DER-328: 280mA @ 36V, 90 ~ 132 VAC in

This document is an engineering report describing a non-isolated LED driver (power supply) utilizing a LNK460KG from the LinkSwitch-PL family of devices. The DER-328 provides a single 10 W dimmable constant current output.

The key design goals were high efficiency and small size. This allowed the driver to fit into A19 sized lamps and be as close to a production design as possible.

The board was optimized to operate with U.S. leading-edge TRIAC dimmers over an AC input voltage range of 90 VAC to 132 VAC, 60 Hz. LinkSwitch-PL IC based designs provide a high power factor (>0.95).

The form factor of the board was chosen to meet the requirements for standard A19 LED replacement lamps. The output is non-isolated and requires the mechanical design of the enclosure to isolate the output of the supply and the LED load from the user.

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