Under voltage lockout Over voltage protection Thermal shutdown Fixed frequency current mode control High speed oscillator Low start up current Low standby current Low operating current Low external component count Applications: Switch mode power supplies DC/DC converters Battery chargers AC/DC adapters LED lighting (For reference only)