A New Circuit Design of AC/DC Converter for T8 LED Tube

This study is about an improved high-quality light-emitting diode (LED) converter for a T8 LED tube. The separated into the AC driving circuit and DC circuit. Also, tube was applied with output ripple eliminator optical performance. are assembled at end of in G13 base dummy, respectively, located on PCB. proposed founded SSBB (single-stage buck-boost) topology designed 10 W operation 600 mm light waveform measured by photosensor. had almost no same as straight line. average calculated percent flicker 1.9% 100 240 VAC, 50 60 Hz. has lower power efficiency than conventional 2.7% 100–240 but it still high (>87%). measurement results represent that current regulation below 0.92% VAC obtains factor more 0.84 total harmonic distortion less 14.3%. All harmonics reach IEC 61000-3-2 Class D standards converters.