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研究生:林冠宇
研究生(外文):Kuan-Yu Lin
論文名稱:多模控制返馳式轉換器之類比補償器設計
論文名稱(外文):Analog Compensator Design for aMulti-Mode Controlled Flyback Converter
指導教授:陳德玉
指導教授(外文):Dan Chen
口試委員:陳耀銘陳景然邱煌仁
口試委員(外文):Yao-Ming ChenChing-Jan ChenHuang-Jen Chiu
口試日期:2015-06-30
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:電機工程學研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2015
畢業學年度:103
語文別:英文
論文頁數:90
中文關鍵詞:返馳式電源轉換器多模控制補償器設計通用串列匯流排電力傳輸
外文關鍵詞:Flyback ConverterMulti-Mode ControlCompensator DesignUSB Power-Delivery
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  多年以來,返馳式電源轉換器在電力電子之應用上,一直是受歡迎的電路架構。近年一種可改善電腦電源供應器電路整體效率之“多模控制”方法,已提出且應用於返馳式電源轉換器上。“多模式控制針對電路不同的負載強度,提供不同的控制策略。當電路操作於重載時,電路運作於準諧振模式。當負載減輕時則採用固定切換頻率之不連續導通模式。而當電路運作於輕載,例如電腦的待機睡眠模式時,則採用頻率返折模式。如此電路整體效率即可獲得提升。
  本論文針對多模式控制返馳式電源轉換器之回授特性,使用小訊號模型做分析。由於同一組補償器線路將使用在三種不同的控制模式上,本論文也針對了三種控制模式之環增益頻寬以及確保系統穩定度之相位邊限作分析。基於上述分析,可發展出一套補償器設計流程。此流程亦將以模擬結果作證實。此外,此補償器設計流程也將衍伸至“通用串列匯流排電力傳輸之應用,是為即將誕生於電子產品充電應用上之新技術。本論文之分析,也為此類應用提供了有效的資訊。

Flyback converter configuration has been a popular choice for many power electronic applications for many years. Recently, a so-called multi-mode control (MMC) scheme has been reported to improve the overall performances for applications requiring wide line voltage and wide load range such as the computer power systems. The idea of MMC is to provide different control strategies according to the load level. When the load is heavy, quasi-resonant (QR) control mode is used. When the load is reduced, a discontinuous conduction mode (DCM) is used. When the load is very light such as in the computer sleeping mode, frequency-foldback mode (FFM) is used. This way, the converter overall efficiency can be improved.
In this thesis, the feedback behavior of the MMC flyback converter will be analyzed using the small-signal model. Since one compensator is used for the three different modes of control, an analysis is given for the control loop gain bandwidth and stability margin for each mode. Based on this analysis, a design procedure is developed for the feedback compensator design. Simulations are conducted to verify the theoretical results. The procedure is also extended to the so-called USB-PD (Universal Serial-Bus Power Delivery) power that is an up-and-coming household DC converter application for charging mobile devices. For the USB-PD applications, the converter output voltage contains three different voltage levels. The results obtained from this thesis provide useful information for such applications.

