LNK457DG

LED Driver IC Overview

The LNK457DG is a LinkSwitch-PL series LED driver IC designed for compact, non-isolated offline power supplies. It integrates a high-voltage switch and controller to support single-stage power factor correction (PFC). The device operates from an input voltage range of 85 VAC to 265 VAC with a maximum output current of 1 A. It functions within a switching frequency range of 25.8 kHz to 134 kHz and supports operation temperatures from -40°C to +150°C. Packaged in an SO-8C format, it provides constant current regulation for LED applications.

LED Driver IC Feature Summary

• Integrates single-stage power factor correction capability
• Supports flicker-free TRIAC dimming functionality
• Enables compact non-isolated power supply designs

LED Driver IC Applications

• Offline LED lighting drivers
• Compact non-isolated power supplies
• TRIAC dimmable LED fixtures

LED Driver IC Procurement Notes

Verify component status as the LNK457DG-TL variant is listed as End-of-Life. Confirm availability through authorized distributors or secondary markets. Ensure design-in decisions account for potential supply constraints associated with discontinued part numbers.

LED Driver IC Selection Notes

Select this component for low-power, non-isolated LED applications requiring integrated PFC and dimming control. Consider the SO-8C package constraints and thermal limits when designing for high ambient temperatures. Validate compatibility with specific TRIAC dimmer types to ensure flicker-free performance.

LED Driver IC Part Context

The LNK457DG belongs to the LinkSwitch-PL family from Power Integrations. This series combines precision controllers with high-voltage MOSFETs in low-pin-count packages. It targets cost-sensitive, space-constrained AC-DC conversion needs without requiring optocouplers or secondary-side feedback loops.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.