本論文研製一高功因低諧波失真單級化一次側回授交流轉直流返馳式發光二極體驅動電路之準諧振控制晶片。一般常見的交流轉直流準諧振返馳式電源轉換器在高電壓輸入下切換頻率會提高，因此造成較高的切換損失以及較嚴重的電流諧波失真。為解決此問題，本文提出一限頻準諧振控制。相較於傳統控制，利用此控制方法，一次側開關達到波谷切換且限制了最高切換頻率，因此不僅提高系統效率，輸入電流更加追隨輸入電壓，使得功率因數及諧波失真表現有所提升。本控制晶片採用 TSMC 0.25 μm CMOS 高壓製程實現並將本控制晶片應用於一輸入電壓90~264 Vrms，輸出電壓為40 V，輸出定電流額定值600 mA/24W之發光二極體驅動電路以印證所提出之控制方法。實驗結果顯示相較於傳統臨界導通模式準諧振控制返馳式功率因數修正電路，利用所提出之控制晶片，電流諧波失真比例在低電壓輸入時由10.5% 減少為3.3%、高電壓輸入時由24%減少為6.2%，而此電路之最高系統效率為91.4%。

In this thesis, a primary-side quasi-resonant (QR) controller IC for single-stage flyback LED driver with high power factor (PF) and low total current harmonic distortion (THDi) is proposed. Conventionally, the flyback PFC converter with critical conduction mode QR control will suffer from higher switching loss and occur higher THDi at high line condition. To solve this problem, a frequency limit QR control is proposed and analyzed. By using the proposed control, the main switch of flyback converter is turned on with valley voltage switching and the maximum frequency is limited. So that the system efficiency is increased and the input current will follow the input voltage waveform better than that with the conventional control. Finally, this controller is fabricated with TSMC 0.25 μm CMOS high voltage mixed signal general purpose process and applied to an input voltage of 90~264 Vrms, output voltage of nominal 40 V, and constant output current of 600 mA/24W hardware prototype to verified the feasibility of the proposed control. The experimental result shows that the measured THDi is reduced from 10.5% to 3.3% at low line and 24% to 6.2% at high line compare to the critical conduction mode (CRM) QR flyback power factor correction (PFC) converter. The highest overall power efficiency is 91.4 %.

[1] P. C. Kinetics. (2010,February). Understanding LM-80, Lumen Maintenance, and LED Fixture Lifetime (1st¬ ed.) [Online].
Available: http://www.colorkinetics.com/support/whitepapers/LEDLifetime.pdf
[2] R. Mehta, D. Deshpande, K. Kulkarni, S. Sharma, and D. Divan, “LEDs-A Competitive Solution for General Lighting Applications,” in Energy 2030 Conference, 2008. ENERGY 2008. IEEE, pp. 1-5, Nov. 2008.
[3] R. L. Lin and Y. F. Chen,“Equivalent Circuit Model of Light-Emitting-Diode for System Analyses of Lighting Drivers,” in Industry Applications Society Annual Meeting, 2009. IAS 2009. IEEE, pp. 1-5, 2009.
[4] Limits for Harmonic Current Emissions, IEC 61000-3-2 Class C Standards, 2005.
[5] Y. Hu, L. Hubber, and M. M. Jovanović, “Single-Stage, Universal-Input AC/DC LED Driver with Current-Controlled Variable PFC Boost Inductor,” IEEE Trans. on Power Electronics, vol. 27, no. 3, pp. 1579-1588, Mar. 2012.
[6] T. J. Liang, S. C. Kang, C. A. Chen, R. L. Lin, and J. F. Chen, “Analysis and Design of Single-stage Electronic Ballast with Bridgeless PFC Configuration,” in IEEE, Proc. IECON'03, pp. 503-508, 2003.
[7] P. Y. Huang, C. S. Leu, W. C. Lin, and K. H. Liao, “LLC Converter with Taiwan Tech Coltage Doubler Rectifier (LLC-TVD) for Large-size LED-backlit LCD Display Applications,” in Future Energy Electronics Conference (IFEEC), 2013 1st International , pp. 618-622, 2013.
[8] T. H. Yu, T. J. Liang, K. H. Chen, J. S. Li, and J. S. Lee, “Design of an AC-DC and DC-DC Interleaved PWM Controller for Switching Power Supply,” in Energy Conversion Congress and Exposition (ECCE), 2013. IEEE, pp. 4172-4179, 2013.
[9] J. E. Park, J. W. Kim, B. H. Lee, and G. W. Moon, “Design on Topologies for High Efficiency Two-stage AC-DC Converter,” in Power Electronics and Motion Control Conference (IPEMC), 2012 7th International, pp. 257-262, 2012.
