研究生: |
許益捷 Yi-Chieh Hsu |
---|---|
論文名稱: |
具適應性電壓回授控制之高效率LED驅動器 High-Efficiency LED Driver with Adaptive Voltage Feedback Control |
指導教授: |
羅有綱
Yu-Kang Lo 劉邦榮 Pang-Jung Liu |
口試委員: |
鄭世仁
Shih-Jen Cheng 林忠義 Chung-Yi Lin 馬紅波 Hong-Po Ma |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電子工程系 Department of Electronic and Computer Engineering |
論文出版年: | 2013 |
畢業學年度: | 101 |
語文別: | 中文 |
論文頁數: | 56 |
中文關鍵詞: | LED驅動電路 、適應性控制 、最低電壓偵測器 、升壓型轉換器 |
外文關鍵詞: | LED driver, adaptive control, minimum voltage detector, boost converter |
相關次數: | 點閱:305 下載:2 |
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本論文旨在應用適應性控制於LED驅動電路。有別於傳統LED驅動電路,本論文採用適應性電壓回授控制技術,可動態調整直流-直流轉換器之輸出電壓。其核心概念為透過最低電壓偵測器配合適應性電壓回授控制電路,改變轉換器當中誤差放大器之參考電壓VREF,藉此調整其輸出電壓且降低線性電流調節電路之功率消耗。
本論文以TSMC 0.35 μm 2P4M CMOS製程來實現,晶片面積為1.173×1.146 mm2,轉換器採用升壓型,操作頻率為100 kHz,最大負載電流為200 mA。量測結果顯示,適應性電壓回授控制電路將會有效地降低功率消耗。
The purpose of this thesis is to apply the adaptive control technique into LED drivers. To compare the conventional LED driver, we adopt adaptive voltage feedback control technique, which can dynamically adjust the output voltage of the dc-dc converter. Its main concept is to tune the error amplifier's reference voltage of dc-dc converter with the minimum voltage detector and adaptive voltage feedback controller. As a result, the output voltage of the dc-dc converter is adjusted to reduce the power consumption of linear current regulators.
The chip is implemented with TSMC 0.35 μm 2P4M CMOS process, and its size is 1.240×0.849 mm2. A boost converter is used, and the operating frequency and the maximum load current are 100 kHz and 200 mA, respectively. Experimental results show that the adaptive voltage feedback controller can effectively reduce the power dissipation on linear current regulator.
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