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研究生： 陳逸凡
Chen, Yi-Fan
論文名稱： 發光二極體升壓型驅動電路之系統模型建構
System Modeling of Light-Emitting-Diode Boost Drivers
指導教授： 林瑞禮
Lin, Ray Lee
陳建富
Chen, Jiann-Fuh
學位類別： 碩士
Master
系所名稱： 電機資訊學院 - 電機工程學系
Department of Electrical Engineering
論文出版年： 2009
畢業學年度： 97
語文別： 英文
論文頁數： 147
中文關鍵詞： 發光二極體 、升壓型 、小訊號模型
外文關鍵詞： LED, Model, Boost, Light-Emitting-Diode
相關次數： 點閱：71  下載：5 
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    • 本論文擬分別建構單迴路控制與雙迴路控制之發光二極體升壓型驅動電路的系統模型，並推導及驗證各系統轉移函數。由於發光二極體驅動電路為達到較寬之調光範圍，會於不同的負載條件下，分別操作於連續導通模式與非連續導通模式。因此，本論文所建立之系統模型亦會分為連續導通與非連續導通兩種模式。
    為描繪發光二極體之電壓對電流的曲線，本文提出一分段線性模型，俾以準確地描述發光二極體操作在不同負載條件下之電壓對電流的特性。同時，經由此一模型推導發光二極體之等效直流與小訊號模型，並以實測波德圖驗證其正確性。
    藉由發光二極體、脈寬調變開關與控制架構的小訊號模型，可分別建立單迴路控制與雙迴路控制之發光二極體升壓型驅動電路的小訊號模型等效電路圖，藉此推導各系統轉移函數。接著利用數學運算軟體Mathcad繪製各轉移函數的波德圖曲線，與電路模擬軟體SIMPLIS之模擬結果相比較，俾以驗證所推導之轉移函數的正確性。
    最後，使用由PSM1735增益相位分析儀所建立之增益-相位量測平台，量測發光二極體升壓型驅動電路之雛型電路的各系統波德圖，驗證本論文所建立之系統模型與所推導之轉移函數。

    This thesis presents the system modeling of the light-emitting-diodes (LEDs) boost drivers with single-loop and dual-loop control, respectively. The system transfer functions have been derived from the corresponding equivalent circuit model for predicting the system performance, including control-to-output current gain, line regulation and load regulation. Due to the demand of wide dimming range, the LED boost driver operates in continuous conduction mode (CCM) and discontinuous conduction mode (DCM), which means that the modeling works have been also divided into two operating modes: CCM and DCM, respectively.
    In order to characterize the equivalent circuit model of the LEDs, a piece-wise linear model has been proposed to more accurately describe the electrical characteristics within the entire dimming range. According to the proposed piece-wise linear model, the equivalent DC and small-signal models have been derived and verified with the measured results of the LED sample.
    By applying the LED models, the three-terminal pulse-width modulation (PWM) switch models and the small-signal models for control scheme, the equivalent circuit models of the LED boost drivers have been constructed in CCM and DCM operation, respectively. Based on the built equivalent circuit models, the system transfer functions will be further derived to plot the system Bode diagrams by Mathcad for the comparison with those obtained by SIMPLIS simulations.
    Finally, the gain/phase measurement station has been built by using the gain/phase analyzer, PSM1735, to validate the derived system transfer functions.

