BUY UC3842B https://www.utsource.net/itm/p/11249848.html

Description: The UC3842B is a high performance current mode controller. It is specifically designed for off-line and DC-to-DC converter applications offering the designer a cost effective solution with minimal external components. Features: * High performance current mode control * Low start-up current * Internal slope compensation * Internal soft-start * Cycle-by-cycle current limiting * Under-voltage lockout * Thermal shutdown Applications: * Switching power supplies * Off-line converters * DC-to-DC converters * Motor control (For reference only)