LNK403LG

LED Driver IC Overview

The LNK403LG is a LinkSwitch-TN2 family IC integrating a high-voltage MOSFET and controller for offline flyback converters. It operates from 85 to 265 VAC input with a fixed 132 kHz switching frequency. The device supports up to 30 W output power, featuring programmable current limit, auto-restart fault protection, and thermal shutdown. It utilizes a DIP-7 package with extended creepage distance.

LED Driver IC Feature Summary

• Integrates high-voltage power switch and control logic in a single package
• Provides constant voltage and constant current regulation modes
• Includes built-in auto-restart protection for overload and short-circuit conditions

LED Driver IC Applications

• Adapters and chargers for mobile devices
• Standby power supplies for consumer electronics
• General-purpose isolated DC/DC converters

LED Driver IC Procurement Notes

Verify the specific suffix (e.g., LG) against the manufacturer's official datasheet to confirm pinout compatibility and packaging type. Ensure the component meets the required safety certifications for your target market before integration into final designs.

LED Driver IC Selection Notes

Select this part for low-power applications requiring minimal external components. Consider the fixed switching frequency when designing magnetics. Verify that the thermal performance of the DIP-7 package suits the enclosure constraints without additional heatsinking.

LED Driver IC Part Context

Part of the LinkSwitch-TN2 series designed for cost-sensitive, high-volume consumer applications. It replaces discrete solutions by combining power and control functions, reducing bill of materials and PCB area while maintaining efficiency standards for regulated power supplies.

LED Driver IC Replacement Considerations

LNK404DG offers higher power capability within the same family. LNK403DN provides an alternative package option. Verify electrical parameters and pinout compatibility before substituting.