【正文】 統(tǒng)中電壓控制環(huán)路的核心部分，其性能優(yōu)劣直接影響著整個直流開關(guān)電源系統(tǒng)的穩(wěn) 定性，因而 對 高性能誤差放大器 的分析 是本論文的主要研究目標(biāo)。 最后 基于系統(tǒng)級 來分析 誤差放大器 。 II Abstract Due to their merits of wide input range, high efficiency, small in size and light in weight ect, switching power supplies are gaining more and more application areas in today’s modern world, ranging from domestic equipments to sophisticated munication and data handling systems, especially in portable devices, they have unsurpassable advantages. The rapid development of products in corresponding application areas requires the power supplies to have better performances. The robustness of switch—mode power supplies directly affect the performance of electronic devices. As one of the most important parts of switched mode DC to DC converters, error amplifier has significant influences on the voltage control loop’s stability. Thus this paper focuses on the design of high performance error amplifier for DCDC converters based on system requirements analysis. A buck DCDC converter was concerned, an error amplifier for the buck converter was designed from the points of view of system stability, load regulation and response speed requirements. At the first place, the Buck DCDC converter’s voltage control loop stability and polezero analysis was done based on a small signal model of the voltage control loop, the pensation scheme was proposed. At last, according to the system level to analysis the error amplifier. Key words： Switching power。 Error Amplifier. 1 目 錄 摘 要 ........................................................................................................................................... I Abstract.......................................................................................................................................II 1. 諸 論 ................................................................................................................................... 1 引言 ............................................................................................................................. 1 本文研究的目的與意義 ............................................................................................. 1 本論文主要研究內(nèi)容 ................................................................................................. 1 2. 開關(guān)電源基礎(chǔ)及其類型 ..................................................................................................... 2 開關(guān)電源基礎(chǔ)理論 ..................................................................................................... 2 開關(guān)電源基本工作原理 ....................................................................................... 2 開關(guān)電源的組成 ................................................................................................... 2 開關(guān)電源的各種分類 ........................................................................................... 3 開關(guān)電源典型結(jié)構(gòu) [6] .................................................................................................. 4 DCDC 變換器 ............................................................................................................ 7 變換器 ........................................................................................................... 8 變換器 ........................................................................................................ 10 3. Buck 型 DCDC 轉(zhuǎn)換器及其控制方式分析 ................................................................... 12 Buck 型 DCDC 轉(zhuǎn)換器 ........................................................................................... 12 Buck 型 DCDC 轉(zhuǎn)換器及其控制方式 ................................................................... 13 型 DCDC 轉(zhuǎn)換器工作原理 ...................................................................... 13 型 DCDC 轉(zhuǎn)換器的控制方式 .................................................................. 14 型 DCDC 轉(zhuǎn)換器工作模式 ...................................................................... 18 環(huán)路控制中誤差放大器的重要作用 ....................................................................... 18 4. 開關(guān)電源管理電路系統(tǒng)分析 ........................................................................................... 19 Buck 型 DCDC 轉(zhuǎn)換器 ........................................................................................... 19 開關(guān)電源控制環(huán)路的分析研究 ............................................................................... 20 型 DCDC 轉(zhuǎn)換器穩(wěn)定性分析 .................................................................. 20 型轉(zhuǎn)換器電壓環(huán)路控制模型 ..................................................................... 21 5. 誤差放大頻率特性及其補償策略 ................................................................................... 27 控制電路的頻率響應(yīng)分析 ....................................................................................... 27 2 頻率響應(yīng) ............................................................................................................. 27 開關(guān)電源輸出濾波電路分析 ............................................................................. 28 開關(guān)電源中負(fù)反饋及自激振蕩分析 ....................................................................... 30 負(fù)反饋自激振蕩 ................................................................................................. 30 誤差放大電路穩(wěn)定分析 ..................................................................................... 30 補償 誤差放大器 及頻率校正策略 ........................................................................... 32 類補償誤差放大器 ............................................................................................ 32 Ⅱ 類補償誤差放大器 .......................................................................................... 32 Ⅲ 型補償誤差放大器 .......................................................................................... 34 6. 閉環(huán)設(shè)計中誤差放大器的分析與研究 ........................................................................... 36 閉環(huán)控制系統(tǒng)中的誤差放大分析 .............................