thecopyrightandauthorityfortheinterpretationoftheproductsarereservedby mornsun vra_ld-20wr2&vrb_ld-20wr2 2013.11.29-a/4 page1of9 features efficiencyupto90% 2:1wideinputvoltagerange outputovervoltage,overcurrentandinput undervoltageprotection,shortcircuitprotection 1.5kvdcisolation operatingtemperaturerange: -40 c~+85 c six-sidedmetalshield industrystandardpinout meetcispr22/en55022classa meeten60950 a2s chassismounting anda4s din-rail mounting havethefunctionofinputreverse connectionpreventing application vra_ld-20wr2&vrb_ld-20wr2seriesareappliedto widevoltagerangeinputsituationsuchasdatatransmission device,batterypowersupplydevice,telecommunicationdevice ,distributed power supply system, remote control system, industrialrobotsystemetc. vra_ld-20wr2 & vrb_ld-20wr2series 20w, wideinput,isolated®ulated dual/single outputdc-dcconverter patentprotected rohs partnumbersystem vra1205ld-20wr2 rated power package style output voltage input voltage product series selectionguide approval model input voltage(vdc) output voltage (vdc) outputcurrent (ma) inputcurrent(ma)(typ.) reflected ripple current (ma,typ.) max. capacitive load ( f) efficiency (%,typ.) @max. load nominal (range) max. max. min. @max. load @noload ce vra1205ld-20wr2 12 (9-18) 20 5 2000 100 1938 30 30 4800 86 vra1212ld-20wr2 12 834 42 1895 25 800 88 vra1215ld-20wr2 15 667 33 1895 25 500 88 vra1224ld-20wr2 24 417 21 1895 20 300 88 vrb1203ld-20wr2 3.3 5000 250 1600 65 18700 86 vrb1205ld-20wr2 5 4000 200 1872 60 9600 89 vrb1212ld-20wr2 12 1667 84 1872 25 1600 89 vrb1215ld-20wr2 15 1333 67 1872 25 1000 89 vrb1224ld-20wr2 24 834 42 1853 30 470 90 vra2405ld-20wr2 24 (18-36) 40 5 2000 100 969 25 4800 86 vra2412ld-20wr2 12 834 42 948 20 800 88 vra2415ld-20wr2 15 667 34 948 20 500 88 vra2424ld-20wr2 24 417 21 948 20 300 88 vrb2403ld-20wr2 3.3 5000 250 800 40 18700 86 vrb2405ld-20wr2 5 4000 200 926 40 9600 90 vrb2412ld-20wr2 12 1667 84 937 20 1600 89 vrb2415ld-20wr2 15 1333 67 926 20 1000 90 VRB2424LD-20WR2 24 834 42 916 20 470 90
thecopyrightandauthorityfortheinterpretationoftheproductsarereservedby mornsun vra_ld-20wr2&vrb_ld-20wr2 2013.11.29-a/4 page2of9 ce vra4805ld-20wr2 48 (36-75) 80 5 2000 100 484 20 30 4800 86 vra4812ld-20wr2 12 834 42 474 15 800 88 vra4815ld-20wr2 15 667 34 468 15 500 89 vra4824ld-20wr2 24 417 21 468 15 300 89 vrb4803ld-20wr2 3.3 5000 250 400 25 18700 86 vrb4805ld-20wr2 5 4000 200 463 25 9600 90 vrb4812ld-20wr2 12 1667 84 469 10 1600 89 vrb4815ld-20wr2 15 1333 67 463 10 1000 90 vrb4824ld-20wr2 24 834 42 468 10 470 89 note: serieswithsuffix h areheatsinkmounting;serieswithsuffix a2s arechassismounting withsuffix a4s aredin-railmounting,forexamplevrb2405ld- 20whr2a2sischassismountingofwithheatsink,vrb2405ld-20wr2a4sisdin-railmountingofwithoutheatsink;iftheapplicationhasahigher requirementforheatdissipation,youcanchoosemoduleswithheatsink; absolutemaximumratingwithoutdamageontheconverter; fordual-output-convertersthegivenvalueisforoneoutput(forbothoutputsthesamevalue); theefficiencyof"a2s"and"a4s"isapprox.2%lowerfortheprotectionofinversepolarity. input specifications item testconditions min. typ. max. unit inputsurgevoltage(1sec.max.) 12vdcinput -0.7 -- 25 vdc 24vdcinput -0.7 -- 50 48vdcinput -0.7 -- 100 start-upvoltage 12vdcinput -- -- 9 24vdcinput -- -- 17.8 48vdcinput -- -- 35.8 