******大学毕业设计（论文）毕业设计论文基于单片机的直流稳压电源的设计摘要直流稳压电源是电子技术常用的设备之一，广泛的应用于教学、科研等领域。传统的直流稳压电源几乎都是用旋纽开关调节电压，调节精度不高、难控制、体积大、结构复杂，而且经常跳变，使用麻烦。将单片机数字控制技术融入直流稳压电源的设计中，设计出的数字化直流稳压电源具有数码显示、数字输入调压、电压调节精度高的特点。而且通过软件编程，易于实现功能的扩展。数控电源目前的发展，主要朝着更高的数控精度和分辨率及更好的动态特性；更好的环保性能；智能化与高可靠性；更广泛的应用方向发展。本设计利用AT89S51作为主控芯片，控制数模转换模块DAC0832的输出电压，通过运算放大器OPA552放大输出。设置四个按键，来实现电压的增减，并带有数码显示模块。可以达到每步0.1V的精度，输出电压范围0~15V，电流可以达到200mA。关键词：数控电源；AT89S51；DAC0832；OPA552AbstractDirectcurrentvoltage-stabilizedpowersupplyisoneofthecommonlyusedequipmentinelectronictechnology.It’swidelyusedinteaching,researchingandotherfields.Mostofthetraditionaldirectcurrentvoltage-stabilizedpowersupplyusetheknobswitchtoadjustthevoltage.Ithasthetroubleoflow-precisionanddifficulttocontrol.Thestructureiscomplexandthevolumeislarge.Thenumericalcontroltechniqueofsinglechipmicrocomputerisadoptedinthedesignofdirectcurrentvoltage-stabilizedpowersupplyforadigitalized.Havingnumeraldisplay,thedirectcurrentpowercanadjustvoltageprogrammablyanddifferentiatevoltageprecisely.Moreover,it’seasytohaveitsfunctionenlargedthroughtheprogrammer.Numericalcontroldirectcurrentvoltage-stabilizedpowersupplymainlytowardtohigh-precision,high-resolution,betterdynamiccharacteristics,betterenvironmentalperformance,intelligent,highreliabilityandwiderapplicationdirection.Inthisdesign,usingtheAT89S51asmainmoduletocontroltheoutputvoltageofDAC0832.ThevoltageismagnifiedbyamplifierOPA552.Inthissystem,thestepofvoltageiscontrolbyfourkeys,andthedisplaymoduleisalsodesigned.Thestepprecisionis0.1V,theoutputvoltageisrangefrom0Vto15Vandthecurrentisupto200mA.Keywords:Numericalcontrolpower；AT89S51；DAC0832；OPA552目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc202000267"摘要PAGEREF_Toc202000267\hIHYPERLINK\l"_Toc202000268"AbstractPAGEREF_Toc202000268\hIIHYPERLINK\l"_Toc202000269"第1章绪论PAGEREF_Toc202000269\h1HYPERLINK\l"_Toc202000270"1.1课题的背景和意义PAGEREF_Toc202000270\h1HYPERLINK\l"_Toc202000271"1.2数控电源的发展PAGEREF