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

The Power Integrations LNK304GN-TL Off-Line Switcher IC is a PDIP-8 power switching device designed for non-isolated power supplies with output currents under 360 mA.

Overview

The LNK304GN-TL is part of the LinkSwitch-TN family of off-line switcher ICs. It integrates a 700 V power MOSFET, oscillator, control circuitry and protection features onto a single monolithic chip, designed to provide a low component count and high energy efficiency. It is intended as a replacement for traditional linear and capacitor-fed non-isolated power supplies in applications with output currents under 360 mA.

The IC derives its start-up and operating power directly from the voltage on the DRAIN pin. This removes the need for a separate bias supply and its associated circuitry in buck or flyback converter configurations. Combined with a fully featured auto-restart circuit, this helps protect against fault conditions such as short circuits and open loops, supporting system safety while reducing the number of external components required.

Key Features

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

Topologies

The device supports Buck, Buck-Boost and Flyback topologies, giving designers flexibility across different power supply configurations. It is housed in a plastic PDIP-8 package.

Dimensions

Listed dimensions are 3 (width), 2.5 (depth) and 4 (height), with a product weight of 2.268 gm.

Choose the Power Integrations LNK304GN-TL Off-Line Switcher IC when a compact, integrated switching solution is required for non-isolated buck, buck-boost or flyback power supply designs with output currents under 360 mA.