2.5 W Non-isolated flyback converter

This engineering report describes a non-isolated flyback converter designed to provide a nominal output voltage of 5 V at 500 mA load from a wide input voltage range of 85 VAC to 265 VAC. This adapter utilizes the LNK3604D from the LinkSwitchTM-XT2 family of devices.

This document contains the power supply specification, schematic, bill of materials, transformer documentation, printed circuit layout, and performance data.

Summary and Features
· Lowest component count for a non-isolated flyback solution
· Output voltage regulation, ±5%
· Programmable current limit for clampless design
· Reduced dissipation during output short circuit fault
· · >75% Efficiency at full load condition
· >6 dB conducted EMI margin