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agq300-48s1v2 dc/dc converter trn document no.: 31020734 october 29, 2009 rev 1.4 agq300-48s1v2 dc/dc converter technical reference notes industrystandardquarterbrick:36v~75vinput,1.2 vsingleoutput industrystandardquarterbrick(openframe) 2.281.450.4(openframe) 2.281.450.5(withbaseplate) options ? choiceofpositivelogicornegativelogic forcntfunction ? choiceofshortpinsorlongpins description agq30048s1v2isanewopenframedc/dcconverterf oroptimumefficiencyandpowerdensity. agq30048s1v2 is an industry standard quarter brick , which makes it an ideal choice for small space,highcurrentandlowvoltageapplications.t hepackagesizeis57.9mm36.8mm10.1mm (2.281.450.4)foropenframeand57.9mm 36.8mm12.7mm(2.281.450.5)with baseplate, and standardpinout configuration provid es cntand trimfunctions. agq30048s1v2 canprovide1.2@60asingleoutputthatisisolated frominputs.themodulecanachieveultrahigh efficiency,formostapplicationsaheatsinkisnot required. features ? industry standard quarter brick ? basic isolation ? ultra high efficiency ? improved thermal performance ? high power density ? low output noise ? industry standard pinout ? 2:1 wide input voltage of 36v ~ 75v ? cnt function ? remote sense ? trim function ? over-temperature protection ? output over-current protection (hiccup) ? output over-voltage protection (hiccup) ? rohs compliant
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn module numbering
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn electrical specifications unlessotherwiseindicated,specificationsapplyov eralloperatinginputvoltageandtemperature conditions.standardtestconditiononasingleuni tisasfollows: tc(board): 25c +v in : 48v 2% v in : returnpinfor+v in cnt: connecttov in fornegativelogic openforpositivelogic +v out : connecttoload v out : connecttoload(return) +sense: connectto+v out sense: connecttov out trim(vadj): open inputspecifications parameter symbol min typ max unit operatinginputvoltage v i 36 48 75 vdc maximuminputcurrent (v i =0tov i,max ,i o =i o,max ) i i,max 2.5 a inputreflectedripplecurrent (ratedinputandoutput) i i 10 20 mapp supplyvoltagerejection(120hz) 50 60 db caution:thispowermoduleisnotinternallyfused. aninputlinefusemustalwaysbeused.
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn absolutemaximumratings stressesinexcessoftheabsolutemaximumratings cancausepermanentdamagetothedevice. theseareabsolutestressratingsonly.functional operationofthedeviceisnotimpliedattheseor anyotherconditionsinexcessofthosegiveninth eoperationalsectionsoftheips.exposureto absolutemaximumratingsforextendedperiodscana dverselyaffectdevicereliability. parameter symbol min typ max unit continuous v i 80 vdc inputvoltage transient(100ms) v i,trans 100 vdc operatingambienttemperature (see thermal consideration ) ta 40 85 oc operatingboardtemperature tc oc storagetemperature t stg 55 125 oc operatinghumidity 5 95 rh% basicinputoutputisolation 2000 vdc outputpower p o,max 72 w outputripple&noise (ta:25c,airvelocity:200lfm,v in :48v,v o,nom , i o,nom ,10tantalum(esr100m)/1uceramic capacitor) 100 mvpp (f<20mhz) outputripple&noise(wholerange) 100 mvpp (f<20mhz)
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn outputspecifications parameter symbol min typ max unit externalloadcapacitance 470 30000 f outputvoltagesetpoint(v i =v i,min tov i,max :i o =i o,max ; ta=25oc) v o,set 1.18 1.2 1.22 vdc line 3 5 mv load 5 10 mv outputregulation temperature(wholerange) 0.02 %vo/oc ratedoutputcurrent i o 0 60 a outputcurrentlimitinception(hiccup) i o 66 84 a board foropenframe 110 120 135 oc overtemperature protection (autorecovery) hysteresis foropenframe 5 oc efficiency(v i =v i,nom ;i o,max ;ta=25 c) 85 % outputspecifications(cont) parameter symbol min typ max unit 25%i o,nom stepfrom50%i o,nom ,0.1a/s 90 400 mv s 75%i o,nom stepfrom50%i o,nom ,0.1a/s 140 mv dynamicresponse: (v i =v i,nom ;ta=25 c; additional470f loadcapacitor) 10%i o,nom to100%i o,nom ,0.1a/s 200 mv turnontime(i o =i o,max ;v o within1%) 10 20 ms outputvoltageovershoot(i o =i o,max ;ta=25 c) 5 %v o switchingfrequency 300 khz
