LNK420LG

LED Driver IC Overview

The LNK420LG is a LinkSwitch-PH LED lighting driver IC from Power Integrations, designed for offline flyback converters. It integrates a high-voltage power MOSFET and controller in an eSIP-7F-6 package. The device operates with an input voltage range of 90 VAC to 265 VAC and features a fixed switching frequency of 66 kHz. It supports through-hole mounting and functions within a temperature range of -40°C to +150°C.

LED Driver IC Feature Summary

• Integrates high-voltage power MOSFET and controller in a single low-pin-count package
• Eliminates the need for optocouplers and complex compensation circuits
• Includes proprietary cycle-by-cycle current limiting and thermal shutdown protection

LED Driver IC Applications

• LED lighting drivers
• Offline flyback power supplies

LED Driver IC Procurement Notes

Verify component authenticity via manufacturer channels due to end-of-life status. Confirm RoHS compliance details before integration. Check for obsolescence notices as the manufacturer may discontinue production. Validate pinout compatibility with existing PCB layouts. Ensure supply chain stability given potential availability constraints.

LED Driver IC Selection Notes

Select this component for cost-sensitive LED applications requiring high integration. Suitable for designs needing isolation without optocouplers. Ideal for space-constrained boards using through-hole SIP packages. Consider thermal management requirements for operation up to 150°C junction temperature.

LED Driver IC Part Context

Part of the LinkSwitch-PH family, which combines power switching and control logic. Designed to reduce external component count compared to discrete solutions. Targets general-purpose offline power conversion needs with simplified design workflows.

LED Driver IC Replacement Considerations

LNK420EG is listed as a related product. Verify functional equivalence and pin compatibility before substitution. Review datasheet differences for electrical parameter variations.