    CHAPTER 1　INTRODUCTION 1 1.1 BACKGROUND 1 1.2 MOTIVATION 8 1.3 THESIS OUTLINE 9 CHAPTER 2　 EQUIVALENT CIRCUIT MODELS OF LEDS 10 2.1 INTRODUCTION 10 2.2 APPROXIMATE LINEAR MODEL 10 2.3 PIECE-WISE LINEAR MODEL 13 2.4 DC Model and Small-Signal Model 17 2.5 SUMMARY 23 CHAPTER 3　MODELING FOR SINGLE-LOOP CONTROLLED LED BOOST DRIVER 24 3.1 INTRODUCTION 24 3.2 EQUIVALENT AVERAGE AND SMALL-SIGNAL MODEL CIRCUITS 24 3.2.1 Continuous Conduction Mode 26 3.2.2 Discontinuous Conduction Mode 28 3.3 PREDICTIONS OF CCM SINGLE-LOOP CONTROLLED LED BOOST DRIVER 30 3.3.1 DC Analysis 30 3.3.2 Control-to-Output Current Gain 33 3.3.3 Line-to-Output Current Gain 36 3.3.4 Output Impedance 38 3.4 PREDICTIONS OF DCM SINGLE-LOOP CONTROLLED LED BOOST DRIVER 40 3.4.1 DC Analysis 40 3.4.2 Control-to-Output Current Gain 42 3.4.3 Line-to-Output Current Gain 45 3.4.4 Output Impedance 48 3.5 SUMMARY 51 CHAPTER 4　MODELING FOR DUAL-LOOP CONTROLLED LED BOOST DRIVER 52 4.1 INTRODUCTION 52 4.2 EQUIVALENT SMALL-SIGNAL MODEL CIRCUITS 52 4.2.1 Continuous Conduction Mode 52 4.2.2 Discontinuous Conduction Mode 55 4.3 PREDICTIONS OF CCM DUAL-LOOP CONTROLLED LED BOOST DRIVER 57 4.3.1 Outer Loop Gain 58 4.3.2 Line-to-Output Current Gain 65 4.3.3 Output Impedance 70 4.4 PREDICTIONS OF DCM DUAL-LOOP CONTROLLED LED BOOST DRIVER 75 4.4.1 Outer Loop Gain 75 4.4.2 Line-to-Output Current Gain 81 4.4.3 Output Impedance 86 4.5 SUMMARY 91 CHAPTER 5　EXPERIMENTAL VERIFICATIONS 92 5.1 INTRODUCTION 92 5.2 CCM DUAL-LOOP CONTROLLED LED BOOST DRIVER 92 5.3 DCM DUAL-LOOP CONTROLLED LED BOOST DRIVER 96 5.4 SUMMARY 99 CHAPTER 6　CONCLUSIONS AND FUTURE WORKS 100 REFERENCES 102 APPENDIX A MEASURED RESULTS OF LED SAMPLES 105 APPENDIX B　MATHCAD CALCULATION PROGRAMS 110 B.1 CALCULATION FOR TWO-PIECE LINEAR MODEL 110 B.2 CALCULATION FOR SIX-PIECE LINEAR MODEL 110 B.3 TRANSFER FUNCTIONS OF CCM SINGLE-LOOP CONTROLLED LED BOOST DRIVER 111 B.4 TRANSFER FUNCTIONS OF DCM SINGLE-LOOP CONTROLLED LED BOOST DRIVER 112 B.5 TRANSFER FUNCTIONS OF CCM DUAL-LOOP CONTROLLED LED BOOST DRIVER 114 B.6 TRANSFER FUNCTIONS OF DCM DUAL-LOOP CONTROLLED LED BOOST DRIVER 118 APPENDIX C SIMPLIS SIMULATION SCHEMATICS 122 C.1 SIMULATION SCHEMATICS OF CCM SINGLE-LOOP CONTROLLED LED BOOST DRIVER 122 C.2 SIMULATION SCHEMATICS OF DCM SINGLE-LOOP CONTROLLED LED BOOST DRIVER 123 C.3 SIMULATION SCHEMATICS OF CCM DUAL-LOOP CONTROLLED LED BOOST DRIVER 125 C.4 SIMULATION SCHEMATICS OF DCM DUAL-LOOP CONTROLLED LED BOOST DRIVER 131 APPENDIX D EXPERIMENTAL BODE DIAGRAMS 137 D.1 BODE DIAGRAMS OF LED SAMPLE D1 137 D.2 BODE DIAGRAMS OF DUAL-LOOP CONTROLLED LED BOOST DRIVER 143

    [1] R. N. Hall, G. E. Fenner, J. D. Kingsley, T. J. Soltys and R. O. Carlson, “Coherent light emission from GaAs junctions,” Physical Review Letters, vol. 9, no. 9, pp. 366-368, Nov. 1962.
    [2] Peter Baureis, “Compact modeling of electrical, thermal and optical LED behavior,” Proceedings of ESSDERC, pp. 145-148, 2005.
