臺灣博碩士論文加值系統

本論文提出使用新型電流感測與相位頻率鎖定技術之適應性導通時間降壓轉換器與新型電流感測技術之電流模式降壓式轉換器。第一部分為使用新型電流感測與相位頻率鎖定技術之適應性導通時間降壓式轉換器。透過鎖相鎖頻技術改善了適應性導通時間控制器因非理想效應影響電路導致切換頻率變動的缺點，並使用DCR感測電路感測出仿電感電流的電壓值用於控制迴路。晶片採用TSMC 0.35um 2P4M製程來實現，晶片面積1.44×1.45 mm2，輸入電壓3 V-3.6 V，輸出電壓1 V-2.5 V。當輸出電壓1.8 V，負載電流由50 mA切換至500 mA及500 mA切換至50 mA，暫態響應分別為2 us及2.4 us，效率最高為90.9%。
第二部分為新型電流感測技術之電流模式降壓式轉換器，使用積分式電流感測電路感測電感電流，可以避免開關在切換時產生的雜訊與突波之影響，晶片採用TSMC 0.18 um 1P6M製程來實現，晶片面積1.1×1.12 mm2，輸入電壓3 V-3.6 V，輸出電壓1 V-2.5 V。當輸出電壓1.8 V，負載電流由50 mA切換至500 mA及500 mA切換至50 mA，暫態響應分別為2 us及2 us，效率最高為91.4%。

This thesis proposes an adaptive on-time buck converter with new current-sensing and phase-frequency-locked techniques and a current-mode buck converter with new current-sensing techniques. The first part is adaptive on-time buck converter with new current-sensing and phase-frequency-locked techniques. Through the phase-frequency-locked techniques, the shortcomings of the adaptive on-time controller that the switching frequency changes due to the influence of the non-ideal effect on the circuit are improved, and the DCR current-sensing circuit is used to sense the voltage value of the imitation inductor current for the control loop. The chip has been implemented with TSMC 0.35 um 2P4M process, the chip area is 1.44×1.45 mm2, the input voltage is 3 V-3.6 V, the output voltage is 1 V-2.5 V, when the output voltage is 1.8 V, the load current is switched from 50 mA to 500 mA and 500 mA to 50 mA, the transient response is 2 us and 2.4 us respectively, and the highest efficiency is 90.9%.
The second part is a current-mode buck converter with new current-sensing techniques. The use of integral current-sensing to sense the inductor current can avoid high-frequency noise generated by the switch during switching, so the stability of the circuit can be improved. The chip was implemented with the TSMC 0.18 um 1P6M process, and the chip area is 1.1× 1.12 mm2, the input voltage is 3 V-3.6 V, the output voltage is 1 V-2.5 V, when the output voltage is 1.8 V, the load current is switched from 50 mA to 500 mA and 500 mA to 50 mA, the transient response is 2 us and 2 us respectively, and the highest efficiency is 91.4%.

摘要 i
Abstract ii
誌謝 iv
目錄 v
圖目錄 viii
表目錄 xii
第一章 序論 1
1.1 研究背景與發展近況 1
1.2 研究動機與目的 4
1.3 論文架構 4
第二章 切換式降壓轉換器架構介紹與原理分析 5
2.1 切換式降壓轉換器原理分析 5
2.1.1 連續導通模式 6
2.1.2 邊界導通模式 10
2.1.3 非連續導通模式 11
2.2 切換式轉換器控制模式 13
2.2.1 電壓模式 13
2.2.2 電流模式 15
2.2.3 漣波模式 17
2.3 切換式轉換器特性與定義 19
2.3.1 線性調節率 19
2.3.2 負載調節率 19
2.3.3 暫態響應 19
2.3.4 漣波電壓 21
2.3.5損耗與效率 21
第三章 使用新型電流感測與相位頻率鎖定技術之適應性導通時間降壓轉換器 24
3.1 架構簡介 24
3.1.1電流感測電路 25
3.1.2 適應性導通時間控制器 26
3.1.3 補償器 28
3.1.4 運算放大器 29
3.1.5 磁滯比較器 30
3.1.6 鎖相迴路 31
3.2 電路模擬 34
3.3 整體電路佈局與量測結果 40
3.3.1 晶片佈局 40
3.3.2 晶片腳位與定義 41
3.3.3 量測環境 43
3.3.4 量測結果 44
3.4 規格表與相關文獻比較 49
第四章 新型電流感測技術之電流模式降壓轉換器 51
4.1 架構簡介 51
4.1.1 新型積分式電流感測電路 52
4.1.2 固定時脈產生器 56
4.1.3 非重疊電路與驅動電路 57
4.2 電路模擬 58
4.3 整體電路佈局與量測結果 62
4.3.1 晶片佈局 62
4.3.2 晶片腳位與定義 63
4.3.3 量測環境 65
4.3.4 量測結果 66
4.4 規格表與相關文獻比較 73
第五章 結論與未來展望 75
5.1 結論 75
5.2 未來展望 76
參考文獻 77

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