DER-511 - 7 W TRIAC Dimmable, High Efficiency, Power Factor Corrected Non-Isolated Buck LED DriverThis engineering report describesa TRIAC dimmable, non-isolated buck LED driver designed to drive a nominal LED voltage string of 42V at 165mA from an input voltage range of 90VACto 132 VAC. The LED driver utilizes the LYT3315Dfrom the LYTSwitch-3family of devices.The LYTSwitch-3 is a TRIAC dimmable LED driver IC with a single-stage PFC function and accurate LED current control. The DER-511 provides a single 6.9W TRIAC dimmable constant current output.The key design goals were high efficiency to maximize efficacy, small PCB for compact size LED lamps and excellent dimming compatibility.The document contains the power supply specification, schematic, bill of materials, transformer documentation, printed circuit layout, design spreadsheet and performance data.
