Novel Pulsating-DC High-Voltage Linear Driving Scheme for GaN LED General Lighting

This work investigates a novel pulsating DC high-voltage linear driving scheme for GaN-based Light-emitting diode (GaN LED) general lighting to save costs and alleviate flicker. The superiority practicality of this in three-phase AC power grids were demonstrated the first time. Compared applications single-phase grids, GaN LEDs can provide superior performance lighting. component rectified voltage reaches 90.7%, which effectively alleviates flicker problem. In paper, we balanced LED efficiency by optimizing distribution multi-string while taking effects grid fluctuations into account. addition, constructed double-string system as modular prototype with scalability. experimental results exhibit high (~94% @380 V line voltage), factor (~0.952), flicker-free, reliability at very low cost (~$0.005/W).