臺灣博碩士論文加值系統

本論文實現的降壓轉換器是採用遲滯的控制架構，而所提出的近零電流感測電路在電感釋能至接近零時，能立即關閉下橋的功率電晶體來防止逆向電感電流的產生，進而減少導通損失和提升功率轉換效率，同時也加入了抗振鈴電路來消除降壓轉換器進入不連續導通模式時的振鈴效應，本論文使用TSMC 0.18-μm CMOS 3.3V 1P6M的製程進行實作，所實現的降壓轉換器在1 – 100mA的負載操作，除了能穩定的將3 – 3.3V的輸入電壓降壓至1.5V外，輸出電壓漣波亦穩定的控制在22.33mV – 28.67mV之間，因為逆向電感電流的消除，在輕載1mA的操作獲得81%的高功率轉換效率，含焊墊的降壓轉換器共使用了527.3µm × 663.8µm的晶片面積。

A hysteresis control buck converter with near-zero current detector is presented in this paper. The near-zero current detector can immediately turn off the power transistor to prevent the reverse inductor current when the inductor current is released to near zero, thereby reducing the conduction loss and improve the power efficiency. A ringing killer is also added in the proposed buck converter to eliminate the ringing effect when the buck converter is in the discontinuous conduction mode. The proposed buck converter is fabricated and designed by using TSMC 0.18-μm CMOS 3.3V 1P6M process. It can stably regulates a 3.3V input voltage to a 1.5V output voltage under load current of 1 – 100mA, and the output voltage ripple is between 22.33mV – 28.67mV. The power efficiency is 81% when the load current is 1mA, and the whole chip area is 527.3µm × 663.8µm.

摘要...i
Abstract...ii
誌謝...iii
目錄...iv
表目錄...vi
圖目錄...vii
第一章 緒論...1
1.1研究背景...1
1.2研究動機...1
1.3論文架構...2
第二章 相關技術分析...3
2.1降壓轉換器規格...3
2.1.1負載調節率(Load Regulation)...3
2.1.2線性調節率(Line Regulation)...4
2.1.3效率(Efficiency) [3]...4
2.2降壓轉換器控制方式...6
2.2.1脈波寬度調變控制(Pulse Width Modulation, PWM)...6
2.2.2脈波頻率調變控制-遲滯控制(Hysteresis)...7
2.3降壓轉換器於DCM輸出漣波電壓分析...8
2.3.1 DCM輸出電壓漣波...10
第三章 具零電流偵測電路之遲滯控制降壓轉換器...12
3.1具零電流偵測電路之遲滯控制降壓轉換電路實現...12
3.2峰值電流感測電路(Peak Current Sensor) [4]...13
3.3關閉時間產生電路(Off-Time Generator)...16
3.4零電流偵測電路(Zero Current Detector, ZCD)...17
3.4.1逆向電感電流之分析...18
3.4.2零電流偵測電路動作原理...20
3.5抗振鈴電路(Ringing Killer)...21
3.5.1振鈴現象...22
3.5.2抗振鈴電路...25
3.6具零電流偵測電路之遲滯控制降壓轉換器模擬結果...26
3.7具零電流偵測電路之遲滯控制降壓轉換器量測結果...30
第四章 具近零電流感測電路之降壓轉換器...34
4.1具近零電流感測電路之降壓轉換電路實現...34
4.2近零電流感測電路(Near-Zero Current Detector, NZCD)...35
4.2.1近零電流偵測電路(Near-Zero Current Sensor)...35
4.2.2不連續導通控制電路(DCM Controller)...37
4.3關閉時間產生電路(Off-Time Generator)...39
4.4具近零電流感測電路之降壓轉換器模擬結果...40
4.5具近零電流感測電路之降壓轉換器量測結果...44
4.5.1整體電路效能比較...48
第五章 結論...49
參考文獻...50
Extended Abstract...52
 

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