Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/78736
Title: LED driver design using GaN device
Authors: Zang, Qibang
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2019
Abstract: The widely used LED lighting driver is series resonant (SR) converter or parallel resonant (PR) converter, which has a simple and understandable topology. The efficiency of conventional LED lighting in the market is around 90% to 92%. In this dissertation, an improved design with high efficiency reaching up to 97% to 98% based on traditional topology is proposed. Gallium Nitride (GaN) devices instead of standard MOSFETs are used in this novel design, in order to achieve a higher frequency operation up to 1 MHz with less performance loss for the switched mode power supply design. Additionally, magnetic size is reduced significantly by operating the converter at higher frequencies, which is better for applications in very limited space with small form factors. However, hard switching is no longer able to achieve satisfied performance under high frequency operation, hence soft switching is applied in the circuit design instead. This thesis details the design of a digitally controlled and credit card size LED lighting driver. This LED converter is converting from 380 VDC to 300 VDC to drive the new outdoor lighting with high efficiency, designed to work for constant current output (500 mADC) for LED lighting for commercial applications using GaN devices. The LED driver will also feature DALI communication protocol for remote monitoring and control.
URI: http://hdl.handle.net/10356/78736
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:EEE Theses

Files in This Item:
File Description SizeFormat 
Dissertation(MSc)_ZangQibang.pdf
  Restricted Access
main article2.4 MBAdobe PDFView/Open

Google ScholarTM

Check

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.