【经验】如何计算反激式开关电源的输出电容参数？
在反激式开关电源的设计中，输出电压纹波的大小将直接影响着负载电路的供电稳定性，减小纹波最有效的方法就是滤波电路，可通过电抗器和电容器来实现，输出电容的作用是滤除电流纹波使之变得平滑趋于直流的恒流特性，理论上容量越大滤波效果越好，但容量太大就变成了容性负载，所以要匹配起足够的负载工作就可以了。
如上图所示，L1和C1构成了一个滤波电路，其中C1就是输出电容，下面将通过一个实际需求进行输出电容的参数计算；
要求：为一个输出电压Vo=12V，输出功率为Po=24W的反激式开关电源选择一款合适的输出电容，使得输出电压纹波Vp-p小于100mV，其中开关电源的主频率为f=100kHz；
首先根据Vo、Po得出输出电流值Io=Po/Vo=2A，然后再根据纹波电流的要求，即Vp-p=Z*Io，得出输出阻抗Zo=Vp-p/Io=50mΩ；
其中输出阻抗Zo由输出电容的ESR及在电路中表现出的容抗Xc两部分组成，即Zo=Xc+ESR，根据经验值，可以将2/3的总阻抗分配给ESR，其余的1/3分配给容抗Xc，由此可得出ESR=2/3*Zo=33.33mΩ，Xc=16.67mΩ；
根据Xc=1/(2π*f*C)得出输出电容的容值计算公式C=1/(2π*f*Xc)=95.52uF，可根据实际情况选择100uF的电容；最后再进行耐压值的选择。
在12V的输出电路中，理论上选择16V耐压值的电容即可，但是为了保证在使用时突发状况下的安全性及使用寿命，推荐使用耐压值为25V的电容。这样我们就完成了整个输出电容参数的设计计算，即电容量C=100uF、ESR＜16.67mΩ，耐压值Vr=25V。
世强代理的KENDEIL品牌电解电容，高品质，低ESR，是开关电源输出电解电容的优秀选择，且其高耐压，纹波电流高达100A，在85℃工作温度下，寿命长达10万小时的优良特性可以满足各种工况下的高标准电容要求。
通过上面的介绍相信大家已经掌握了反激式开关电源的输出电容的设计计算方法，如有问题可留言互动交流或联系世强400-887-3266。
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【选型】Kendeil 铝电解电容选型指南（中文）
目录- 公司简介 铝电解电容产品路线图 铝电解电容零件编号系统 铝电解盖电容器重量表 铝电解电容质量 技术信息 形成电解质电容器 铝电解电容器的电气特性 铝电解电容器的可靠性 铝电解电容器的有效期 铝电解质电容器准则 铝生产控制流程 铝电解电容器 螺旋电容器 K01系列铝电解电容器 K02系列铝电解电容器 K03系列铝电解电容 K04系列铝电解电容 K07系列铝电解电容 K11系列铝电解电容器 K21系列高纹波铝电解电容器 K22系列高纹波铝电解电容器 K41系列铝电解电容 K42系列铝电解电容 K61系列铝电解电容 K71系列铝电解电容 K72系列铝电解电容 K91系列铝电解电容 K92系列低阻抗铝电解电容 电容器单元 K05系列铝电解电容 K06系列通用铝电解电容 K15专业系列铝电解电容 K16系列通用铝电解电容 K25低ESR系列铝电解电容 K26低ESR系列铝电解电容 K55系列小型铝电解电容 K75系列小型铝电解电容 K76系列小型铝电解电容 K85系列低ESR高寿命铝电解电容 K95低ESR系列铝电解电容 电机启动电容 K13系列铝电解电容 附件 卡环 绝缘六角螺母、垫圈 安装用五金件
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【选型】电解电容选型，这些参数是你必须知道的
详细介绍选型过程中应该重点关注哪些参数，以及如何选取合适的参数可以实现电路系统的稳定可靠运行。
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钽电容的漏电流是不是相比电解电容小很多？一般是多大的？电解电容的漏电流呢？
恰恰相反，一般情况钽电解电容比电解电容漏电流大些，一般的漏电流为0.04 Cr Vr μA，其中漏电流IL= K* Cr Vr，单位是μA，K是常数，不同厂家K值的标定也不一样，世强代理的Kendeil 铝电解电容漏电流ILmax= 0.003 Cr Vr μA，K值为0.003，同类产品已经是非常小的了。
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Kendeil（肯德尔）铝电解电容器选型指南（英文）
目录- COMPANY PRESENTATION TECHNICAL INFORMATION CAPACITORS ACCESSORIES
型号- K04350153__M0L220,K05100102_PM0C030,K42400152__M0H105,K02063222__M0E060,K02063473__M0J143,K02250152__M0G079,K42,K41,K22350682__M0J214,K05025472_PM0C030,K13125600000000B2,K01075123__M0E079,K41450682__M0J214,K42100222__M0E060,K02400471__M0G079,K19400332__M0H105,K06450331_PM0E040,K42025153__M0E060,K42400103__M0L220,K76250761_PM0D035,K41075472__M0E060,K13125200000002B2,K01040334__M0J143,K06500331_PM0E050,K91450332__M0J105,K75400122_PM0E060,K41016154__M0H105,K72450222__M0G105,K55,K21450332__M0L098,K05200221_PM0B030,K92500332__M0J105,2,K07160103__M0G115,K07350392__M0H105,K76450681_PM0E040,K21350152__M0G079,K76500681_PM0E055,K41075103__M0G079,K71400303__M0L220,K61,K02200681__M0E060,K41400222__M0J105,K04500682__M0J214,K71450472__M0H105