[10] C. J. Chang and C. L. Chen, “An Isolated Output-Feedback Scheme with Minimized Standby Power for SMPS,” IEEE Trans. on Power Electronics, vol. 28, no. 11, pp. 5140-5146, Nov. 2013.
[11] C. Adragna, “Design Equations of High-power-factor Flyback Converters Based on The L6561,” AN1059, STMicroelectronics, 2000.
[12] B. T. Irving and M. M. Jovanović, “Analysis and Design Optimization of Magnetic-Feedback Control Using Amplitude Modulation,” IEEE Trans. on Power Electronics, vol. 24, no. 2, pp. 426-433, Feb. 2009.
[13] B. Krause and J. Corbett, “Designing Switching Mode Converters with Modern Feedback Devices-It's Easy,” IEE Power Engineer, Feb. / Mar. 2005
[14] T. H. Chen, W. L. Lin, and C. M. Liaw, “Dynamic Modeling and Controller Design of Flyback Converter,” IEEE Trans. on Aerospace and Electronic Systems, vol. 35, no. 4, pp. 1230-1239, 1999.
[15] Y. Panov and M. M. Jovanović, “Small-signal Analysis and Control Design of Isolated Power Supplies with Optocoupler Feedback,” IEEE Trans. on Power Electronics, vol. 20, no. 4, pp. 823-832, Jul. 2009.
[16] J. S. Lai and D. Chen, “Design Consideration for Power Factor Correction Boost Converter Operating at The Boundary of Continuous Conduction Mode and Discontinuous Conduction Mode,” in Applied Power Electronics Conference and Exposition, 1993. APEC '93. Conference Proceedings 1993, Eighth Annual, pp. 267-273, 1993.
[17] “L6561 Power Factor Corrector Controller,”STMicroelectronics, 2003.
[18] “UCC28019 8-Pin CCM PFC Controller,”Texas Instruments, Dec. 2007.
[19] “TDA4863 Power Factor Controller IC for High Power Factor and Low THD,” Infineon Technologies, May 2003.
[20] X. Xie, J. Wang, C. Zhao, Q. Lu, and S. Liu, “A Novel Output Current Estimation and Regulation Circuit for Primary Side Controlled High Power Factor Single-stage Flyback LED Driver,” IEEE Trans. on Power Electronics, vol. 27, no. 11, pp. 4602–4612, Nov. 2012.
[21] Y. C. Li and C. L. Chen, “A Novel Primary-Side Regulation Scheme for Single-Stage High-Power-Factor AC–DC LED Driving Circuit,” IEEE Trans. on Industrial Electronics, vol. 60, no. 11, pp. 4978-4986, Nov. 2013.
[22] D. Gacio, J. M. Alonso, A. J. Calleja, J. Garcia, and M. Rico-Secades, “A Universal-Input Single-Stag2e High-Power-Factor Power Supply for HB-LEDs Based on Integrated Buck–Flyback Converter,” IEEE Trans. on Industrial Electronics, vol. 58, no. 2, pp. 4978-4986, Feb. 2011.
[23] P. L. Huang, D. Chen, C. J. Chen, and Y. M. Chen, “An Adaptive High-Precision Overpower Protection Scheme for Primary-Side Controlled Flyback Converters,” IEEE Trans. on Power Electronics, vol. 26, no.10, pp. 2817-2824, Oct. 2011.
[24] X. L. Chen, T. Y. Jiang, S. Y. Zhao, H. L. Zeng, and J. M. Zhang, “Evaluation of Primary Side Control Schemes for Flyback Converter with Constant Current Output,” in Applied Power Electronics Conference and Exposition (APEC), 2013 Twenty-Eighth Annual IEEE, pp. 1859-1863, 2013.
[25] K. W. Lee and T. J. Liang, Master Thesis, A High-Power-Factor Non-Electrolytic-Capacitor LED Driver, Department of Electrical Engineering, National Cheng-Kung University, Tainan, Taiwan
[26] J. M. Zhang, H. L. Zeng, and X. K. Wu, “An Adaptive Blanking Time Control Scheme for An Audible Noise-Free Quasi-Resonant Flyback Converter,” IEEE Trans. on Power Electronics, vol. 26, no.10, pp. 2735-2742, Oct. 2011.
[27] R. D. Stracquadaini, “Mixed Mode Control (Fixed off Time & Quasi Resonant) for Flyback Converter,” in IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society, pp. 556-561, 2010.
[28] K. Chen, C. C. Chiu, M. Lin, C. P. Yeh, J. M. Lin, and K. H. Chen, “Quasi-Resonant Control with Dynamic Frequency Selector and Constant Current Startup Technique for 92% Peak Efficiency and 85% Light-load Efficiency Flyback Converter,” IEEE Trans. on Power Electronics, early access, 2013.
