DER-422 - 8 W Power Factor Corrected (Valley Fill) Non- Dimmable Isolated Flyback, Constant Voltage LED DriverThis document is an engineering report describing 8 W power supply utilizing a LYTSwitch-2 LYT2005E. This power supply was designed for LED ballast application and may be used also as a general evaluation platform for other applications. The power supply has a constant voltage (CV) and constant current (CC) characteristic, making it ideal for configurable load or application. The LYTSwitch-2 provides a sophisticated range of protection features including auto-restart for control loop component open/short circuit, over voltage protection and output short-circuit conditions. Accurate hysteretic thermal shutdown ensures safe average PCB temperatures under all conditions. The IC package provides extended creepage distance between high and low voltage pins (both at the package and the PCB), which even in high humidity environment help prevents arcing which increases reliability. The EE16 transformer bobbin in this design includes extended creepage distance to meet safety spacing requirements. The document contains the power supply specification, schematic, bill of materials, transformer documentation, printed circuit layout, and performance data.