,K06050223_PM0F050,K01100683__M0J21,K22420682__M0J214,K05050223_PM0F050,K42250153__M0J214,K05450331_PM0E050,K06050103_PM0D040,K22400682__M0J214,K03400222__M0J143,K76500681_PM0E060,K42063153__M0G105,K03500222__M0L145,K04500392__M0J143,K75450222_PM0V077,K71,K76350921_PM0D050,K91400222__M0G105,K72,K07350332__M0H096,K05040472_PM0D025,K75,K03450152__M0J105,K76,K42450682__M0J214,K61080423__M0J143,K95420681_PM0E050,K02250102__M0G079,K01200681__M0E060,K91420222__M0G105,K42400222__M0J105,K05400821_PM0E060,K05450331_PM0E040,K95400681_PM0E050,K01450681__M0G079,K05500181_PM0D050,K03500152__M0J143,K07400392__M0H130,K13320050000002B2,K55450561_PM0E060,K13250315000003B2,K13320063000003B2,K02063473__M0J105,K13125800000001B2,K02450152__M0J105,K18400222__M0G105,K76350122_PM0E045,K07160333__M0J143,K42063333__M0J105,K07350182__M0G096,K07200143__M0H130,K85,K13125315000002B2,K01400681__M0E079,K76200681_PM0C035,K07450392__M0J105,K76400242_PM0N077,K76350881_PM0D045,K41100473__M0J143,K76350242_PM0N060,K01025224__M0H105,K42016154__M0H105,K05200102_PM0E030,K02450681__M0G079,K75450182_PM0V060,K13250250000003B2,K91,K72450822__M0J143,K93,K92,K22450103__M0L220,K95,K94,K41400152__M0H105,K06500152_PM0N097,K02016105__M0L220,K91500332__M0J105,K02200222__M0G079,K06200221_PM0B030,K02063683__M0H105,K02450123__M0L220,K42450152__M0J105,K42040154__M0J143,K11400233__M0L240,K91450332__M0J143,K41025103__M0E060,K07160822__M0G105,K21400152__M0G079,K21420152__M0G079,K13320031000002B2,K91450152__M0G105,K75350122_PM0E050,K13250063000003B2,K07350392__M0H115,K13250040000001B2,K42350222__M0J105,K75420251_PM0C035,K19450681__M0G079,K42025103__M0E060,K19400222__M0G105,K41250102__M0G079,K75400511_PM0E030,K95450221_PM0D030,K07450392__M0J115,K05450471_PM0E050,K04550222__M0J143,K42100682__M0G105,K26500561_PM0F050,K01200332__M0H105,K91400332__M0H105,K01075103__M0G079,K21400332__M0J098,K42350152__M0H105,K72350133__M0J143,K95350102_PM0E060,K21420332__M0J098,K06100102_PM0C030,K75250761_PM0D035,K76500222_PM0N105,K91420332__M0H105,K95350391_PM0D035,K95350681_PM0E040,K06550101_PM0D030,K85450391_PM0E045,K02400153__M0L220,K06200102_PM0E040,K01200222__M0G079,K07400153__M0L220,K41050333__M0G105,K22350222__M0H105,K07250682__M0G130,K95420821_PM0E060,K75250152_PM0E050,K01050473__M0G105,K76250102_PM0E035,K03400102__M0H105,K15420102_PM0F060,K41200472__M0G105,K72350292__M0G079,K21450472__M0L098,K04450222__M0H105,K85400151_PM0C030,K71450682__M0J105,K76450272_PM0N105,K76400442_PM0V105,K75200681_PM0C035,K26400152_PM0N060,K95350471_PM0C050,K02400222__M0J105,K02450682__M0J214,K06500221_PM0D050,K92450102__M0G105,K76450102_PM0E060,K02040683__M0J105,K01500332__M0J105,K21400332__M0J079,K02100682__M0G105,K01016155__M0L220,K42040104__M0J105,16035000000000000,K01200152