TDK-EPChasjoinedSTMicroelectronicstodevelopareferencedesignforLEDlampballastsforuseinstreetlighting.
TDK-EPCoffersallitskeyelectroniccomponentssuchascapacitors,varistorsandinductors.
Thepowersupplyhasanoutputof130Watanoutputvoltageof48V.
LEDsareknownfortheirhighefficiencyandlongoperatinglife.
Thismakesthemincreasinglypopularforlightingtechnology,wheretheyareconsideredtobeinnovationdrivers.
Thereason:theymakeadecisivecontributiontoreducingtheenergyconsumptionoflampsforindoorandoutdooruse.
Thisappliesespeciallytostreetlighting,whereefficiency,operatinglife,maintenanceandenergyconsumptionplayakeyroleinreducingoverallcosts.
Inordertoensuremaintenance-freeoperation,thecorrespondingballastforanLEDlampmustbejustasefficientandhaveasimilarlylongoperatinglifeastheLEDsthemselves.
Two-stagereferencedesignThenewreferencedesigndevelopedbyTDK-EPCandSTMicroelectronics(Figure1)consistsoftwostages:afront-endpowerfactorcorrection(PFC)stagewiththeL6562ATcontrollerfromSTMicroelectronicsandanLLCresonantconverterbasedontheL6599ATpowerIC.
Thekeypropertiesofthedesignincludeaveryhighefficiencyofover90percent,abroadrangeofinputvoltage,i.
e.
anAClinevoltageofbetween85and305V,aswellashighreliabilityandalongoperatinglife.
Asthereliabilityormeantimebetweenfailures(MTBF)ofpowersuppliesdependsonthefailurerateoftheelectrolyticcapacitorsused,thisreferencedesigntakesaninnovativeapproach:itmakesexclusiveuseoffilmcapacitorsinsteadofelectrolyticonesforsmoothingandstorageintheDClinkcircuit.
Thedevelopershavealsoconsideredthederatingofthecomponents,thusreducingtheirloadinlinewithRecommendationMIL-HDBK-217D.
WiththeuseofthenewL6562ATandL6599ATICsfromSTMicroelectronics,thenumberofactivecomponentswasalsominimized,thusincreasingtheMTBFandsimultaneouslyoptimizingthetotalcostofthecomponents.
Thankstothehighefficiencyofthecircuit,thePFCstageneedsonlyasmallheatsink.
Thereferencedesignisadditionallyprotectedagainstoverloadandshortcircuit,open-circuitoperationateverystageandovervoltagesattheinput.
Thesystemautomaticallyrestartsafterafault.
ReferencedesignsMarch2011LampballastforLEDstreetlightingFigure1:Mainboardwithrectifier,PFCstageandresonantconverterTheuseoffilmcapacitorsassuresveryhighreliabilityandalongoperatinglife.
Applications&Cases1/EPCOSAG·ATDKGroupCompany·Edition2015·www.
epcos.
comKeypropertiesExtendedEuropeanACinputvoltagerangeof85to305Vatafrequencyof45to55HzOutputvoltageof48Vat2.
7ALongoperatinglifethankstoEPCOSfilmcapacitorsPowerharmonicstoEN61000-3-2ClassCEfficiencyatnominalloadofover90percentElectromagneticcompatibilitytoEN55022ClassB,EN55015Safety:doubleinsulationtoEN60950,SELVStage1:PFCcircuitThePFCstage,whichoperatesintransitionmode,actsasaprecontrollertosupplyenergytotheresonancestageat450V.
ThePFCpowerstageisaconventionalboostconverterconnectedtotheoutputoftherectifierbridge.
Italsoincludestheboostinductor,rectifierdiodeandoutputcapacitors.
ThePFCoutputcapacitorsareEPCOSfilmcapacitorsof5F/800V.
AMOSFETactsastheboostswitch.
TheboardisequippedwithaninputEMCfilterthatextractstheinterferencecausedbythebooststage.
ThepowerfactorcorrectionisperformedbytheL6562ATcontroller,asmallandlow-costcomponentthatoperatesoverthewidetemperaturerangerequiredforexternalapplications.
Stage2:ResonantconverterTheL6599ATcontrollerperformstheactivefunctioninthebuckconverter.
Itcomprisesallthefunctionsrequiredforthecorrectregulationoftheresonantconverter.
Ithasaconstantdutycycleof50percentandusesthefrequencyasthecontrolparameter.
Anintegratedmagneticapproachwithaseriesinductorisusedinthetransformer,thusobviatinganexternalinductorforgeneratingtheresonance.
ThechoiceforthesecondarywindingwasatransformerconfigurationwithcentertappingandSchottkypowerrectifiersofSTPS10150CGtype.
EPCOSfilmcapacitorswitharatingof4.
7F/63Varealsousedhereforsmoothing.
AsmallLCfilterthatsuppressestheRFripplecompletestheoutputpart.
Theoutputvoltageisregulatedandstabilizedviaafeedbacknetwork.
Figure2showsthecompletecircuitdiagramofthepowersupply,andthematerialsarelistedinTable1.
