A New High-Performance LED Converter With Separation of the AC and DC Driving Parts for a T8 LED Tube

This paper proposes a new high-performance light-emitting diode (LED) converter with separation of the AC and DC driving parts for a T8 LED tube. The proposed LED converter is mounted at the end of the LED tube in G13 base and G13 base dummy. The separation of the AC and DC driving parts enhances the light uniformity of the LED tube by securing the optical distance between the optic cover and light source. The AC driving part was designed to be inserted in a G13 base and was connected with the DC driving part through an LED module. The proposed LED converter is based on single-stage buck-boost topology and was designed for the operation at 19 W for a 1200 mm T8 LED tube. The proposed LED converter is very small and has fewer parts than other LED converters but still has high performance. The measurement results of the proposed LED converter show that the line regulation of the LED output current is less than 3.4% at 100-240 VAC and achieves high circuit efficiency (>89%), high power factor (>0.93), and low total harmonic distortion (<;9%). In addition, all the current harmonics of the converter meet the requirements of the IEC 61000-3-2 Class C standards for high-performance LED lighting applications.