簡易數學模型分析分段式LED驅動電路效率

簡易數學模型分析分段式LED驅動電路效率
2014/9  黃忠民,吳擇序,龔哲民,黃祺峻

摘要

    本文主要研究LED線性切換式電源架構，並建立一簡易數學模型分析分段式LED驅動電路效率，在多顆DC LED 及電晶體驅動架構下，LED 串接數隨時間呈正弦函數， 最高電源效率可達到98.1%，在4段HV LED驅動方式下，HV LED 電流隨時間呈正弦函數，電源效率可達到 86.2%，分析商用IC，透過開關切換串並聯，電源效率可達到 89.2%，展示此數學模型適用於分析多種電路架構下之效率分析。

關鍵詞：線性切換電源、高壓發光二極體、效率分析。

Abstract

This paper studies the LED linear switching power structure, and establish a simple mathematical model to analyze the efficiency of segmented LED driver circuit, in multiple satellites DC LED and transistor-driven architecture, LED series number of the sine function with time, the highest power efficiency up to 98.1%, in paragraph 4 HV LED drive mode, HV LED current with a sinusoidal function of time, power efficiency up to 86.2%, the analysis of commercial IC, through a series-parallel switch, power efficiency up to 89.2%, showing the mathematical model for the analysis of efficiency under a variety of circuit structure analysis.

Keywords: linear switching power, HV LED, efficiency analysis.

• Link:

http://tpece2014.ee.ntut.edu.tw/

• Conference papers (會議發表):

                 黃忠民,吳擇序,龔哲民,黃祺峻, 簡易數學模型分析分段式LED驅動電路效率 「台灣電力電子研討會暨展覽會」,(第十三屆),pp.51-54,20140904

• download:

paper pdf: https://drive.google.com/file/d/0B-Jg2ZDReoWudnBmWDNVUXk1bzQ/view?usp=sharing