LNK454DG

LED Driver IC Overview

The LNK454DG is a LinkSwitch-PL family IC designed for non-isolated, discontinuous flyback LED driver applications. It integrates a high-voltage power MOSFET with a controller to drive LED strings operating at 2.5 V to 3.5 V. The device provides a regulated output current of 366 mA and accepts an input voltage range of 85 VAC to 265 VAC. This component is evaluated using the RDK-268 reference design kit.

LED Driver IC Feature Summary

• Integrates a high-voltage power MOSFET with a proprietary controller in a single package
• Configured as a non-isolated discontinuous flyback converter
• Optimized for driving LED strings with constant current regulation

LED Driver IC Applications

• Non-isolated LED string drivers
• High-efficiency LED lighting circuits
• Evaluation of LinkSwitch-PL topology via RDK-268

LED Driver IC Procurement Notes

Verify component status carefully as this part may be discontinued. Confirm that the application strictly requires a non-isolated topology, as the LNK454DG is not suitable for isolated power supplies or general MCU logic power. Ensure the load consists of LEDs rather than constant current sources to maintain stability.

LED Driver IC Selection Notes

Select this component only for low-power, non-isolated LED applications requiring 366 mA output. It is unsuitable for powering microcontrollers or logic circuits; consider the LNK-TN family for such needs. Verify compatibility with the 85–265 VAC input range and ensure the design supports discontinuous conduction mode operation.

LED Driver IC Part Context

The LNK454DG belongs to the LinkSwitch-PL series from Power Integrations. These devices combine a high-voltage switched power MOSFET with a controller to simplify offline switcher design. The series targets low-power applications, reducing component count compared to discrete solutions.

LED Driver IC Replacement Considerations

For MCU or logic power supply requirements, the LNK-TN family is suggested as an alternative. No direct substitute part numbers are confirmed in public documentation.