Power Integrations, Inc. AC DC Converters, Offline Switches TOP221P

The TOP221P is part of the TOPSwitch-II family of offline PWM switches designed for AC to DC conversion. It offers a compact three-terminal solution that integrates a power MOSFET, PWM controller, high-voltage startup circuit, and fault protection circuitry, which simplifies the design process and reduces component count. The device supports multiple topologies, including Flyback, Forward, Boost, and Buck, making it versatile for various applications such as TVs, monitors, and audio amplifiers. With a power range of up to 15W for 100/115/230 VAC input and 10W for universal input (85-265 VAC), the TOP221P achieves high efficiency, with losses as low as 10%. It features built-in auto-restart, current limiting, and latching thermal shutdown for enhanced system protection. The device is stable in both discontinuous and continuous conduction modes, and its design minimizes sensitivity to board layout and line transients, facilitating easier implementation. The package options include TO-220, DIP-8, and SMD-8, allowing for flexibility in integration.