TOP209PN

AC DC Converters, Offline Switchers Overview

The TOP209PN is a three-terminal off-line PWM switch from the TOPSwitch-II family by Power Integrations. It integrates a high-voltage power MOSFET, current-mode controller, and protection circuitry into a single package. The device supports flyback, forward, boost, and buck topologies with primary or opto feedback. It features built-in auto-restart, current limiting, and latching thermal shutdown for system-level protection. Designed for universal input voltages, it offers low AC/DC losses and high efficiency.

AC DC Converters, Offline Switchers Feature Summary

• Integrates high-voltage power MOSFET, current-mode controller, and protection circuitry
• Supports multiple converter topologies including flyback, forward, boost, and buck
• Includes built-in auto-restart and current limiting mechanisms
• Features latching thermal shutdown for enhanced system safety

AC DC Converters, Offline Switchers Applications

• TV and monitor power supplies
• Audio amplifier power supplies
• General-purpose off-line power adapters
• Battery chargers

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific ordering suffix to confirm the package type and lead time requirements. Ensure the selected variant matches the required thermal and electrical specifications for the target application. Cross-reference the manufacturer's official documentation for accurate pinout and mounting details before finalizing procurement.

AC DC Converters, Offline Switchers Selection Notes

Select this component for cost-effective solutions requiring low component count. It is suitable for applications where design simplicity and reduced time-to-market are priorities. Consider its compatibility with primary or opto feedback loops and its stability in both discontinuous and continuous conduction modes when designing the power stage.

AC DC Converters, Offline Switchers Part Context

As part of the TOPSwitch-II family, the TOP209PN extends the power range capabilities of the original TOPSwitch technology. It provides enhancements over the first generation, offering improved sensitivity to board layout and line transients. This integration allows for significant reductions in system cost and size compared to discrete solutions.

AC DC Converters, Offline Switchers Replacement Considerations

Compatible parts within the TOP209 series may offer variations in power rating or package style. Verify that any substitute maintains the same pinout configuration and electrical characteristics to ensure direct replacement without circuit modification.