LNK406LG

LED Driver IC Overview

The LNK406LG is a LinkSwitch-PH LED lighting driver IC from Power Integrations, designed for high-performance offline flyback converters. It integrates a 725 V power MOSFET with advanced control circuitry in an eSIP-7F-6 package. The device operates within 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 across a temperature range of -40°C to +150°C. This single-output controller provides precise regulation for LED applications without requiring optocouplers.

LED Driver IC Feature Summary

• Integrates a 725 V power MOSFET with primary-side regulation to eliminate optocouplers and secondary control circuitry.
• Features proprietary trimming technology for tight parameter tolerances and accurate output voltage and current regulation.
• Incorporates hysteretic thermal shutdown with automatic recovery to enhance reliability and reduce field returns.
• Utilizes frequency jittering to significantly reduce electromagnetic interference filter costs.

LED Driver IC Applications

• Isolated offline LED drivers
• Smart LED lighting systems
• High-voltage flyback post-regulation circuits

LED Driver IC Procurement Notes

Verify the specific suffix 'LG' against the manufacturer's latest datasheet to confirm pinout and marking consistency. Note that this component may be subject to end-of-life status or discontinuation; consult official obsolescence notices before finalizing designs. Ensure compliance with RoHS requirements and verify that the eSIP-7F-6 package matches your PCB footprint and thermal management strategy.

LED Driver IC Selection Notes

Select the LNK406LG for applications requiring high integration and simplified design by removing secondary side components. Its primary-side regulation capability makes it suitable for cost-sensitive LED lighting solutions where isolation feedback is traditionally used. Consider the 66 kHz operating frequency for transformer size optimization and the wide input voltage range for universal AC line compatibility.

LED Driver IC Part Context

The LNK406LG belongs to the LinkSwitch-PH family, which combines high-voltage power MOSFETs with intelligent controllers in low-pin-count packages. This series targets low-power offline converters, emphasizing ease of design and high reliability. As part of the broader LinkSwitch portfolio, it shares architectural similarities with other members while offering specific performance characteristics tailored for LED driver implementations.

LED Driver IC Replacement Considerations

No direct pin-to-pin replacement is publicly confirmed for the LNK406LG. Designers should evaluate alternative LinkSwitch-PH variants or the DPASwitch family if functional equivalence is required, though these may necessitate schematic and layout modifications due to differences in pinouts or internal parameters.