【正文】 摘 要為了實(shí)現(xiàn)筆記本電源適配器的更好的穩(wěn)定性及低功耗性能，并且滿足市場(chǎng)上日益增長(zhǎng)的筆記本對(duì)筆記本電源適配器的需求，本系統(tǒng)設(shè)計(jì)了以單片機(jī) AVR 為最小系統(tǒng)的筆記本電源適配器，詳細(xì)介紹了單片機(jī) AVR 以及系統(tǒng)的硬件電路設(shè)計(jì)電路，包括輸入電路、整流濾波電路、變壓電路，采樣電路。軟件方面重點(diǎn)闡述了系統(tǒng)的軟件設(shè)計(jì)，以 C 語(yǔ)言為工具，采用面向?qū)ο蟮脑砗图夹g(shù)，進(jìn)行了詳細(xì)設(shè)計(jì)和編程實(shí)現(xiàn)了對(duì)硬件的控制，使得系統(tǒng)具有更好的穩(wěn)定性。最終完成了輸入為220V 交流電，輸出功率為 65W、輸出直流電壓為 19V 的筆記本電源適配器的設(shè)計(jì)。關(guān)鍵詞: 筆記本電源適配器 低功耗 AVR 單片機(jī)控制 AbstractLaptop power adapter in order to achieve better stability and low power consumption and meet the growing notebook market on the demand for notebook power adapter, the system is designed to minimize the system for the AVR microcontroller notebook power adapter Details of the AVR microcontroller and system design of hardware circuits, including input circuit, rectifier filter circuit, transformer circuit, sampling circuit. Software focuses on the software design, to C language as a tool for objectoriented principles and techniques, a detailed design and programming of the hardware39。s control, making the system more stability. Finally pleted the input is 220V AC, output power is 65W, the output voltage is 19V DC Notebook Power Adapter. Keywords: laptop power adapter low power consumption AVR microcontroller目 錄第 1 章 緒論 ............................................................................................................. 1 課題背景 ............................................................................................................ 1 電源適配器的國(guó)內(nèi)外現(xiàn)狀及發(fā)展趨勢(shì) ............................................................ 1 國(guó)內(nèi)外的現(xiàn)狀 ............................................................................................ 1 電源適配器的發(fā)展趨勢(shì) ............................................................................ 2 課題解決的問(wèn)題及研究?jī)?nèi)容 ............................................................................ 3 解決的問(wèn)題 ................................................................................................ 3 課題方案設(shè)計(jì)的確定 ................................................................................ 3 第 2 章 方案論證 ....................................................................................................... 5 設(shè)計(jì)參數(shù)指標(biāo) .................................................................................................... 5 方案選擇與論證 ................................................................................................ 5 整流電路的選擇與論證 ............................................................................ 5 濾波電路的選擇與論證 ............................................................................ 8 單片機(jī)的選擇與論證 ................................................................................ 8 輸出顯示的選擇與論證 ............................................................................ 9 驅(qū)動(dòng)電路的選擇與論證 .......................................................................... 11 溫度檢測(cè)電路的選擇與論證 .................................................................. 12 第 3 章 硬件電路 ..................................................................................................... 14 主控單元電路的設(shè)計(jì) ...................................................................................... 14 輸入單元電路的設(shè)計(jì) ...................................................................................... 17 變壓?jiǎn)卧娐返脑O(shè)計(jì) ...................................................................................... 19 采樣單元的設(shè)計(jì) .............................................................................................. 21 輸出電流的采樣設(shè)計(jì) .............................................................................. 21 輸出電壓的采樣設(shè)計(jì) .............................................................................. 22 驅(qū)動(dòng)單元電路的設(shè)計(jì) ...................................................................................... 23 顯示單元的設(shè)計(jì) .............................................................................................. 24 過(guò)溫保護(hù)單元的設(shè)計(jì) ...................................................................................... 26 溫度檢測(cè)電路的設(shè)計(jì) .............................................................................. 26 散熱電路的設(shè)計(jì) .................................................................................... 27 報(bào)警單元電路的設(shè)計(jì) ...................................................................................... 28 第 4 章 軟件設(shè)計(jì) ..................................................................................................... 29 PID 控制算法的作用及其控制器的設(shè)計(jì) ...................................................... 29 PID 控制算法的作用 ............................................................................... 29 控制器的設(shè)計(jì) .......................................................................................... 31 PID 控制參數(shù)的確定 ............................................................................... 33 程序流程圖設(shè)計(jì) .............................................................................................. 34 主程序流程圖 .......................................................................................... 34 顯示程序流程圖 ...................................................................................... 35 PWM 程序流程圖 .................................................................................... 37 過(guò)溫保護(hù)程序流程圖 .............................................................................. 38 AD 轉(zhuǎn)換程序圖 ........................................................................................ 40 總 結(jié) ....................................................................................................................... 42 致 謝 ....................................................................................................................... 43 參考文獻(xiàn) .................................................................................................................. 44 附錄 1：程序清單 ......