DZ096開關(guān)電源的應(yīng)用——液晶顯示器電源的設(shè)計

DZ096開關(guān)電源的應(yīng)用——液晶顯示器電源的設(shè)計,dz096,開關(guān)電源,應(yīng)用,利用,運(yùn)用,液晶顯示器,電源,設(shè)計 I開關(guān)電源的應(yīng)用——液晶顯示器的設(shè)計專業(yè)：通信工程 學(xué)號：1002566 姓名：賴宏德 指導(dǎo)教師：葉宇煌中文摘要隨著電力電子技術(shù)的發(fā)展，電力電子設(shè)備與人們的工作、生活關(guān)系日益密切，而任何電子設(shè)備都離不開可靠的電源。進(jìn)入 90 年代開關(guān)電源相繼進(jìn)入各種電子、電器設(shè)備領(lǐng)域，如程控交換機(jī)、通訊、電子檢測設(shè)備電源、控制設(shè)備電源等。單片開關(guān)電源管理集成電路具有高集成度、高性價比、簡單外圍電路、優(yōu)越性能指標(biāo)等優(yōu)點(diǎn)，目前已成為國際上開發(fā)中、小功率開關(guān)電源、精密開關(guān)電源、專用開關(guān)電源以及開關(guān)電源模塊的優(yōu)選集成電路，使得開關(guān)電源正朝著短、小、輕、薄的方向發(fā)展，所以得到了廣泛應(yīng)用。本文設(shè)計了一種應(yīng)用于液晶顯示器終端的電流模式開關(guān)電源控制電路.該電路具有短路保護(hù)、過壓保護(hù)、過流保護(hù)等功能。論文首先對國內(nèi)外的發(fā)展與趨勢和兩種電源的基本原理做了介紹。 論文的第二章介紹了開關(guān)電源控制方式。開關(guān)電源有三種控制方式：脈沖寬度調(diào)制(PW M)、脈沖頻率調(diào)制(PFM)、脈沖寬度頻率調(diào)制 (PWM-PFM)。介紹了脈寬調(diào)制式開關(guān)電源的基本原理。著重介紹了脈寬調(diào)制方式下開關(guān)電源控制方式的選擇。闡述了與傳統(tǒng)的電壓控制模式相比，電流控制模式具有許多優(yōu)越性，同時也存在一些必須克服的問題。文章的第三章是對本次設(shè)計所需的主要電子元件進(jìn)行介紹。主要介紹了 TL431 集成電路、UC3842 集成電路、光電偶合器的原理及其應(yīng)用。文章的第四章是介紹電路總體結(jié)構(gòu)設(shè)計。闡述開關(guān)電源電路工作原理以及總體設(shè)計。文章的第五章主要介紹開關(guān)電源的 EMC 問題。首先分析開關(guān)電源電磁干擾的產(chǎn)生機(jī)理，然后介紹 EMI 濾波器的工作原理及安裝注意要點(diǎn)，最后論述設(shè)計電路板的幾個原則。文章的第六章是對實(shí)際設(shè)計制作電源測試及其實(shí)驗總結(jié)?！娟P(guān)鍵詞】 開關(guān)電源， PWM 工作方式，電流控制模式，UC3842，TL431IIThe application of Switching Power Supply ABSTRACTWith the development of electric and electronic technology, the electric and Electronic equipments have been used broadly in our work and life. Every electronic equipment can not work without reliable power. In 1990s the switching power had been used in all kinds of fields, such as exchanger, communication and control equipments. Single-chips witching power supply management Integrated Circuit (IC) has many virtues such as high integration level, most cost effective, lowest component count switcher solution, and high performance. The switching power IC is selected firstly in the design of high power switching power supply, precision switching power supply, application specific switching power supply and so on in the world, which has been making switching power supply short, small, light and thin。So it has been used broadly.A current-model controller witch is applied in liquid crystal display terminal is designed in this thesis. The whole circuit includes Short circuit protection，Over Voltage Protection and over current protection circuit .The development and tendency of domestic and foreign and the basic principle of two kind powers are presented in the front part of this paper.In chapter II, the control method of Switching power supply is introduced. Switching Power Supply has three kinds of control circuits: Pulse Width Modulation (PWM) Pulse Frequency Modulation (PFM) Pulse Width and Frequency Modulation (PWM-PFM). The switching power supply basic principle of Pulse Width Modulation is introduced in the thesis. Under pulse-duration modulation way switching power supply control mode choice is introduced in detail. Compares with the traditional voltage control model, the current control model has many superiority. But simultaneously it also has some problems that must be over came.In chapter III，the main electronic component needs which to this design are presented. Mainly introduced the principle and application of the rectification diode, power MOSFET, the TL431 integrated circuit, the UC3842 integrated circuit. In chapter IV, the current model control PWM converter is discussed in detail. The circuit overall structural design and the switching power supply circuit principle of work as well as the system design is introduced in chapter IV. Switching power supply EMC question is introduced mainly in chapter VI. Firstly, analyzing the production mechanism of the switching power supply electronmagetic interference, then introducing the work principle of the EMI filter and the important points that should be paying attention to when Installing, finally elaborating several principles of designing circuit board. Finally, some experimental results are presented.Keyword： switching power supply,PWM,the current control model,UC3842 ,TL431