具適應性驅動電壓與低功耗控制技術之小面積高效率RGB-LED驅動器

Area-Saving and High Efficiency RGB-LED Driver with Adaptive Driving Voltage and Energy-Saving Control Technique

許益捷(Yi-Chieh Hsu)

指導教授 ： 陳中平

國立臺灣大學/電機資訊學院/電子工程學研究所/博士(2019年)

https://doi.org/10.6342/NTU201900665

摘要

本篇論文提出一個小面積高效率且具有適應性驅動電壓與低功耗控制技術之RGB-LED驅動器。為了要獲得適當的驅動電壓，我們提出了適應性驅動電壓及低功耗控制電路，此電路主要是透過追蹤升壓型轉換器之參考電壓進一步獲得較為適當的驅動電壓。因此，我們可藉由降低線性電流調整電路的損耗使得整體系統的效率獲得提升，實現低功耗與高效率的設計目標。除此之外，我們也提出了切換式線性電流調節電路，藉由元件共用的概念以減少晶片使用面積，與傳統的線性調節電路相比，約可減少10%的面積，實現小面積的設計目標。本篇論文之晶片係採用TSMC 0.35 µm 2P4M CMOS製程實現，晶片有效面積約為0.3 mm2，最大驅動電流以及操作頻率分別為200 mA與100 kHz。經由實驗結果可得知本篇論文所提出的具適應性驅動電壓與低功耗控制技術之RGB-LED驅動器，相較於傳統固定驅動電壓之LED驅動電路，功率損耗可減少約58%。

關鍵字

LED驅動器 ； 適應性驅動電壓與低功耗控制技術 ； 升壓型轉換器

並列摘要

The red-green-blue light-emitting diode (RGBLED) driver with adaptive driving voltage and energy-saving (ADVE) technique is presented in this paper. To obtain the proper driving voltage, an ADVE control circuit is proposed. This approach tracks the reference voltage of a boost converter to achieve the appropriate output voltage of the boost converter. Hence, the power loss of the linear current regulator is reduced to improve the efficiency of whole system. Moreover, the occupied area of the linear current regulator is saved about 10% by the proposed switching linear current regulator. This chip was fabricated using TSMC 0.35 µm 2P4M complementary metal-oxide-semiconductor (CMOS) technology. The active chip area is 0.3 mm2. The maximum driving current and operating frequency are 200 mA and 100 kHz, respectively. Compared with a conventional LED driver with fixed output voltage, the experimental results demonstrate that the power loss of the proposed LED driver with ADVE technique is reduced by over 58%.

並列關鍵字

LED driver ； Adaptive driving voltage and energy-saving control technique ； Boost converter

參考文獻

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