摘要高频数字控制DC/DC变换器相对于传统的模拟方案有显著的优点,但是,采用高频和数字控制方法,也会带来诸如功耗增加、极限环效应等过去在低频、模拟控制领域内所没有的困难。解决这些困难,是一件极具挑战性的工作。本文介绍了DC/DC变换器的分类和基本原理,对比了模拟控制方案和数字控制方案的优缺点,详细论述了数字控制方案的结构,优点和控制理论与实现,反馈控制系统的建模与仿真。介绍了控制芯片各组成部分的各种电路结构,电路结构的选择,提出了一种新的用于DC/DC变换器的数字控制芯片的延迟环A/D变换器。本文介绍了控制芯片的设计流程、混合信号设计验证的方法,给出了仿真结果和版图。介绍了设计中的难点和一些经验教训。文章最后介绍了DCIDC变换器系统平台的搭建,PCB设计方法,测试方法。给出了部分简单的功能测试结果,并展望了数字电源的发展前景。关键词:DC/DC变换器,Buck变换器,PID控制,脉宽调制,延迟环A/D变换器,混合信号设计中图分类号:TN432AbstractHigh-frequencydigitalcontrolDC/DCconverterissuperiortotraditionalanalogcontrolscheme.Buthigh-frequencydigitalcontrollerwillintroducesomeproblemswhichwerenotmetbefore,suchashigherpowerconsumptionsandlimitcycleeffect.It'sachallengetoresolvetheseproblems.ThecategorizationandbasicprincipleofDC/DCconverterareintroduced,andinthisarticleanalogcontrolschemeanddigitalcontrolschemearecompared,thearchitecture,meritsofdigitalcontrolschemeandcontroltheoryandimplementation,feedbackcontrolsystemmodelestablishmentandsimulationareexplainedindetail.Thecircuitsofeachpartareintroducedandtheselectionoftherightcircuitsismentioned.Inthecircuitofthisarticle,adelay-ringA/Dconverterweproposedisadopted.tothisarticle,thedesignflowandmix-signaldesignandverificationmethodarealsointroduced,andthesimulationresultsandlayoutisshown.Thetopicofthisarticlefocusedonthedificultiesofthedesignandtheexperienceduringthedesign.Inthelastofthearticle,thebuildingofthesystemplatform,PCBdesignandthetestmethodareintroduced.Thesimplefunctiontestresultsofdelay-ringA/Dconverterareshown,andweprospectthefutureofdigitalpower.Keywords:DC/DCconverter,Buckconverter,PIDcontrolPWM,delay-ringA/Dconverter,mix-signaldesignCL...