BUY NCP1207A https://www.utsource.net/itm/p/1366420.html
PWM Current-Mode Controller for Free Running Quasi-Resonant Operation
NCP1207A is a high performance, low cost, current mode PWM controller IC designed for off-line and DC-to-DC converter applications. It is available in an 8-pin SOP package. Description: The NCP1207A is a current-mode PWM controller designed for off-line and DC-to-DC converter applications. It provides a high performance, low cost solution for applications such as switch-mode power supplies, battery chargers, and DC-DC converters. The device features a wide operating frequency range, adjustable soft-start, programmable over-current protection, and a wide range of output voltage options. Features: Wide operating frequency range (50kHz to 500kHz) Adjustable soft-start Programmable over-current protection Wide range of output voltage options Low cost solution 8-pin SOP package Applications: Switch-mode power supplies Battery chargers DC-DC converters (For reference only)