LNK6404D

AC DC Converters, Offline Switchers Overview

The LNK6404D-TL is a LinkSwitch-3 AC/DC converter designed for low-power applications. It operates within an input voltage range of 85 VAC to 265 VAC and delivers up to 3.5 W of output power. The device supports constant voltage and constant current regulation. It utilizes a SO-8 package and incorporates a 725 V power MOSFET. The integrated control state machine eliminates the need for optocouplers and secondary circuitry, simplifying design.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage power MOSFET with novel ON/OFF control state machine
• Eliminates optocoupler and secondary feedback circuitry requirements
• Provides accurate output voltage regulation and current flow control
• Compensates for transformer inductance tolerances and input line variations

AC DC Converters, Offline Switchers Applications

• Low power CV/CC charger designs
• Adapters and auxiliary power supplies
• LED lighting systems
• Consumer electronics requiring isolated DC-DC conversion

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix (e.g., -TL) against the required packaging format such as cut tape or reel. Confirm RoHS compliance status through official manufacturer documentation prior to ordering. Ensure the selected variant matches the exact pinout and thermal requirements for the target PCB layout. Cross-reference the datasheet revision date to guarantee access to the most recent electrical specifications and reliability data.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs prioritizing minimal external component count and reduced bill of materials cost. The integrated compensation features simplify transformer selection by accounting for manufacturing tolerances. Consider the SO-8 package constraints regarding thermal dissipation when designing for maximum load conditions. Evaluate the fixed switching frequency options to optimize magnetic component size relative to system noise requirements.

AC DC Converters, Offline Switchers Part Context

This part belongs to the LinkSwitch-3 family from Power Integrations, representing an evolution in offline switcher technology. The series focuses on high integration levels to reduce assembly complexity. It targets the low-power segment where cost efficiency and board space are critical factors. The architecture distinguishes itself by removing traditional optocoupler dependencies found in earlier generations.

AC DC Converters, Offline Switchers Replacement Considerations

Check for direct cross-references within the LinkSwitch-XT2 or LinkSwitch-PH families if higher power or different package options are needed. Verify pin compatibility before substituting with other PI ICs. Consult official replacement guides for any updated versions with improved thermal performance or extended operating temperature ranges.