LNK354PN

AC DC Converters, Offline Switchers Overview

The LNK354PN is an offline switcher from the LinkSwitch-HF family, designed for flyback converter topologies. It integrates a high-voltage power MOSFET with a control circuit in an 8-pin DIP-B package. The device supports a maximum supply voltage of 700V and operates within a temperature range of -40°C to +150°C TJ. Key electrical parameters include a drain-source on-resistance of 45Ω, a maximum operating current of 750mA, and a rated output power capability of 5W. The switching frequency is fixed at 200kHz, and it features internal cycle-by-cycle current limiting.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage power MOSFET with a proprietary control IC for simplified design
• Includes comprehensive protection mechanisms such as over-temperature shutdown, open-loop detection, and short-circuit protection
• Utilizes a fixed 200kHz switching frequency to minimize external component count
• Features a robust 8-pin through-hole DIP-B package suitable for high-reliability applications

AC DC Converters, Offline Switchers Applications

• Offline AC/DC converters
• Battery chargers
• General-purpose power supplies

AC DC Converters, Offline Switchers Procurement Notes

Verify the exact suffix 'PN' corresponds to the 8-pin DIP-B through-hole package configuration. Confirm that the 5W power rating aligns with your specific thermal design and input voltage conditions. Check for end-of-life status or alternative recommendations from Power Integrations due to potential product lifecycle changes.

AC DC Converters, Offline Switchers Selection Notes

Select this component for low-power offline applications requiring high reliability and minimal external parts. Ensure the 700V breakdown voltage meets the peak drain stress requirements of your transformer design. Verify that the 45Ω Rds(on) allows for acceptable conduction losses within your thermal budget.

AC DC Converters, Offline Switchers Part Context

The LNK354PN belongs to the LinkSwitch-HF family, which targets high-frequency, low-cost offline power supply designs. This series is characterized by its integration of the power switch and controller into a single monolithic chip, reducing board space and assembly complexity compared to discrete solutions.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official Power Integrations documentation for direct pin-compatible replacements or updated family members if this part is discontinued. Generic cross-references may not match the integrated control logic or voltage ratings.