臺灣博碩士論文加值系統

本論文提出一單電感雙輸出交換式直流對直流轉換器之設計與實現，其中包含升壓器、降壓器及回授控制電路。本系統操作於擬似連續導通操作模式，針對二個輸出端之輸出電壓與負載電流調節四個責任週期，分別控制電感充電、降壓放電、昇壓放電及自走時間，以動態調整電感電流準位，達到穩壓及高效率的目的。控制電路結合電感電流感測與雙壓迴路，分別補償昇壓器與降壓器兩個迴路之相位與增益，以降低負載變異、輸入電壓變異與雙輸出電壓交互響應對系統之影響。
本論文主要針對此系統作分析與設計並實現電路。此直流對直流轉換器以TSMC 0.35-um 2P4M CMOS製成實現，晶片大小為 1.18x1.16mm2。 根據量測的結果，最大輸出漣波電壓在40毫伏以下，而輸出電流範圍在50mA到500mA之間。輸入電壓範圍在2V到2.4V之間，且輸出電壓分別為1.2V 與2.4V，直流對直流轉換器之操作頻率為350千赫茲。

The design and implementation of a Signal-Inductor-Double-Output(SIDO) switching buck-boost DC-DC converter is presented. The system operates in pseudo-continuous conduction mode(PCCM). By adaptively controlling the duty intervals for inductor charging, buck conversion, boost conversion, and freewheeling respectively, the system manages the dynamic inductor current level to achieve stable output voltages and high efficiency.
The DC-DC converter was implemented in TSMC 0.35-μm 2P4M CMOS process with die size of 1.18×1.16 mm2. According to measurement results, the maximum peak-to peak output voltage ripple less than 90mV and current ranges between 50mA and 500mA. The DC-DC converter operates in frequency 350kHz and supply voltage ranges from 2 to 2.4V. The output voltage is 1.2V and 2.4V.

1.1 Background 1
Chapter 1 Introduction 1
1. 2 DC-DC Converter 2
1.2.1 Linear Regulator 2
1.2.2 Switching Regulator 2
1. 3 SIDO DC-DC Converter 3
1.4 Specifications of Switching Regulator 5
1.4. 1 Load regulation 5
1.4. 2 Line Regulation 5
1.4. 3 Cross Regulation 6
1.4.4 Output Voltage Ripple 6
1.4.5 Temperature Regulation 7
1.4.6 Transient Response 7
1.4. 7 Efficiency 10
1.5 Thesis organization 13
Chapter 2 Fundamentals of SIDO DC-DC Converter 15
2. 1 Basic Principle of SIDO DC-DC Converter 15
2.1.1 Continuous Conduction Mode 18
2.1. 2 Discontinuous Conduction Mode 21
2.1. 3 Pseudo Continuous Conduction Mode 22
Chapter 3 The Proposed System Mechanisms 25
3. 1 Architecture of the Proposed SIDO DC-DC Converter 25
3. 1 Operation Mode of SIDO DC-DC Converter 27
3. 2 Analysis of SIDO DC-DC Converter in Steady State[17] 28
3.3. 1 Open-loop analysis 28
3.3.2 Analysis of close loop 39
3.3.4 Stability Analysis and Compensation 42
Chapter 4 Circuit Design and Analysis 49
4. 1 Dynamic DC level of SIDO DC-DC Converter [8] 49
4. 2 Current Sensor and Charge Reservation Circuit [11] 52
4. 4 Pulse Width Modulator 54
4. 5 Band-Gap Voltage Reference Circuit 55
4. 6 Clock Generator 58
4. 7 Comparator 59
4. 8 Operation Amplifier 60
4. 9 Driver Circuit 62
Chapter 5 System Simulation and Measurement 64
5. 1 Simulation Results 64
5. 2 Measurement Results 68
Chapter 6 Conclusions and Future Work 77
6. 1 Conclusions 77
6. 2 Future Work 77
Bibliography 78

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