undervoltageshutdown 12vdcinput 7.5 -- -- 24vdcinput 16 -- -- 48vdcinput 32 -- -- start-uptime nominalinput&constantresistanceload -- 10 -- ms ctrl* modelson ctrlopenorconnectttlhighlevel(2.5-12vdc) modelsoff ctrlconnectgndorlowlevel(0-1.2vdc) inputcurrent(modelsoff) -- 1 -- ma inputfilter pifilter note:*thectrlcontrolpinvoltageisrefertognd. output specifications item testconditions min. typ. max. unit positivevoltageaccuracy -- 1 3 % negativevoltageaccuracy outputvoltagebalance dualoutput,balancedloads -- 0.5 1 lineregulation fullload,inputvoltagefromlowtohigh -- 0.2 0.5 loadregulation 10%to100%load -- 0.5 1 crossregulation dualoutput,mainoutput50%load, supplementoutputfrom10%to100%load -- -- 5 transientrecoverytime 25%loadstepchange -- 300 500 s transientresponsedeviation -- 3 5 % temperaturedrift fullload -- 0.02 -- %/ c ripple&noise* 20mhzbandwidth -- 70 100 mvp-p trim -- 10% -- vdc outputovervoltageprotection 3.3vdcoutput -- 3.9 -- 5vdcoutput -- 6.2 -- 12vdcoutput -- 15 -- 15vdcoutput -- 18 -- 24vdcoutput -- 30 -- overcurrentprotection inputvoltagerange -- 150 -- % shortcircuitprotection hiccup,continuous,automaticrecovery note:*rippleandnoisetestedby parallelcable method.seedetailedoperationinstructionsat dc-dcapplicationnotes.
thecopyrightandauthorityfortheinterpretationoftheproductsarereservedby mornsun vra_ld-20wr2&vrb_ld-20wr2 2013.11.29-a/4 page3of9 common specifications item testconditions min. typ. max. unit isolationvoltage input-output,testedfor1minute,leakagecurrentlessthan1ma 1500 -- -- vdc isolationresistance input-output,testat500vdc 1000 -- -- m isolationcapacitance input/output,100khz/0.1v -- 1000 -- pf switchingfrequency pwmmode -- 300 -- khz mtbf mil-hdbk-217f@25 1000 -- -- khours safetyapprovals en60950 casematerial aluminumalloy size pcbmounting withoutheatsink 50.80 25.40 11.80 mm pcbmounting withheatsink 50.80 25.40 16.30 a2schassismounting withoutheatsink 76.00 31.50 21.20 a2schassismounting withheatsink 76.00 31.50 25.10 a4sdin-railmounting withoutheatsink 76.00 31.50 25.80 a4sdin-railmounting withheatsink 76.00 31.50 29.70 weight withoutheatsink withoutheatsink -- 28 -- g withheatsink withheatsink -- 36 -- a2schassismounting withoutheatsink -- 50 -- a2schassismounting withheatsink -- 58 -- a4sdin-railmounting withoutheatsink -- 70 -- a4sdin-railmounting withheatsink -- 78 -- environmentalspecifications item testconditions min. typ. max. unit storagehumidity noncondensing 5 -- 95 % operatingtemperature seetemperaturederatingcurve(figure3) -40 -- 85 c storagetemperature -55 -- 125 themax.casetemperature operatingtemperaturecurverange -- -- 105 leadtemperature 1.5mmfromcasefor10seconds -- -- 300 cooling freeairconvection shake 10-55hz,10g,30min.alongx,yandz emcspecifications emi ce cispr22/en55022 classa withoutexternalcircuit /classb externalcircuitrefertofigure1- ? re cispr22/en55022 classa withoutexternalcircuit /classb externalcircuitrefertofigure1- ? ems esd iec/en61000-4-2 contact 4kv perf.criteriab rs iec/en61000-4-3 10v/m perf.criteriaa eft iec/en61000-4-4 2kv (externalcircuitrefertofigure1- ) perf.criteriab surge iec/en61000-4-5 2kv (externalcircuitrefertofigure1- ) perf.criteriab cs iec/en61000-4-6 3vr.m.s perf.criteriaa voltagedips,shortand interruptionsimmunity iec/en61000-4-29 0%-70% perf.criteriab emcrecommendedcircuit