This engineering report describes a buck converter power supply designed to provide a
nominal output voltage of 5 V at 35 mA load from a wide input voltage range of 85 VAC
to 265 VAC. It utilizes the LNK3202D from the LinkSwitchTM-TN2 family of devices.
The LinkSwitch-TN2 ICs are specifically designed to replace all linear and capacitor-fed
(cap dropper) non-isolated power supplies in the under 360 mA output current range at
equal system cost while offering much higher performance and energy efficiency.
The DER-507 provides a single 5 V buck output. The key design goal is a low cost
solution intended for adapter applications.
The document contains the power supply specification, schematic, bill of materials,
transformer documentation, printed circuit layout, performance and test data.