LNK403EG

LED Driver IC Overview

The LNK403EG is a LinkSwitch-TN2 family integrated switcher IC designed for high-efficiency, low-component-count AC-DC power supplies. It integrates a 700 V Power MOSFET, high-voltage switched current source, oscillator, high-voltage CMOS logic, thermal shutdown, and frequency jittering. The device operates from universal line voltages (85 to 265 VAC) and supports output currents up to 330 mA with an output voltage of 21 V in typical LED driver applications.

LED Driver IC Feature Summary

• Integrates a 700 V Power MOSFET with high-voltage startup circuitry for simplified design.
• Features proprietary Constant On-Time (COT) control mode for fast transient response and low standby power.
• Includes comprehensive protection mechanisms such as cycle-by-cycle current limiting, thermal shutdown, and open-loop detection.

LED Driver IC Applications

• LED lighting drivers
• General-purpose isolated power supplies
• Adapters and chargers

LED Driver IC Procurement Notes

Verify the specific suffix code against official datasheets to confirm pinout and package variations. Confirm RoHS compliance status through manufacturer documentation prior to integration. Ensure ESD handling protocols are followed during assembly. Validate component authenticity via authorized distribution channels.

LED Driver IC Selection Notes

Select this component for designs requiring minimal external parts count and high reliability. Suitable for applications where board space is constrained and efficiency standards must be met without complex feedback loops. Evaluate thermal performance based on expected load conditions.

LED Driver IC Part Context

Part of the LinkSwitch-TN2 family, which targets cost-sensitive, high-volume consumer electronics. This series emphasizes ease of design-in by eliminating optocouplers and secondary-side regulation components, relying on primary-side sensing techniques.

LED Driver IC Replacement Considerations

Check for direct cross-references within the LinkSwitch-TN2 family or updated revisions. Verify pin compatibility and electrical parameters before substituting with other manufacturers' flyback controllers.