ldm2 c0 tvs ldm1 mov fuse c1 v in gnd + vin gnd +vo -vo (0v) eut load cy1 cy2 (figure1) note:1.infigure1,part isemsrecommendedexternalcircuit,part is emi recommended external circuit(class b). choose according to requirements; 2.ifthereisnorecommendedparameters,themodelnorequiretheexternal component. re commendedexternalcircuitparameters: model vin:12v vin:24v vin:48v fuse chooseaccordingtopracticalinputcurrent mov -- s14k35 s14k60 ldm1 -- 56 h tvs smcj28a smcj48a smcj90a c0 680 f/25v 330 f/50v 330 f/100v c1 1 f/50v 1 f/50v 1 f/100v ldm2 4.7 h cy1 cy2 1nf/2kv
thecopyrightandauthorityfortheinterpretationoftheproductsarereservedby mornsun vra_ld-20wr2&vrb_ld-20wr2 2013.11.29-a/4 page4of9 emcrecommendedcircuitpcblayout (figure2) note:thepadspacebetweeninputandoutput(cy1/cy2)must 2mm. emctestwaveform(classbapplycircuit) vra2405ld-20wr2 ce(positiveline) vra2405ld-20wr2 ce(negativeline) vra4815ld-20wr2 ce(positiveline) vra4815ld-20wr2 ce(negativeline) vra2405ld-20wr2 re(horizontal) vra2405ld-20wr2 re(vertical) vra4815ld-20wr2 re(horizontal) vra4815ld-20wr2 re(vertical)
thecopyrightandauthorityfortheinterpretationoftheproductsarereservedby mornsun vra_ld-20wr2&vrb_ld-20wr2 2013.11.29-a/4 page5of9 vrb2405ld-20wr2 ce(positiveline) vrb2405ld-20wr2 ce(negativeline) vrb4815ld-20wr2 ce(positiveline) vrb4815ld-20wr2 ce(negativeline) vrb2405ld-20wr2 re(horizontal) vrb2405ld-20wr2 re(vertical) vrb4815ld-20wr2 re(horizontal) vrb4815ld-20wr2 re(vertical) product typical curve temperaturederatingcurve 0 20 40 60 80 100 120 -40 0 40 80 120 85 operating temp( c) o u t p u t p o w e r p e r c e n t ( % ) withoutheatsink with heatsink safe operating area 65 (figure3) efficiency vs input voltage curve (full load) 50 55 60 65 70 75 80 85 90 95 100 9101112131415161718 input voltage(v) efficiency(%) vra1205ld-20wr2 vrb1205ld-20wr2 30 40 50 60 70 80 90 100 5102030405060708090100 efficiency(%) total output current (%) efficiency vs output load curve (vin=vin-nominal) vra 1205 ld - 20 wr 2 vrb 1205 ld - 20 wr 2
thecopyrightandauthorityfortheinterpretationoftheproductsarereservedby mornsun vra_ld-20wr2&vrb_ld-20wr2 2013.11.29-a/4 page6of9 efficiency vs input voltage curve (full load) 50 55 60 65 70 75 80 85 90 95 100 18202224262830323436 input voltage(v) efficiency(%) vra2405ld-20wr2 vrb2405ld-20wr2 30 40 50 60 70 80 90 100 5102030405060708090100 efficiency(%) total output current (%) efficiency vs output load curve (vin=vin-nominal) vra2405ld-20wr2 vrb2405ld-20wr2 pcbmountingoutlinedimensions,recommendedfootprint(withoutheatsink) pcbmountin goutlinedimensions(withheatsink)
thecopyrightandauthorityfortheinterpretationoftheproductsarereservedby mornsun vra_ld-20wr2&vrb_ld-20wr2 2013.11.29-a/4 page7of9 vra_ld-20wr2a2s&vrb_ld-20wr2a2schassismountingoutlinedimensions footprintdetails pin 1 2 3 4 5 6 dual ctrl gnd vin -vo 0v +vo single ctrl gnd vin 0v trim +vo vra_ld-20whr2a2s&vrb_ld-20whr2a2schassismountingoutlinedimensions footprintdetails pin 1 2 3 4 5 6 dual ctrl gnd vin -vo 0v +vo single ctrl gnd in 0v trim +vo vra_ld-20wr2a4s&vrb_ld-20wr2a4sdin-railmountingoutlinedimensions itishangedonthets35rail footprintdetails pin 1 2 3 4 5 6 dual ctrl gnd vin -vo 0v +vo single ctrl gnd vin 0v trim +vo
