DER-286: 1A @ 33V Max, 90 ~ 308VAC in

This document describes an isolated, power factor corrected, very high efficiency LED driver designed to drive an LED string of 30 V at a current of 1 A (both nominal) from an input voltage range of 90 VAC to 308 VAC.

The LED driver uses a LNK419EG device from the LinkSwitch-PH family of ICs. This integrated controller and 725 V MOSFET dramatically reduces the complexity and component count of the solution.

The key design goals were to achieve the highest possible efficiency, to pass >2.5 kV, 1.2 µs / 50 µs differential surge, and meet IEC 61000-3-2 Class C harmonics.

This document contains the LED driver specification, schematic, bill of material, transformer documentation, and typical performance characteristics.