DER-500 - 10 W TRIAC Dimmable, High Efficiency, Power Factor Corrected, Buck-Boost LED DriverThis engineering report describesa TRIAC dimmable, non-isolated buck-boost LED driver designed to drive a nominal LED voltage string of 38V at 260mA from an input voltage range of 90VACto 132 VAC. The LED driver utilizes the LYT3316Dfrom the LYTSwitch-3family of devices.The LYTswitch-3 is a TRIAC dimmable LED driver IC with a single stage PFC function and an accurate LED current control. The DER-500provides a single 10W TRIAC dimmable constant current output.The key design goals were high efficiency, low component temperature and excellent dimming compatibility.The document contains the power supply specification, schematic, bill of materials, transformer documentation, printed circuit layout, design spreadsheet and performancedata.
