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BUY TOP221PN https://www.utsource.net/itm/p/1457025.html
The TOP221PN is a 9W second generation 3-terminal Off-Line PWM Switch provides several enhancements over the first generation TOPSwitch family. Many significant circuit enhancements that reduce the sensitivity to board layout and line transients now make the design even easier. TOPSwitch incorporates all functions necessary for a switched mode control system into a three terminal monolithic IC are power MOSFET, PWM controller, high voltage start up circuit, loop compensation and fault protection circuitry.
The TOP221PN is a fixed frequency, off-line, current-mode PWM controller IC manufactured by Power Integrations. It is designed to provide a high-performance, low-cost solution for AC-DC power supplies. Description: The TOP221PN is a fixed frequency, off-line, current-mode PWM controller IC that provides a high-performance, low-cost solution for AC-DC power supplies. It features a wide range of protection features, including over-voltage protection, over-current protection, and thermal shutdown. The device also features a soft-start function and a low-power standby mode. Features: Fixed frequency, off-line, current-mode PWM controller Wide range of protection features, including over-voltage protection, over-current protection, and thermal shutdown Soft-start function Low-power standby mode Low cost Applications: AC-DC power supplies Switching power supplies Lighting applications Motor control applications (For reference only)