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1、毕业设计(论文)基于TOP225Y的开关电源摘要随着电子技术的高速发展,电子系统的应用领域越来越广泛,电子设备的种类也越来越多,电子设备与人们的工作、生活的关系日益密切。任何电子设备都离不开可靠的电源,它们对电源的要求也越来越高。电子设备的小型化和低成本化使电源以轻、薄、小和高效率为发展方向。开关电源因其具有体积小、重量轻、效率高、发热量低、可靠性高、低噪声、节能、安全等众多优点,自20世纪90年代中期以来便显示出强大的生命力,引起了国内外电源界的普遍关注。目前,开关电源继续朝着短、小、轻、薄、节能、安全的方向发展,涌现出许多开关电源的新技术和新产品。
2、TOPSwitchⅡ系列芯片是Powerlntegration公司生产的开关电源专用集成电路。它将脉宽调制电路与高压MOSFET开关管驱动电路等集成在一起,具备完善的保护功能。本文介绍了开关电源的发展,贴点,分类;利用当今开关电源发展的新技术、新趋势,设计并制作出安全、高效、节能的辅助电源开关电源。本开关电源了TOP225y等芯片以及其他的电路元件配合,设计出能实现自动稳压功能的单端反激式拓扑辅助电源开关电源。关键词:辅助电源,开关电源,top225y,单端反激IV毕业设计(论文)BASEDONTHETOP225YSWITCHINGPOWERSUPPL
3、YABSTRACTAlongwiththerapiddevelopmentofelectronictechnology,theapplicationofelectronicsystemismoreandmoreextensive,typesofelectronicequipment,electronicequipmentisalsomoreandmorepeopleworkandlife,therelationshipisincreasinglyclose.Anyelectronicequipmentareinseparablefromthepower
4、supplyreliabilityofpowersupply,thehigherrequirements.Electronicequipmentminiaturizedandlowcostofthepowertolightandthinandsmallandefficientfordevelopmentdirection.Switchingpowersupplybecauseofitssmallvolume,lightweight,highefficiency,lowcalorificvalue,highreliability,lownoise,ene
5、rgysaving,safety,sincemanyadvantagesinthemid1990shasdemonstratedtheformidablevitality,thepoweroftheworld'sattention.Atpresent,switchpower,small,movetowardslightandthin,energysaving,safetyandthedirectionofdevelopment,therearelotsofswitchpowersupplyofnewtechnologyandnewproducts.TO
6、PSwitchⅡseriesPowerlntegrationchipisswitchpowercompanyproducesspecialintegratedcircuits.ItwillpulsewidthmodulationcircuitandthehighvoltageMOSFETswitchtubedrivecircuitintegratedtogether,withperfectprotectionfunction.Thepaperintroducesthedevelopmentofswitchpowersupply,stick,classi
7、fication,Usingthecurrentdevelopmentofswitchpowersupplyofnewtechnologyandnewtrends,designandproducesafe,efficient,energy-savingauxiliarypowerswitchpowersupply.TheswitchingpowersupplyforTOP225ychipsandPC817ATL431,suchchipsandothercircuitelements,designthroughrectifier,feedback,fil
8、tering,etc.Torealizeautomaticvoltagecircuitvolt