LNK457DG-TL

LED Driver IC Overview

The LNK457DG-TL is an AC/DC offline switcher from the LinkSwitch-III family, designed for LED lighting applications. It integrates a 700 V power MOSFET and operates at a switching frequency of 132 kHz. The device supports TRIAC dimming and includes single-stage Power Factor Correction (PFC). It delivers a constant current output with a maximum drain current capability of 1 A. The component functions within an input voltage range of 85 to 265 VAC and features an operating temperature range from -40°C to +150°C.

LED Driver IC Feature Summary

• Integrates TRIAC dimming compatibility for leading-edge control
• Includes single-stage Power Factor Correction (PFC) circuitry
• Provides constant current regulation for LED loads
• Features high-voltage integrated power MOSFET

LED Driver IC Applications

• TRIAC-dimmable LED lighting systems
• Single-stage PFC LED drivers
• Offline AC/DC conversion for general illumination

LED Driver IC Procurement Notes

Verify the specific suffix 'TL' indicates tape-and-reel packaging when ordering. Confirm that the SO-8C package variant matches your PCB footprint requirements. Ensure the design accounts for the 132 kHz switching frequency regarding thermal management and EMI filtering. Cross-reference the datasheet for latest revision notes before finalizing procurement specifications.

LED Driver IC Selection Notes

Select this component for designs requiring integrated TRIAC dimming without external controllers. The single-stage PFC architecture reduces component count compared to two-stage solutions. Consider the 1 A current limit when sizing the transformer and output stage. Verify compatibility with the target dimmer switches for reliable operation across the full dimming range.

LED Driver IC Part Context

This part belongs to the LinkSwitch-III family from Power Integrations. It succeeds earlier generations by offering higher integration levels for LED applications. The series focuses on reducing bill-of-materials cost through monolithic integration of control, protection, and power stages in a compact SO-8C package.

LED Driver IC Replacement Considerations

Check for updated revisions within the same LinkSwitch-III family. Verify pinout compatibility if substituting with other LNK4xx variants. Ensure thermal performance meets requirements as newer revisions may have slight parameter shifts.