__M0E060,K02100222__M0E060,K02100473__M0J143,K11400163__M0J240,K11450253__M0L220,K75500182_PM0N105,K02400152__M0H105,K22350123__M0L220,K04550152__M0H105,K06550561_PM0F077,K42450331__M0E079,K01075472__M0E060,K72450172__M0G079,K03450122__M0H105,K06400821_PM0E060,K42400471__M0G079,K02016154__M0H105,K26400202_PM0F105,K85350391_PM0C050,K01200152__M0E079,K16420102_PM0F060,K85420331_PM0C055,K95420391_PM0D040,K01016154__M0H105,K42040473__M0H105,K03475561__M0G105,K72420103__M0L105,K16450152_PM0V060,K15450152_PM0V077,K91450681__M0G079,K76420122_PM0E060,K41016473__M0G079,K75450272_PM0N105,K01160333__M0J214,K42040104__M0J143,K020401040HM0J143,K06600271_PM0F050,K01040223__M0E079,K01400222__M0J105,K76450202_PM0F097,K41040473__M0H105,K91450102__M0G105,K05200471_PM0C030,K04550682__M0L220,K71350682__M0H105,K07450272__M0H115,K11450183__M0J214,K55450561_PM0E050,K25400152_PM0N077,K75450102_PM0E060,K95450271_PM0D040,K76250152_PM0E050,K85400271_PM0E030,K01350222__M0G105,K04400152__M0H105,K76450391_PM0D035,K11400183__M0L240,K02016224__M0J105,K04400332__M0H105,K75420352_PM0V105,K75250102_PM0E035,K01100222__M0E060,K01350681__M0E079,K75250252_PM0F060,K15420152_PM0F097,K75450391_PM0D040,K18400332__M0H105,K76200821_PM0C040,K41450822__M0J214,K07450272__M0H105,K75500681_PM0E060,K01400153__M0L220,K05050103_PM0D040,K02025153__M0E060,K92420471__M0G079,K22420222__M0H105,K42100333__M0J143,K07250392__M0G096,K76250252_PM0F060,K13125250000002B2,K01250471__M0E060,K22400392__M0J105,K41250152__M0G079,K21400392__M0J105,K41500682__M0J214,K71400392__
Kendeil（肯德尔）金属化聚丙烯直流支撑（DC-Link）薄膜电容器选型指南
目录- Metallized Polypropylene D.C. Link Capacitors Metallized Polypropylene D.C. Link Capacitors Metallized Polypropylene D.C. Link Capacitors
型号- K36800102__K0T125,K36900491__K0Q125,K37111151__K0L065,K36900201__K0J072,K37800221__K0L065,K36111251__K0J120,K36401131__K0U265,K36121182__K0U335,K3350150000K0K152,K36161321__K0T120,K36800421__K0J145,K3318135100K0K152,K36251660__K0Q140,K36900112__K0T150,K36301680__K0Q225,K36201191__K0T125,K36201401__K0U175,K36301121__K0U180,K37800351__K0S064,K36161851__K0U230,K37151111_K0S064,K3311190100K0K152,K36900272__K1U230,K36251351__K0U265,K36600781__K0J140,K37151500_K0L050,K36800352__K0U335,K36111252__K1U335,K36800102__K0R175,K36600152__K0T140,K37141111_K0L076,K37151760_K0L065,K36121331__K0T125,K36111901__K0U125,K36301181__K0U230,K3311110200K0K152,K36251131__K0T140,K37111141__K0L065,K36361600__K0U130,K36111421__K0Q155,K36201151__K0Q175,K36251291__K0U225,K3390013200K0K152,K36111361__K0Q120,K3311180100K0K152,K36800491__K0Q125,K36361420__K0T130,K36800551__K0Q122,K37900151__K0L050,K36401700__K0T230,K36301420__K0Q140,K37400381__K0L065,K36301151__K0T230,K37 