臺灣博碩士論文加值系統

本論文包含兩個研究的題目，為單一電感三輸出直流-直流升壓轉換器與雙輸出二階型降壓式轉換器，其單一電感三輸出直流-直流升壓轉換器目的是利用單一電感實現三輸出的升壓轉換器，可減少電感使用的成本並達到多輸出的目的，而雙輸出二階型降壓式轉換器除了也具有雙輸出的功能外，具有較大的轉換比是它的特色，因此可以利用這個特色，使降壓器降壓至更低的電壓，並且在此研究中使用平均電流控制使暫態反應更加快速。
提出的電路皆使用台積電TSMC CMOS 0.35μm 2P4M 製程技術來完成。量測結果方面，其單一電感三輸出直流-直流升壓轉換器供應電壓範圍為2.5V至3.1V，最大負載電流可達300mA，輸出電壓範圍為2.8V至4.4V，其效率高達86.9%，適合應用於可攜式裝置上，或是SOC的系統。雙輸出二階型降壓式轉換器，供應電壓範圍為4.5V~5.5V，輸出電流可達1A，輸出電壓範圍為95mV至1.25V，適合作為低電壓的輸入電源。

There are two kinds of DC-DC converters presented in this study. One is the single-inductor tri-output (SITO) DC-DC boost converter, and the other one is the dual-output quadratic (DOQ) DC-DC buck converter. The proposed SITO DC-DC boost converter not only provides three output sources but also uses single inductor. The proposed DOQ DC-DC buck converter has a wider conversion ratio with ultra-low voltage for dual-output voltage sources. In this study, the methodology for controller design of DOQ DC-DC buck converter is given using average current-mode control.
The proposed circuits have been fabricated with TSMC 0.35mm 2P4M CMOS processes. The experimental results showed that SITO DC-DC boost converter can operate with supply voltage form 2.5V to 3.1V, which is suitable for single-cell lithium-ion battery supply applications. The output ripple voltage is about 40mV with a 220-μF off-chip capacitor and 10-μH off-chip inductor. The output maximum load current is up to 300mA. The output voltage range is from 2.8V to 4.4V. The maximum power efficiency is up to 86.9%.
The experimental results showed that DOQ DC-DC buck converter can operate with supply voltage form 4.5V to 5.5V. The output ripple voltage is about 50mV with a 10-μF off-chip capacitor and 5-μH and 6-μH off-chip inductor. The output maximum load current is up to 1A. The output voltage range is from 95mV to 1.25V.

Content

摘　要 I
Absatract II
誌　謝 IV
Content V
List of Table VIII
List of Figure IX
Chapter 1 INTRODUCTION 1
1.1 Background and Review 1
1.2 Motivation 7
1.3 Thesis Organization 8
Chapter 2 INTRODUCTION OF DC-DC BUCK AND BOOST CONVERTER 9
2.1 Principles of DC-DC Buck and Boost Converter 9
2.2 Continuous and Discontinuous Conduction Mode 13
2.2.1 Continuous and Discontinuous Conduction Mode of Buck Converter 14
2.2.1.1 Continuous Conduction Mode of Buck Converter 14
2.2.1.2 Discontinuous Conduction Mode of Buck Converter 19
2.2.2 Continuous and Discontinuous Conduction Mode of Boost Converter 22
2.2.2.1 Continuous Conduction Mode of Boost Converter 22
2.2.2.2 Discontinuous Conduction Mode of Boost Converter 28
2.3 The Specifications of DC-DC converter 31
2.3.1 Transient Response 31
2.3.2 Output Ripple Voltage 32
2.3.3 Line Regulation 32
2.3.4 Load Regulation 33
2.3.5 Efficiency 33
Chapter 3 CONTROL STRATEGIES OF DC-DC CONVERTER 34
3.1 Voltage-mode Control Strategy 35
3.1.1 Pulse-frequency Modulation (PFM) Control Mode 35
3.1.2 Pulse-width Modulation (PWM) Control Mode 35
3.1.2.1 Error Amplifier and Compensator 36
3.1.2.2 Pulse-width Modulation 39
3.1.2.3 Non-overlapping Circuit and Driving Circuit 40
3.2 Current-mode Control Strategy 41
3.2.1 Types of Current-mode Control 41
Chapter 4 SINGLE-INDUCTOR TRI-OUTPUT DC-DC BOOST CONVERTER 44
4.1 The Architecture of Voltage-mode Control System 44
4.2 Design and Analysis of Circuits 46
4.2.1 Comparator 46
4.2.2 Controller 47
4.2.3 Selector 47
4.2.4 Compensator 48
4.2.5 Pulse-width Modulation Circuit 49
4.2.6 Non-overlapping Circuit and Driving Circuit 51
4.3 Simulation Result of This Work 52
Chapter 5 Dual-output Quadratic DC-DC Buck Converter 54
5.1 The Principle and Analysis of Quadratic DC-DC Buck Converter 54
5.2 The Architecture of Current-mode Control System 57
5.3 Design and Analysis of Circuits 59
5.3.1 Comparator 59
5.3.2 Current Comparator 60
5.3.3 Selector and Compensator 61
5.3.4 Current Sensing Circuits 61
5.3.5 Average Current-mode Control Circuits 64
5.4 Simulation Result of This Work 66
Chapter 6 EXPERIMENTAL RESULTS 69
6.1 Micrograph 69
6.1.1 Micrograph of SITO DC-DC Boost Converter 69
6.1.2 Micrograph of DOQ DC-DC Buck Converter 74
6.2 Experimental Environment and Result 79
6.2.1 Experimental Environment and Result of SITO DC-DC Boost Converter 79
6.2.2 Experimental Environment and Result of DOQ DC-DC Buck Converter 86
Chapter 7 CONCLUSIONS AND FUTURE WORK 90
7.1 Conclusions 90
7.2 Future Work 90
Reference 92

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