Power Integrations LNK304GN-TL Off-Line Switcher IC, PDIP-8

The Power Integrations LNK304GN-TL is a leading-edge off-line switcher IC from the LinkSwitch-TN family, engineered to deliver the lowest component count and high energy efficiency. It is the ideal, cost-effective replacement for traditional linear and capacitor-fed non-isolated power supplies in applications with output currents under 360mA. By integrating a 700V power MOSFET, oscillator, control circuitry, and protection features onto a single monolithic chip, it provides superior performance and reliability.

A major advantage is its simplified design. The IC derives its start-up and operating power directly from the voltage on the DRAIN pin, eliminating the need for a separate bias supply and its associated circuitry in buck or flyback converter configurations. This integration, combined with a fully featured auto-restart circuit, provides robust protection against fault conditions like short-circuits or open loops, enhancing system safety and further reducing the need for external components.

Key Features & Benefits

• EcoSmart™ Technology: Offers extremely high energy efficiency, making it ideal for eco-conscious designs.
• High Integration: Combines a power switch, control, and protection in one IC for the lowest system cost and component count.
• Enhanced EMI Performance: Integrated frequency jittering dramatically reduces electromagnetic interference by approximately 10dB, minimising the cost and size of required EMI filters.
• Robust Protection: Features cycle-by-cycle current limiting, thermal shutdown, and auto-restart for comprehensive fault protection.
• Stable Performance: Provides tight output tolerances with negligible variation over temperature, ensuring consistent operation.

This versatile IC supports multiple topologies including Buck, Buck-Boost, and Flyback, offering designers great flexibility. Housed in a robust plastic surface-mount DIP (PDIP-