TYPE,K37131101_K0L065,K36161151__K0J145,K36201271__K0T175,K36800501__K0T080,K37900351__K0S064,K36161121__K0Q095,K36161151__K0J140,K36600651__K0Q095,K36301101__K0T180,K36121331__K0Q155,K3315150100K0K152,K36361151__K0U265,K36111921__K0T180,K36161171__K0J175,K36251211__K0U180,K36401101__K0U230,K36800501__K0Q122,K3327115100K0K152,K36361111__K0T265,K36600302__K0T230,K37111101__K0L050,K36121501__K0T130,K36111421__K0Q135,K36800751__K0Q175,K36121551__K0T130,K36201201__K0Q225,K37151950_K0L076,K36121221__K0J120,K36301820__K0T180,K36600102__K0Q140,K36800651__K0Q145,K36900152__K0T175,K3313160100K0K152,K36401240__K0Q140,K36900551__K0Q122,K36600651__K0J120,K36800112__K0Q225,K33 TYPE,K36161421__K0T175,K36121251__K0Q120,K36361121__K1U230,K36121251__K0Q125,K36161121__K0J120,K37111191__K0L076,K36111501__K0Q175,K36600112__K0Q140,K37800151__K0L050,K36900202__K0T230,K36111172__K0U230,K36900501__K0T080,K36111401__K0Q145,K37141560_K0L050,K36900102__K0R175,K36800272__K1U230,K36111731__K0T150,K36600481__K0J095,K36900352__K0U335,K37131131_K0L076,K36800471__K0Q122,K36201801__K0U335,K36600202__K0T140,K36900331__K0J117,K3370020200K0K152,K3320130100K0K152,K36121471__K0Q225,K36800331__K0J117,K36600242__K0T175,K36900112__K0Q255,K36111122__K1T230,K36201281__K0T175,K36161471__K0T175,K3313165100K0K152,K36900471__K0Q122,K36900102__K0T125,K37141860_K0L065,K36111331__K0Q120,K36121122__K0U230,K36800201__K0J072,K36111681__K0Q225,K37111231__K0S064,K37141131_K0S064,K36121102__K0T230,K36 TYPE,K36161601__K0T230,K36201601__K0U260,K36900421__K0J147,K37131700_K0L050,K37400601__K0S064,K3322120100K0K152,K36361880__K0T225,K37900221__K0L065,K36161900__K0J095,K36201101__K0Q120,K36301660__K0T120,K36401380__K0Q225,K36121271__K0Q120,K36201371__K0T225,K36201750__K0J120,K36800202__K0T230,K36251211__K0T225,K36111651__K0T125,K36161251__K0Q175,K36900651__K0Q145,K36121421__K0Q175,K36251151__K0T175,K36600821__K0J155,K37400261__K0L050,K36121102__K0U175,K37131101_K0S064,K36900501__K0Q122,K3335110100K0K152,K36121681__K0T180,K36800112__K0T145,K36900751__K0Q175,K36800152__K0T175
Kendeil aluminium electrolytic screw type capacitors PRODUCT CHANGE
型号- K91,K71,K92,K61,K72,K42,K41,K11,K22,K21,K02,K01,K04,K03,K07
【产品】小型化尺寸的铝壳防浪涌电容器K93＆K94，具有低ESR特性，最大电容值为15000μF
肯德尔通过将低ESR与小型化尺寸这两个特点结合起来，推出了最新的螺钉端子类型系列的电解电容器：K93和K94。专为专业/工业应用而设计，如开关电源，高纹波电流转换器，电机驱动器。
产品 发布时间 : 2022-12-28
电子商城
现货市场
服务
整体外形尺寸小至0.6*0.3*0.3mm (DFN0603)，工作电压范围覆盖2.5V~36V，电容值低至0.2pF，浪涌能力最高可达240安培，静电等级可达空气放电、接触放电±30KV。提供免费浪涌测试仪、静电测试仪测试。
提交需求>
可定制OGS一片式电容屏，G+G电容屏，G+F电容屏，G+F+F电容屏，尺寸范围：1”~21”，单层产品厚度：0.55mm~2mm，可按客户要求在产品上附加防反射，防指纹，多色丝印，钻孔磨边，2.5D导圆角等工艺。
最小起订量： 1000 提交需求>
授权代理品牌：集成电路
授权代理品牌：分立元件
授权代理品牌：接插件及结构件
授权代理品牌：部件、组件及配件
授权代理品牌：电源及模块
授权代理品牌：电子材料
授权代理品牌：仪器仪表及测试配组件
授权代理品牌：电工工具及材料
授权代理品牌：机械电子元件
授权代理品牌：加工与定制
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