Power Integrations, Inc. AC DC Converters, Offline Switches LNK4323S

The LNK4323S is part of the LinkSwitch-4 family of AC-DC converters designed for low power applications such as chargers and adapters. It simplifies constant voltage/constant current (CV/CC) converter designs by eliminating the need for an optocoupler and secondary control circuitry, which reduces complexity and component count. The device features dynamic base drive technology that optimizes the switching characteristics of BJTs, enhancing efficiency and performance. This converter operates with a maximum output power of 8 W and supports input voltages ranging from 85 to 265 VAC. It incorporates advanced protection features including overvoltage and short-circuit protection, as well as thermal shutdown capabilities. The LNK4323S is designed to meet energy efficiency standards, achieving a no-load consumption of less than 30 mW at 230 VAC input, making it suitable for energy-sensitive applications. The device is packaged in a compact SO-8 format, facilitating integration into various designs. Its applications include chargers for portable devices such as cell phones, PDAs, and MP3 players. Overall, the LNK4323S offers a reliable and efficient solution for engineers looking to implement low power AC-DC conversion in their projects.