LNK457KG

LED Driver IC Overview

The LNK457KG is an LED lighting driver IC from the LinkSwitch-PL series by Power Integrations. It integrates a high-voltage power switch and controller for offline flyback converters. The device supports TRIAC dimming functionality and is designed for applications requiring up to 11.5 W output power with an input voltage range of 85 VAC to 265 VAC. It utilizes an eSOP-12 package for surface mount installation.

LED Driver IC Feature Summary

• Integrates TRIAC dimming capability for compatibility with leading-edge and trailing-edge dimmers
• Combines high-voltage power switch and control circuitry in a single compact package
• Supports constant current and constant voltage regulation modes for LED loads

LED Driver IC Applications

• TRIAC-dimmable LED lighting fixtures
• Offline AC/DC LED drivers
• Compact LED lamp designs

LED Driver IC Procurement Notes

Verify component status as the LNK457KG may be subject to discontinuation or limited availability. Confirm RoHS compliance and moisture sensitivity levels prior to procurement. Review official datasheets for specific ordering suffixes and packaging details to ensure compatibility with manufacturing processes.

LED Driver IC Selection Notes

Select this component for low-power LED applications requiring integrated dimming support. Ensure the design accommodates the eSOP-12 package constraints. Verify that the required output power does not exceed the 11.5 W limit. Consider thermal management requirements for the enclosed power switch within the specified operating temperature range.

LED Driver IC Part Context

The LNK457KG belongs to the LinkSwitch-PL family, which targets cost-sensitive LED lighting applications. This series emphasizes high integration to reduce external component count. It serves as a solution for replacing discrete controller and MOSFET combinations in simple flyback topologies.

LED Driver IC Replacement Considerations

Check for direct substitutes within the LinkSwitch-PL series such as the LNK456KG or LNK459KG based on pinout and power rating compatibility. Verify functional equivalence regarding dimming characteristics and package type before substitution.