誌謝 i
摘要 ii
Abstract iii
Table of Contents v
List of Figures vii
List of Tables ix
Chapter 1 Introduction 1
1.1 Background 1
1.2 Motivation of the Thesis 2
1.3 Thesis Organization 3
Chapter 2 Description of a Multi-Mode-Controlled Flyback Converter 5
2.1 QR Mode Operation 6
2.2 DCM Operation 9
2.3 FFM Operation 10
Chapter 3 Small-Signal Modeling of Multi-Mode-Controlled Flyback Converter 13
3.1 Open-Loop Control-to-Output Gvc(s) for Different Modes of Operation 15
3.1.1 FFM Operation 15
3.1.2 DCM Operation 15
3.1.3 QR Mode Operation 15
3.2 Verification Results of Models with SIMPLIS Simulation 19
3.3 Comments on Gvc(s) of Different Modes of Operation 23
Chapter 4 Compensator Design for a Multi-Mode-Controlled Flyback Converter 24
4.1 Functional Dependency of fBW on Modes of Operation 25
4.2 Determination of the Compensator Transfer Fucntion Hv 28
4.2.1 Determination of Compensator Pole-Zero Locations 28
4.2.2 Compensator Zero Adjustment 29
4.2.3 Change of fp,comp Location Due to Compensator Parasitic 31
4.2.4 Determination of Compensator Component Values 32
4.3 Flow-Chart of Compensator Design for MMC Flyback Converter 33
4.4 Compensator Design Example I: by Simulation 35
4.5 Compensator Design Example II: by Experimental Measurements 38
Chapter 5 Constant-Bandwidth Compensator Design 46
5.1 Constant-Bandwidth Compensation 46
5.2 The Constants to Make Equal Bandwidth for MMC Operation 47
5.3 Circuit Implementation of the Constant-Bandwidth Compensation Scheme 49
5.4 SIMPLIS Simulation Results 50
Chapter 6 Multi-Mode-Controlled Flyback Converters for USB-PD Applications 52
6.1 Mode Operating Region as a Function of Output Voltage 53
6.2 Compensator Design of MMC Flyback in USB-PD Applications 57
6.2.1 Case A: If DCM Region Exists Under Vo,min 58
6.2.2 Case B: If DCM Region Does Not Exist Under Vo,min 58
6.2.3 Case C: Only FFM Region Exists Under Vo,min 59
6.3 Flow-Chart of Compensator Design in USB-PD Applications 60
6.4 Design Examples 61
6.4.1 Example for Case A 62
6.4.2 Example for Case B 67
6.4.3 Example for Case C 73
Chapter 7 Conclusions and Suggested Future Research Topics 80
7.1 Conclusions 80
7.2 Suggested Future Research Topics 81
References 82
Appendix A Derivation of the Equations fc in Gvc Transfer Functions in (4.1), (4.2), (4.3), (6.7), (6.8) and (6.9) 84
Appendix B Derivation of the Equations Related to the MMC Operation Profile from (6.2) to (6.5) 87
Vita 90


[1] “Philips Semiconductor TEA1654 datasheet, ” Philips Semiconductor, Dec 2000.
[2] “Texas Instruments UCC28600 datasheet,” Texas Instruments, Nov 2005.
[3] “Texas Instruments LM5023 datasheet,” Texas Instruments, Apr 2013.
[4] “On semiconductor AND8145 application notes,” On semiconductor, March 2004.
[5] Hong Huang, “Maximizing AC/DC efficiency from full-load to no-load,” Texas Instruments, Nov 2007.
[6] Laszlo Huber, Milan M. Jovanovic, “Small-signal analysis of DCM Flyback converter in frequency-foldback mode of operation,” IEEE Applied Power Electronics Conference and Exposition (APEC) , vol. 26, pp. 1746-1752, March 2013.
[7] V. Vorperian, “Simplified analysis of PWM converters using model of PWM switch II Discontinuous conduction mode,” IEEE Transactions Aerospace and Electronic Systems, vol. 26, pp. 497-505, May 1990.
[8] Milan M. Jovanovic, Laszlo Huber, Yuri Panov, “Principles of converter control,” Delta Power Electronics R & D Laboratory, Nov 2002.
[9] Christophe Basso, “A small-signal analysis of the current-mode borderline conduction mode PWM switch model,” ON Semiconductor.
[10] Christophe Basso, “The TL431 in Switch-Mode Power Supplies loops: part II,” ON Semiconductor. 14, rue Paul Mesplé – BP53512 - 31035 TOULOUSE Cedex 1 – France
[11] Yuri Panov, Milan Jovanivic, “Small-Signal Analysis and Control Design of Isolated Power Supplies with Opto-coupler Feedback,” IEEE Applied Power Electronics Conference and Exposition (APEC), vol. 2, pp. 777-785, 2004.
[12] “AN017 application note, Feedback Control Design of Off-line Flyback Converter,” Edwin Wang, Richtek Technology, Jun 2014.
[13] “TL431 programmable shunt regulator,” Fairchild Semiconductor.
[14] “UCC28600 120W Evaluation Module,” Texas Instruments, Oct 2006.
[15] “USB Power Delivery,” http://www.usb.org/developers/powerdelivery/
[16] “Overview for USB Power Delivery,” Texas Instruments, http://www.ti.com/lsds/ti/interface/usb-power-delivery-overview.page

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