臺灣博碩士論文加值系統

本論文主題為運用脈波寬度調變技術(Pulse Width Modulation, PWM) 設計之單一電感雙輸出(Single-Inductor dual-Output, SIDO)直流對直流降壓轉換器。電路架構使用一個電感便能輸出兩個直流電壓，減少電感的使用以節省整體電路成本與電磁干擾(Electromagnetic interference, EMI)問題。我們使用TSMC 0.35μm 2P4M 3.3V/5V Mixed Signal CMOS 製程來實現電路，我們分別使用MATLAB與HSPICE進行各層級的模擬，本設計中包括緩啟動電路與零電流偵測電路，以避免電路啟動時產生過大的切換電流及避免電感電流逆向導通所造成的功率損失，並採用電壓模式控制，因相較於電流模式控制有較高之抗雜訊能力，模擬結果顯示，在操作於1MHz脈衝寬度調變模式(Pulse Width Modulation, PWM)與輸入電壓2.7~4.2V的情況下，輸出電壓穩定在1.2V與1.8V。在輸入電壓為 2.7V，可輸出之負載電流分別為50mA與50mA，效率可達94%。

This paper presents a design of single-inductor dual-output dc-dc buck converter using pulse width modulation technology. To reduce the cost and Electromagnetic interference, the design only uses one inductor and two dc voltage output are available. This regulator IC is fabricated in TSMC 0.35μm 2P4M 3.3V/5V Mixed Signal CMOS technology. The system level and circuit level are verified with MATLAB and HSPICE software, respectively. A soft start-up circuit and a zero current detection circuit are designed to avoid the excess large switching current at the start-up of the regulator and cause power loss by the reverse inductor current conduction. Simulation results shows the regulator can output 1.8 V and 1.2 V voltages in pulse width modulation mode with switching frequency of 1MHz when input voltage is within 2.7-4.2 V. This converter works under voltage control mode since it has better noise immunity compared to current control mode. When the input voltage is 2.7 V, the output load currents are 50mA and 50mA, and its efficiency is 94%.

A Thesis Submitted to
摘 要
ABSTRACT
誌 謝
目 錄
表目錄
圖目錄
第一章 緒論
1.1 背景介紹
1.2 研究動機
1.3 相關研究發展
1.4 論文架構
第二章 單電感多輸出轉換器介紹
2.1 轉換器分類
2.2 單電感多輸出轉換器介紹
2.3 單電感多輸出轉換器控制模式
2.4 單電感多輸出轉換器的控制器
2.5 切換式轉換器規格
第三章 單電感雙輸出轉換器電路設計流程
3.1 系統規格
3.2 電壓模式SIDO降壓轉換器之轉移函數分析
3.3 穩定度分析
第四章 電路設計及模擬
4.1 電路架構
4.2 誤差放大器
4.3 比較器
4.4 帶差參考電路
4.5 時脈訊號與鋸齒波產生器
4.6 零電流偵測電路
4.7 緩起動電路
4.8 S-R Latch
4.9 死區控制及緩衝電路
4.10 模擬結果
第五章 電路佈局及晶片效能
5.1 電路佈局
5.2 晶片效能
第六章 探討CSP封裝效應
6.1 IC 封裝
6.2 模擬結果
第七章 結論
7.1 結論
7.2 未來研究方向
參考文獻
自 述

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