LNK405LG

LED Driver IC Overview

The LNK405LG is an obsolete LinkSwitch-PH LED driver IC from Power Integrations, designed for offline flyback converters. It integrates a high-voltage power switch and control circuitry in an eSIP-7F-6 package. The device supports an input voltage range of 90 VAC to 265 VAC and operates at a fixed switching frequency of 66 kHz. It provides one output channel with a maximum operating temperature of +150°C and a minimum of -40°C. The component is classified as an LED lighting driver IC.

LED Driver IC Feature Summary

• Integrates high-voltage power switch and control logic for compact design
• Fixed frequency operation for simplified EMI filtering
• High thermal stability suitable for demanding environments

LED Driver IC Applications

• LED lighting drivers
• Offline flyback converters
• General-purpose isolated power supplies

LED Driver IC Procurement Notes

Verify current availability status carefully, as the LNK405LG is officially listed as obsolete and no longer manufactured by Power Integrations. Sourcing may only be possible through third-party distributors holding remaining stock or via authorized substitute components. Confirm RoHS compliance details and specific marking variations against the official datasheet before finalizing any procurement decisions.

LED Driver IC Selection Notes

Select this component only if legacy compatibility is required, as it has been superseded by newer generations. Evaluate alternative LinkSwitch-PH variants that offer active status and updated packaging options. Ensure the eSIP-7F-6 package fits the target PCB layout constraints. Consider thermal management requirements given the high junction temperature capability and integrated switch design.

LED Driver IC Part Context

The LNK405LG belongs to the LinkSwitch-PH family, which combines a 700V MOSFET with a controller in a single package. This series targets cost-sensitive AC/DC conversion applications. The 'LG' suffix typically denotes specific pinout or packaging variations within the broader LNK4x product line, distinguishing it from other LinkSwitch families like LinkSwitch-II or LinkSwitch-TN.

LED Driver IC Replacement Considerations

Official substitutes include parametric equivalents from the same LinkSwitch-PH family. Check manufacturer documentation for direct pin-compatible replacements that maintain active manufacturing status. Verify electrical parameters such as breakdown voltage and switching frequency match the original design requirements.