LNK363DN

AC DC Converters, Offline Switchers Overview

The LNK363DN is an energy-efficient, low-power off-line switcher IC from the LinkSwitch-XT family by Power Integrations. It integrates a 700 V power MOSFET, oscillator, ON/OFF control scheme, high-voltage switched current source, frequency jittering, cycle-by-cycle current limit, and thermal shutdown circuitry into a monolithic IC. The device operates with a switching frequency of 132 kHz and a maximum duty cycle of 60%. It supports universal input voltages ranging from 85 VAC to 265 VAC. The typical operating supply current is 200 uA. It provides output power capabilities of 4.7 W at 85-265 VAC and 7.5 W at 230 VAC. The component is housed in an SOIC-8 package (SO-8C) and functions within a temperature range of -40°C to +150°C.

AC DC Converters, Offline Switchers Feature Summary

• Self-biased supply derived directly from the DRAIN pin eliminates the need for transformer auxiliary windings and associated bias supply components.
• Frequency jittering significantly reduces electromagnetic interference (EMI).
• Fully integrated auto-restart mechanism provides protection against short circuits and open loop faults.
• Accurate hysteretic thermal shutdown with automatic recovery improves field reliability.

AC DC Converters, Offline Switchers Applications

• Chargers and adapters for cell phones, PDAs, and digital cameras
• MP3 players and portable media devices
• Low power offline converter systems requiring minimal component count

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix and packaging configuration when ordering, as availability may vary between tube, reel, or cut tape formats. Confirm RoHS compliance status and ensure the supplier documentation matches the exact part number variant. Check for any recent product change notices regarding packaging or sourcing updates before finalizing procurement plans.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs prioritizing lowest system cost through reduced component count and simplified transformer construction. It is suitable for applications requiring clampless designs and elimination of bias windings. Ensure the design accommodates the 700 V drain voltage rating and utilizes the simple ON/OFF control scheme without needing loop compensation.

AC DC Converters, Offline Switchers Part Context

The LNK363DN belongs to the LinkSwitch-XT family, which offers superior performance over linear and RCC solutions. It is designed for universal input operation worldwide. The series emphasizes high reliability through very low component counts and support for single-sided printed circuit boards. It serves as a direct replacement for older LYTSwitch generations in similar power applications.

AC DC Converters, Offline Switchers Replacement Considerations

The LNK363DG-TL is a documented alternative within the same family offering similar functionality. Verify pin compatibility and thermal characteristics when substituting. Cross-reference datasheets for minor variations in packaging or suffix codes that may affect mounting or handling requirements.