BUY SG3842M https://www.utsource.net/itm/p/11761110.html

The SG3842M is a high-performance, fixed-frequency current-mode PWM controller manufactured by Linfinity. It is available in an 8-pin DIP package and is designed for use in off-line and DC-to-DC converters. The SG3842M features a wide operating range of 4.5V to 40V, a high-frequency oscillator, and a temperature-compensated reference. It also has a low-power standby mode, a low-startup current, and a wide range of protection features. The SG3842M is suitable for use in a variety of applications, including switch-mode power supplies, DC-to-DC converters, and off-line converters. It is also suitable for use in battery chargers, motor control, and other applications requiring high-efficiency power conversion. (For reference only)