LNK6418K

AC DC Converters, Offline Switchers Overview

The LNK6418K is a LinkSwitch-3 family AC/DC converter IC designed for primary-side regulation. It integrates a 725 V power MOSFET, ON/OFF control state machine, and high-voltage switched current source. The device operates at a switching frequency of 85 kHz and delivers up to 10 W output power. It supports an input voltage range from 90 VAC to 264 VAC. The component functions as a CV/CC switcher with hysteretic thermal shutdown and cycle-by-cycle current limit. It utilizes eSOP-12B-5 packaging and silicon technology.

AC DC Converters, Offline Switchers Feature Summary

• Eliminates optocoupler and secondary control circuitry through advanced primary-side regulation
• Compensates for transformer inductance tolerances, input line variations, and cable voltage drop
• Incorporates frequency jittering to reduce EMI filter costs
• Features hysteretic thermal shutdown with automatic recovery

AC DC Converters, Offline Switchers Applications

• Adapters and chargers
• Low power CV/CC converters
• Global energy efficiency compliant power supplies

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix against official documentation, as package and tape/reel specifications may vary between variants such as TL or K. Confirm RoHS compliance status and moisture sensitivity levels prior to assembly. Ensure the ordering part number matches the required switching frequency and package type defined in the manufacturer's datasheet to avoid integration errors.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring simplified topology without secondary side feedback loops. The integrated 725 V MOSFET allows for high-voltage operation suitable for universal input ranges. Consider the fixed minimum operating frequency for transient load response requirements. Verify that the target application fits within the 10 W power envelope and thermal constraints of the eSOP-12B-5 package.

AC DC Converters, Offline Switchers Part Context

This device belongs to the LinkSwitch-3 family from Power Integrations. The family focuses on monolithic integration of power and control functions to minimize external component count. It targets low-power applications where cost and board space are critical constraints while maintaining strict regulatory compliance for no-load consumption.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official substitution guides for compatible LinkSwitch-3 variants with different switching frequencies or power ratings. Verify pinout compatibility and electrical parameter alignment before replacing.