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研究生:陳鈺明
研究生(外文):Yu-Ming Chen
論文名稱:應用於白光LED驅動之PFM升壓轉換器的設計與實現
論文名稱(外文):Design and Implementation of PFM Boost Converterfor White LED Driver
指導教授:陳厚銘陳厚銘引用關係
指導教授(外文):Hou-Ming Chen
學位類別:碩士
校院名稱:國立虎尾科技大學
系所名稱:電機工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:75
中文關鍵詞:直流轉直流升壓轉換驅動電路電流式脈波頻率調變MATLAB
外文關鍵詞:DC-DC boost convertercurrent limit PFM controllerMATLAB
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本論文對LED供應電源所需的直流轉直流升壓轉換驅動電路提出設計與實現,其具有高的穩定性可適用於LED發光產品,例如: 行車紀錄器、GPS、PDAs、數位計速表等電子顯示器。
本文之直流轉直流升壓轉換驅動電路採用電流式脈波頻率調變的控制技術來實現,並以金氧半場效電晶體取代整流二極體來提升電路積體化,所設計的升壓轉換驅動電路包含遲滯比較器、電流感測電路、關閉時間控制電路、誤差放大器、閘級驅動電路、能隙參考電路以及數位邏輯控制電路。其輸入電壓為1.5V、輸出電壓為3.5V,此一白光LED驅動晶片是透過台積電的0.18μm 1P6M 3.3V CMOS製程來實現。
本文對輸出漣波電壓進行了行為分析並利用MATLAB建立一套演算法可有效縮短電路設計時間,而MATLAB和HSPICE的模擬比較結果顯示輸出漣波電壓的誤差率在負載為25mA時為0.26%,其輸出平均電壓的誤差率在25mA時為0.0114%的高精準度。


In this thesis, we proposed a DC-DC boost converter with high stability, which can be used in the power supply system of LED, such as : EDR,GPS, PDAs, digital speed meter and other electronic displays.
The current limit PFM controller has been used in this thesis , and the diode has been replaced by MOSFET, The input voltage and output voltage of this DC-DC boost converter is 1.5v and 3.5v,and it is composed of Hysteresis comparator , current sensing, off-time controller , error amplifier , gate driver , bandgap reference circuit and digital logic control circuit . In this thesis, a LED power supply drive of DC-DC boost converter IC is fabricated with TSMC 0.18μm 1P6M 3.3V Mixed Signal CMOS technology through CIC .
In this paper, we focus on output ripple voltage behavior analysis and use MATLAB to create an algorithms, in order to reduce the circuit design time effectively , MATLAB and HSPICE simulation results show that the output ripple voltage of the error rate is 0.26% on 25mA and average output voltage of the error rate is 0.0114% on 25mA, respectively.


摘要..........................................i
Abstract......................................ii
誌謝..........................................iii
目錄..........................................iV
圖目錄........................................Vi
第一章 緒論...................................1
1.1 背景簡介..................................1
1.2 文獻探討..................................5
1.3 論文架構..................................6
第二章 直流轉直流升壓轉換驅動電路.............7
2.1 升壓轉換器介紹(Boost Converter)...........7
2.1.1連續導通模式(Continuous-Conduction Mode)........8
2.1.2連續導通與不連續導通之邊界......................9
2.1.3不連續導通模式(Discontinuous-Conduction Mode)...11
2.2輸出電壓漣波(Output Ripple Voltage).................14
2.3 升壓轉換器的控制技術...............................15
2.3.1 脈波寬度調變 (Pulse Width Modulation, PWM).....15
2.3.2 脈波頻率調變 (Pulse Frequency Modulation, PFM).17
第三章 電流模式PFM升壓轉換電路架構分析.................20
3.3 比較器電路.........................................34
3.4 關閉時間控制電路...................................37
3.5 電流感測電路.......................................40
3.6 RS閂鎖電路........................................45
第四章 輸出漣波電壓分析分析與系統模擬..................48
4.1 輸出漣波電壓分析..............................48
4.2 MATLAB和HSPICE模擬比較............................53
4.2.1負載電流為100mA的模擬結果.......................54
4.2.2負載電流為75mA的模擬結果........................57
4.2.3負載電流為50mA的模擬結果........................60
4.2.3負載電流為25mA的模擬結果........................62
4.3電路實體佈局圖......................................66
第五章 結論............................................67
參考文獻...............................................68
Extended Abstract......................................70
簡歷...............................................75







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