Power Integrations, Inc. AC DC Converters, Offline Switches TOP225Y

The TOP225Y is part of the TOPSwitch-II family of offline PWM switches designed for AC to DC conversion. It offers a power range of up to 150W for 100/115/230 VAC input and up to 90W for a wide input range of 85-265 VAC. The device features high efficiency, achieving up to 90% efficiency with low AC/DC losses, making it suitable for applications requiring cost-effective power solutions. The integrated design includes a power MOSFET, PWM controller, high-voltage startup circuit, and fault protection circuitry, all within a three-terminal monolithic IC. It supports multiple topologies, including Flyback, Forward, Boost, and Buck, and is stable in both discontinuous and continuous conduction modes. The device also incorporates built-in auto-restart, current limiting, and latching thermal shutdown for enhanced system protection. The TOP225Y is available in a TO-220 package, which facilitates heat dissipation without the need for additional heat sinks, thus reducing overall system costs. This product is particularly suitable for applications such as televisions, monitors, and audio amplifiers, where design simplicity and efficiency are critical.