    [3] Design Notes, Single Inductor, Tiny buck-boost converter provides 95% efficiency in Lithium-lon to 3.3V applications, Mark Jordan, Linear Technology Corporation, 2002.
    [4] Jian Fang, Zhiping Lu, Zehong Li, Zhaoji Li, “A new flyback converter with primary side detection and peak current mode control,” IEEE Communications, Circuits and Systems, vol. 2, pp. 1707 – 1710, June 2002.
    [5] A. Fontan, S. Ollero, E. de la Cruz, J. Sebastian, ”Peak current mode control applied to the forward converter with active clamp,” Power Electronics Specialists Conference, vol. 1, pp. 45 – 51, May 1998.
    [6] Guisong Huang, Alpha J. Zhang, Yilei Gu, “LLC series resonant DC-to-DC converter,” U.S. Patent 6344979, 2001.
    [7] Ned Mohan, Tore M. Undeland, William P. Robbins, Power Electronics: Converters, Applications, and Design, John Wiley & Sons, Inc., pp. 164-183, 2003.
    [8] Muhammad H. Rashid, Power Electronics: Circuits, Devices, and Applications, Pearson Education, Inc., pp. 626-630, 2004.
    [9] Application Notes, Modeling, Analysis and compensation of the current-mode converter, Texas Instruments, Inc., 1999.
    [10] Heinz van der Broeck, Georg Saerlander, Matthias Wendt, “Power driver topologies and control schemes for LEDs,” IEEE Applied Power Electronics Conference, pp. 1319-1325, March 2007.
    [11] Hsieh, Chun-Yu Chen, Ke-Horng, “Boost DC-DC converter with charge-recycling (CR) and fast reference tracking (FRT) techniques for high-efficiency and low-cost LED driver,” IEEE Solid-State Circuits Conference, pp. 358-361, Sept. 2008.
    [12] Xiaoru Xu, Xiaobo Wu, “High dimming ratio LED driver with fast transient boost converter,” IEEE Power Electronics Specialists Conference, pp. 4192-4195, June 2008.
    [13] W. Hollinger, M. Punzenberger, “An asynchronous 1.8MHz DC/DC boost converter implemented in the current domain for cellular phone lighting management,” IEEE Solid-State Circuits Conference, pp. 528- 531, Sept. 2006.
    [14] Datasheets, “RT9292: Small package, high performance, asyn-boost converter for 6 white LEDs,” Richtek Technology Corporation, 2008.
    [15] Datasheets, “NCP5050: 4.5W flash white LED boost driver,” Semiconductor Components Industries, 2007.
    [16] Datasheets, “STLD40D: White LED power supply for large display backlight,” STMicroelectronics group of companies, Inc. 2006.
    [17] Adel S. Sedra, Kenneth C. Smith, Microelectronic Circuits, Oxford University Press, Inc., 2004.
    [18] Ray-Lee Lin, Piezoelectric Transformer Characterization and Application of Electric Ballast, Ph.D. Dissertation, Virginia Polytechnic Institute and State University, Nov. 2001.
    [19] Datasheets, “LNL-190UW-4H: SMD LED,” Jason, LIGHTOP Technology Co., 2007.
    [20] V. Vorperian, “Simplified analysis of PWM converters using model of PWM switch part I: continuous conduction mode,” IEEE Trans. on Power Electronics, vol. 26, no. 3, pp. 490-496, May 1990.
    [21] V. Vorperian, “Simplified analysis of PWM converters using model of PWM switch part II: discontinuous conduction mode,” IEEE Trans. on Power Electronics, vol. 26, no. 3, pp. 497-505, May 1990.
    [22] Datasheets, “RT9293: Small package, high performance, asyn-boost converter for 10 white LEDs,” Richtek Technology Corporation, 2008.
    [23] Raymond B. Ridley, A New Small-signal Model for Current-mode Control, Ph.D. Dissertation, Virginia Polytechnic Institute and State University, Nov. 1990.
    [24] B. Swaminathan, V. Ramanaratanan, “Application of Network Analyzer in Measuring the Performance Functions of Power Supply,” Indian Institute of Science, pp. 315-325, July-Aug. 2006.

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