DER-512 - 18 W TRIAC Dimmable, High Efficiency, Power Factor Corrected, Non-Isolated Buck-Boost LED Driver This engineering report describesa TRIAC dimmable, non-isolated buck-boostLED driver designed to drive a nominal LED voltage string of 72Vat 260mA from an input voltage range of 90VAC to 132VAC. The LED driver utilizes theLYT3318Dfrom the LYTSwitch-3family of devices.LYTSwitch-3 is a family of devices which are designed especially for TRIAC dimmable LED drivers witha single stage PFC function and accurate LED current control. DER-512isa single stage 18.72W TRIAC dimmable LED driver with constant current output.Key design goals were high efficiency, compactPCBand excellent dimmingcompatibility. The design is intended for bulbLED applications.Thisdocument contains the power supply specification, schematic, bill of materials,transformer documentation, printed circuit layout,design spreadsheet and performancedata.