[29] J. M. Cui, X. F. Yu, L. Wu, W. J. Xu, H. B. Qin, and L. H. Shao, “The Control-loop Design of Quasi-resonant Flyback Converter for HI-bright LED Driver,” in Electrical and Control Engineering (ICECE), 2011 International Conference, pp. 5045-5048, 2011.
[30] N. Mohan, T. M. Undeland, and W. P. Robbins, Power Electronics. John Wiley & Sons, Inc., 2013.
[31] J. Muhedthaler, J. Biela, J. W. Kolar, and A. Ecklebe, “Improved Core-Loss Calculation for Magnetic Components Employed in Power Electronic Systems,” IEEE Trans. on Power Electronics, vol. 27, no.2, pp. 964-973, Feb. 2012.
[32] Y. L. Xiong, S. Shan, H. W. Jia, P. Shea, and Z. J. Shen, “New Physical Insights on Power MOSFET Switching Losses,” IEEE Trans. on Power Electronics, vol. 24, no.2, pp. 525-531, Feb. 2009.
[33] G. C. Huang, T. J. Liang, and K. H. Chen, “Losses Analysis and Low Standby Losses Quasi-resonant Flyback Converter Design,” in Circuits and Systems (ISCAS), 2012 IEEE International Symposium, pp. 217-220, 2012.
[34] A. Imam and B. Antony, “Digitally Controlled Improved THD and Power Factor Single-stage Flyback LED Driver with Active Input-current Wave-shaping,” in Applied Power Electronics Conference and Exposition (APEC), 2013 Twenty-Eighth Annual IEEE, pp. 3338-3344, 2013.
[35] C. Adragna, “Primary-controlled High-PF Fflyback Converters Deliver Constant DC Output Current,” Via C. Olivetti, 2 Agrate Brianza (MB), Italy, STMicroelectronics
[36] Y. T. Lin and T. J. Liang, Master Thesis, IC Design of Primary-Side Control for Flyback Converter, Department of Electrical Engineering, National Cheng-Kung University, Tainan, Taiwan
[37] B. Razavi, Design of Analog CMOS Integrated Circuits, McGraw-Hill, 2001
[38] T. C. Carusone, D. Johns, and K. Martin, Analog Integrated Circuit Design, 2th ed. John Wiley & Sons. Inc. 2013.
[39] H. H. Chou, Y. S. Hwang, and J. J. Chen, “An Adaptive Output Current Estimation Circuit for a Primary-Side Controlled LED Driver,” IEEE Trans. on Power Electronics, vol. 28, no.10, pp. 4811-4819, Oct. 2013.
[40] T. Jiang, H. Zeng, J. Zhang, and Z. Qian, “A Primary Side Feedforward Control Scheme for Low Power LED Driver Compatible with Triac Dimmer,” in Applied Power Electronics Conference and Exposition (APEC), 2012 Twenty- Seventh Annual IEEE, pp. 963-968, 2012.
[41] J. Zhang, H. Zeng, and T. Jiang, “A Primary-Side Control Scheme for High-Power-Factor LED Driver With TRIAC Dimming Capability,” IEEE Trans. on Power Electronics, vol. 20, no. 4, pp. 4619-4626, Nov. 2012.
[42] C. Y. Hsu and H. Y. Wu, “A new single-phase active power filter with reduced energy-storage capacity,” Electric Power Applications, IEE Proceedings, vol. 143, no. 1, pp. 25-30, 1996.
[43] C. Wu and S. Y. R. Hui, “Elimination of an Electrolytic Capacitor in AC/DC Light-Emitting Diode (LED) Driver With High Input Power Factor and Constant Output Current,” IEEE Trans. on Power Electronics, vol. 27, no. 3, pp. 1598-1607, Mar. 2012.
[44] F. H. Zhang, J. J. Ni, and Y. J. Yu, “High Power Factor AC–DC LED Driver With Film Capacitors,” IEEE Trans. on Power Electronics, vol. 28, no. 10, pp. 4831-4840, Oct. 2013.
[45] M. Arias, D. G. Lamar, J. Sebastian, D. Balocco, and A. Diallo, “High-Efficiency LED Driver Without Electrolytic Capacitor for Street Lighting,” in Applied Power Electronics Conference and Exposition (APEC), 2012 Twenty- Seventh Annual IEEE, pp. 1224-1231, 2012.
[46] L. L. Gu, X. B. Ruan, M. Xu, and K. Yao, “Means of Eliminating Electrolytic Capacitor in AC/DC Power Supplies for LED Lighting,” IEEE Trans. on Power Electronics, vol. 24, no. 5, pp. 1399-1408, May. 2009.