thecopyrightandauthorityfortheinterpretationoftheproductsarereservedby mornsun vra_ld-20wr2&vrb_ld-20wr2 2013.11.29-a/4 page8of9 vra_ld-20whr2a4s&vrb_ld-20whr2a4sdin-railmountingoutlinedimensions din-railmodulesarefittingtots35rails footprintdetails pin 1 2 3 4 5 6 dual ctrl gnd vin -vo 0v +vo single ctrl gnd vin 0v trim +vo packagediagram specialpackageseries a2s/a4s testconfigurations inputreflected-ripplecurrenttestsetup inputreflected-ripplecurrentismeasuredwithaninductorlinandcapacitorcintosimulatesourceimpedance. dc cin lin dc load oscilloscope current probe lin(4.7 h) cin(220 f,esr<1.0 at100khz) trimapplication&trimresistance applicationcircuitfortrim(partinbrokenlineistheinteriorofmodels ) 0v r 2 r 1 r 3 v ref r t trim +vo 0v r 2 r 1 r 3 v ref r t trim +vo trim up trim down formulaforresistanceoftrim up: a= vref vo -vref r 1 r= t ar 2 r-a 2 -r 3 down: a= vref vo -vref r 2 r= t ar 1 r-a 1 -r 3 note:leaveopenifnotused.valueforr1,r2,r3,andv ref refertotheabove(table1).r t :resistanceoftrim.a:user-definedparameter,no actualmeanings.vo :thetrimup/downvoltage.
thecopyrightandauthorityfortheinterpretationoftheproductsarereservedby mornsun vra_ld-20wr2&vrb_ld-20wr2 2013.11.29-a/4 page9of9 note: 1.min.loadshouldn'tbelessthan5%,otherwiseripplemaybeincreaseddramatically,iftheproductoperatesundermin.load,itmaynotbe guaranteedtomeetallspecificationlisted.operationunderminimumloadwillnotdamagetheconverter. 2.recommendeddualoutputmodelsunbalancedload: 5%,iftheproductoperates> 5%,itmaynotbeguaranteedtomeetallspecification listed,pleasecontactourtechnicalpersonformoredetail. 3.max.capacitiveloadistestedatnominalinputvoltageandfullload. 4.allspecificationsmeasuredatta=25 c,humidity<75%,nominalinputvoltageandratedoutputloadunlessotherwisespecified. 5.inthisdatasheet,allthetestmethodsofindicationsarebasedonourcorporatestandards. 6.allcharacteristicsareforlistedmodel,non-standardmodelsmayperformdifferently,pleasecontactourtechnicalpersonformoredetail. 7.contactusforyourspecificrequirement. 8.specificationsofthisproductaresubjecttochangeswithoutpriornotice. mornsunscience&technologyco.,ltd. address:no.5,kehuist.1,kehuidevelopmentcenter,scienceave.,guangzhousciencecity,luogangdistrict,guangzhou,p.r.china. tel:86-20-38601850 fax:86-20-38601272 e-mail:info@mornsun.cn http://www.mornsun-power.com (table1) vo parameter 3.3(vdc) 5(vdc) 12(vdc) 15(vdc) 24(vdc) r1(k ) 4.801 2.883 10.971 14.497 24.872 r2(k ) 2.863 2.864 2.864 2.864 2.863 r3(k ) 15 10 17.8 17.8 20 vref(v) 1.24 2.5 2.5 2.5 2.5 designconsiderations recommendedcircuit allthevra_ld-20wr2&vrb_ld-20wr2serieshavebeentestedaccordingtothefollowingrecommendedtestingcircuitbeforeleaving factory(seefigure3). ifyouwanttofurtherdecreasetheinput/outputripple,youcanincreaseacapacitanceproperlyorchoosecapacitorswithlowesr,butthe greatestcapacitanceofitsfiltercapacitormustlessthanthemax.capacitiveload.therecommendedcapacitanceofitsfiltercapacitorsees (table2). dc dc vin gnd +vo 0v cin cout vin gnd +vo 0v cin cout dc dc -vo cout dual output single output (figure3) externalcapacitortable(table2) note: # foreachoutput. itisnotrecommendedtoincreasetheoutputpowercapabilitybyconnectingtwoormoreconvertersinparallel.theproductisnothot- swappable single vout (vdc) cout ( f) cin ( f) dual vout (vdc) cout # ( f) cin ( f) 3.3/5 470 100 5 220 100 12/15 220 12/ 15 100 24 100 24 47
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