臺灣博碩士論文加值系統

本論文內容主要是設計一個電感電流偵測電路，適用於遲滯電流控制升壓式轉換器，其具有結構簡單、提升整體轉換效率等優點。

論文中提出利用遲滯電流控制模式具有結構簡單–不需要設計補償斜率電路、動態響應較佳–系統頻寬較寬之特點，避免了在系統控制上的問題，且具有較大的頻寬，並且利用偵測電晶體(SENSEFETs)與切換電容技術，使得轉換效率提升，克服了轉換器在偵測電感電流時，消耗太多能量的問題。

本論文提出的方法運用在遲滯電流控制模式直流/直流升壓轉換器，並使用台灣積體電路公司二五微米高壓製程模擬與實現，結果顯示電壓可操作範圍為3.5~4.5V，輸出電壓漣波小於72.5mV，電流偵測精確度達95%，轉換效率最高可達91.7%。

A novel on-chip current sensing technique suitable for hysteresis-current-controlled (HCC) boost converter is presented which has some advantages, such as simple structure, the improvement of power conversion efficiency, etc.

In this thesis, the proposed hysteresis current mode boost converter has a simple structure (the slope compensation is not required) and fast transient response (it has a higher crossover frequency and enough phase margin to avoid the oscillation). When using the proposed SENSEFETs structure and the switching-capacitor technique to monitor current on a power conductor, the power efficiency of the converter can be improved and subsequently has low power consumption.

The proposed current sensing technique has been fabricated by TSMC 0.25μm CMOS HV process. In the boost converter, the operation voltage is from 3.5V to 4.5V, the output voltage ripples less than 72.5mV, current sensor can achieve 95 percent sensing accuracy, and the 91.7 percent power efficiency was achieved.

目錄
摘要 i
Abstract ii
致謝 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 穩壓器分類 2
1.2.1 線性穩壓器 2
1.2.2 電荷幫浦式穩壓器 3
1.2.3 切換式穩壓器 5
1.2.4 比較 9
1.3 研究動機及目的 9
1.4 論文架構 13
第二章 文獻回顧 14
2.1 直流對直流電壓轉換之切換式穩壓器組態 14
2.2 遲滯電流控制穩壓器運作原理 16
2.3 遲滯電流控制升壓穩壓器小訊號模型 17
2.4 電流偵測技術 20
2.4.1 串聯偵測電阻(Series-Sense Resistor) 20
2.4.2 偵測電晶體(SENSEFETs) 21
2.5 負載調節率 22
2.6 線調節率 22
2.7 轉換效率 23
2.8 設計目標 25
2.9 總結 26
第三章 電路架構原理與設計 27
3.1 設計概念 27
3.2 系統架構 27
3.3 電感電流偵測電路 30
3.4 系統小訊號模型 33
第四章 電路實現與模擬分析 42
4.1 穩定參考電壓源 42
4.2 誤差放大器 45
4.3 遲滯比較器 47
4.4 固定遲滯窗口電路 49
4.5 緩啟動電路與保護電路 50
4.6 PI補償器 51
4.7 電流偵測電路 52
4.8 全電路模擬 55
4.8.1 負載穩壓及暫態響應模擬結果 55
4.8.2 效率改善模擬結果 57
第五章 電路製作與量測 59
5.1 佈局考量 59
5.2 量測規劃 61
5.3 量測結果 61
5.4 量測後建議 63
第六章 結論與建議 64
6.1 結論 64
6.2 建議與未來展望 64
參考文獻 66

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