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1、摘要本篇论文介绍的笔记本电源适配器的设计。是一种开关稳压电源，系统首先由工频电网接入220V，50HZ的交流电压，这个交流电压经过一级整流、滤波电路处理后送入由两个开关晶体管组成的逆变电路进行转换，晶体管管通过开通或切断电流通路将直流电压变成一个100kHz的交流电压，交流电压送入高频变压器进行降压，降压后输出的交流电再经过高频整流、滤波后输出一个16V的直流电压，输出端反馈回的电压，电流信号经过控制芯片TL494的处理后，由8脚和11脚输出宽度可调的脉冲信号给开关管，控制开关管的脉冲信号，从而达到恒流，稳压输出的目的。文中
2、第1章主要是对设计的总体介绍和题目所涉及到的背景和意义等。第2章开始主要叙述的是本次设计中所用到的芯片资料，包括内部结构、管脚功能典型应用电路。第3章开始详细的介绍了各部分电路的设计过程包括电路的设计，元件的选择，参数的计算等等。关键词：电源适配器，变压器，PWM控制电路，高频滤波２９AbstractAdesignofAdapterisintroducedinthistext.Beingakindofswitchissteadytovoltagepowersupply,thesystemisfirstconnectedint
3、oa220Vbytheworkfrequencyofcurrentnet,theexchangeselectricvoltagewith50HZ,thisexchangeselectricvoltagesendstogointoafterpassbyaclasscommutate,thefiltertheelectriccircuitprocessingisconstitutebytwoswitchtransistorsofgoagainstandchangetheelectriccircuitcarryonaconvers
4、ion,fieldtheeffecttubepasstobreakthroughorcutofftheelectriccurrentthoroughfaretobecomethedirectcurrentelectricvoltageanexchangeselectricvoltageof100kHz,communicatingtheelectricvoltagesendsintohighfrequencytransformertocarryondecliningtopress,theoutput'salternatecur
5、rentpassesbyagainhighfrequencytooutputadirectcurrentelectricvoltageof16Vaftercommutate,thefilterafterdecliningtopress,outputtingelectricvoltagethatcarryfeedback'sreturn,theelectriccurrentsignalisoutputtedadjustablepulsesignalofwidthby8feetand11feettotakecareoftothe
6、switchthroughtheprocessingofthecontrolchipTL494,controllingaswitchatubeofpulsesignal,attaininvariablenesstoflowthus,steadyvoltagetheoutput'spurpose.Thesafeworkthatstillestablishedtoleadtovoltageprotectionelectriccircuitintheswitchpowersupplyelectriccircuitwiththeel
7、ectricvoltage,electriccurrentledtoflowprotectionelectriccircuittoexamineanimportationandoutputtocarryinordertoforthesysteminadditionprovidedanemollientguarantee.Chapter1intextmainlyistototalintroductionandtopicofdesigninvolvetoofthebackgroundandmeaningChapter2begin
8、ningmainlywhattodescribeisinthisdesignuseofchipdata,includeinternalstructure,thepinfunctiontypicalmodelapplicationelectriccircuit.Chapter3beginni
