LNK305DN-TL

AC DC Converters, Offline Switchers Overview

The LNK305DN-TL is an offline switcher from the LinkSwitch-TN family, designed for cost-effective AC/DC conversion. It integrates a 700V power MOSFET with a controller in an SO-8C package. The device supports buck, buck-boost, and flyback topologies at a fixed 66 kHz switching frequency. It delivers up to 280 mA output current in continuous conduction mode (CCM) or 175 mA in multi-discharge constant mode (MDCM). Operating temperatures range from -40°C to +150°C junction temperature.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage power MOSFET and control circuitry into a single compact package.
• Provides fully integrated auto-restart protection against short-circuit and open-loop faults.
• Features accurate current limiting at 66 kHz operation to enable low-cost magnetic components.
• Supports multiple converter topologies including buck, buck-boost, and flyback configurations.

AC DC Converters, Offline Switchers Applications

• Cost-effective linear or capacitor dropper replacements
• Low component count buck converter solutions
• General purpose AC/DC power supplies

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix DN indicates the SO-8C surface mount package variant. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure design accounts for the specified thermal limits and operating temperature range of -40°C to +150°C. Cross-reference datasheet DER-049 for reference design parameters.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring minimal external component count and high reliability. The integrated fault protection reduces system complexity compared to discrete solutions. Suitable designs must accommodate the 700V breakdown voltage and 66 kHz switching frequency constraints. Evaluate thermal performance within the specified junction temperature limits during layout.

AC DC Converters, Offline Switchers Part Context

This part belongs to the LinkSwitch-TN family, which focuses on lowest component count and energy-efficient off-line switching. The series includes variants like LNK302, LNK304, and LNK306, differentiated by output current capabilities and feature sets such as auto-restart functionality.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official substitution lists for verified equivalents. Generic cross-references may not match the integrated topology or voltage ratings.

AC DC Converters, Offline Switchers FAQ

What converter topologies does the LNK305DN-TL support?

It supports buck, buck-boost, and flyback topologies.

Does the LNK305DN-TL include fault protection?

Yes, it features fully integrated auto-restart for short-circuit and open-loop fault protection.