Figure2:CompletecircuitdiagramoftheLEDpowersupplyApplications&Cases2/EPCOSAG·ATDKGroupCompany·Edition2015·www.
epcos.
comTable1:MateriallistofTDK-EPCproductsEfficiencymeasurementTable2showstheoverallefficiencydeterminedatanAClinevoltageof230V/50Hzand115V/60Hzwithvariousloads.
Atavoltageof115Vandfullload,theoverallefficiencyis90.
96percent,risingto93.
39percentat230V.
Iftheefficiencyismeasuredat25,50,75and100percentloadtotheES-2standardandthemeanefficiencyiscalculated,theresultis91.
04percentat230Vand89.
52percentat115V.
ThismeansthattheconvertercanoperateatahighefficiencynotonlyatfullloadbutalsoatthelowerloadstypicalofstronglydimmedLEDs.
Table2:EfficienciesatvariousloadsReferenceValue,TypeDimensions(WxH);RM[mm],EIAformDescription,orderingcodesC2470nF-X29.
0x18.
0;15MKP,B32922C3474K000C3470nF-X29.
0x18.
0;15MKP,B32922C3474K000C4470nF-X29.
0x18.
0;15MKP,B32922C3474K000C55F14x31.
5;27.
5MKP,800V,B32774D8505K000C65F14x31.
5;27.
5MKP,800V,B32774D8505K000C75F14x31.
5;27.
5MKP,800V,B32774D8505K000C101F1206MLCC,50V,X7R,C3216X7R1H105KTC1310F1210MLCC,25V,X7R,C3225X7R1E106MC174.
7F7.
8x7.
8;5MKT,63V,B32529D0475M000C184.
7F7.
8x7.
8;5MKT,63V,B32529D0475M000C2015nF5x18;15MKP,1000V,B32652A0153K000C244.
7F0805MLCC,6.
3V,X5R,C2012X5R0J475KTC25470pF0805MLCC,50V,COG,C2012C0G1H471JTC3010F1210MLCC,25V,X7R,C3225X7R1E106KTC4010F2220MLCC,50V,X7R,C5750X7R1H106MRV1300VAC15x5;(DxW),7.
5Metaloxidevaristor,B72214S0301K101230V,50Hz115V,60HzTestconditionsVout[V]Iout[A]Pout[W]Pin[W]η[%]Vout[V]Iout[A]Pout[W]Pin[W]η[%]25%load47.
580.
68932.
837.
8786.
5747.
590.
68932.
837.
8786.
5850%load47.
571.
37865.
671.
6691.
4847.
581.
37865.
672.
9389.
9075%load47.
562.
00895.
5102.
9692.
7547.
562.
00195.
2105.
090.
64100%load47.
552.
708128.
8137.
693.
3847.
562.
703128.
6141.
3390.
96Meanefficiency91.
0489.
52Applications&Cases3/EPCOSAG·ATDKGroupCompany·Edition2015·www.
epcos.
com
台湾云服务器去哪里买?国内有没有哪里的台湾云服务器这块做的比较好的?有很多用户想用台湾云服务器,那么判断哪家台湾云服务器好,不是按照最便宜或最贵的选择,而是根据您的实际使用目的选择服务器,只有最适合您的才是最好的。总体而言,台湾云服务器的稳定性确实要好于大陆。今天,云服务器网(yuntue.com)小编来介绍一下台湾云服务器哪里买和一年需要多少钱!一、UCloud台湾云服务器UCloud上市云商,...
SpinServers服务商也不算是老牌的服务商,商家看介绍是是2018年成立的主机品牌,隶属于Majestic Hosting Solutions LLC旗下。商家主要经营独立服务器租用和Hybrid Dedicated服务器等,目前包含的数据中心在美国达拉斯、圣何塞机房,自有硬件和IP资源等,商家还自定义支持用户IP广播到机房。看到SpinServers推出了美国独服的夏季优惠促销活动,最低月...
hypervmart怎么样?hypervmart是一家国外主机商,成立于2011年,提供虚拟主机、VPS等,vps基于Hyper-V 2012 R2,宣称不超售,支持linux和windows,有荷兰和英国2个数据中心,特色是1Gbps带宽、不限流量。现在配置提高,价格不变,性价比提高了很多。(数据中心不太清楚,按以前的记录,应该是欧洲),支持Paypal付款。点击进入:hypervmart官方网...
lamp为你推荐
电信主机租用电信云主机是什么业务?域名代理怎样通过卖域名赚钱?租服务器我想租服务器,请问会提供哪些服务?asp主机如何用ASP代码实现虚拟主机国外域名注册国外注册域名种类这么多,我们要怎么选择?域名服务域名服务有何作用?如何设置?域名服务商买域名,一定要选择好的服务商台湾vps哪个地区的VPS从大陆访问快呢。域名申请申请域名需要哪些流程具体点 谢谢100m网站空间50M的网页内容买100M的网站空间够用了没?
hostigation 淘宝抢红包攻略 t楼 新加坡服务器 商家促销 个人空间申请 电子邮件服务器 php空间推荐 169邮箱 世界测速 如何安装服务器系统 爱奇艺会员免费试用 最漂亮的qq空间 视频服务器是什么 西安服务器托管 免费ftp 监控服务器 wordpress中文主题 买空间网 七牛云存储 更多