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn featurespecifications parameter symbol min typ max unit logiclow 0.7 1.2 v enablepinvoltage logichigh 3.5 12 v logiclow 1.0 ma enablepincurrent logichigh (leakagecurrent,@10v) a outputvoltagetrimrange 80 110 %v o isolationcapacitance pf isolationresistance 10 m calculatedmtbf (v in :48v,load:i o,nom ,board@25oc) 2000000 hours weight(openframe) 28 g(oz.) vibration(sinewave) vibrationlevel:3.5mm(2hz~9hz),10m/s 2 (9hz~ 200hz),15m/s 2 (200hz~500hz) directionsandtime:3axes(x,y,z),30mineach sweepvelocity:1oct/min shock(halfsinewave) peakacceleration:300m/s 2 durationtime:6ms continuousshock3timesateachof6directions( x,y,z)
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn characteristic curves 50 55 60 65 70 75 80 85 90 95 100 0 10 20 30 40 50 60 outputcurrent(a) efficiency(%) vin=36v vin=48v vin=75v figure1 agq300typicalefficiency figure 2 agq300 transient response to step in load figure 3 agq300 transient response to step in load from25%~50%~25% ( io/ t=0.1a/1s) from10%~100%~10% ( io/ t=0.1a/1s) figure4 agq300typicalstartupfrompoweron figure5 agq300typicalstartupfrompoweron ch1=vout,ch2=cnt ch1=vout,ch2=vin
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn feature description cntfunction twocntlogicoptionsareavailable.thecnt logic, cnt voltage and the module working stateareaslistedinthefollowingtable. l h open n on off off p off on on n:negativelogic p:positivelogic l:lowvoltage,0.7vl1.2v h:highvoltage,3.5vh12v on:moduleison off:moduleisoff open:cntpinisleftopen note:normally,vcnt12v. the following figure shows a few simple cnt circuits. cnt vin cnt vin simplecontrol transistorcontrol cnt vin cnt vin isolatedcontrol relaycontrol figure6 cntcircuit remotesense agq30048s1v2 can remotely sense both lines of its output which moves the effective outputvoltageregulationpointfromtheoutput terminalsoftheunittothepointofconnection of the remote sense pins. this feature automaticallyadjuststherealoutputvoltageof agq30048s1v2 in order to compensate for voltage drops in distribution and maintain a regulatedvoltageatthepointofload. when the converter is supporting loads far away, or is used with undersized cabling, significant voltage drop can occur at the load. the best defense against such drops is to locate the load close to the converter and to ensure adequately sized cable is used.when this is not possible, the converter can compensateforadropofupto10%v o ,through useofthesenseleads. when used, the +sense and sense leads shouldbeconnectedfromtheconvertertothe point of load as shown in figure 7, using twisted pair wire, or parallel pattern to reduce noiseeffect.theconverterwillthenregulateits outputvoltageatthepointwheretheleadsare connected. care should be taken not to reverse the sense leads. if reversed, the converter will trigger overvoltage protection (ovp). when not used, the +sense lead must be connected with +v o , and sense with vo. although the output voltage can be increased by both the remote sense and the trim, the maximumincreasefortheoutputvoltageisnot thesumofboth. the maximum increase is the larger of either theremotesenseorthetrim. note that at elevated output voltages the maximumpowerratingofthemoduleremains thesame,andtheoutputcurrentcapabilitywill decreasecorrespondingly. vo +vo load +sense sense twistedpair +s s figure7 senseconnections
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn trim the +v o output voltage of agq30048s1v2 can be trimmed using the trim pin provided. applying a resistor to the trim pin through a voltage divider from the output will cause the +v o output to increase by up to 10% or decreasebyupto20%.trimmingupbymore than 10% of the nominal output may activate the ovp circuit or damage the converter. trimmingdownmorethan20%cancausethe convertertoregulateimproperly.ifthetrimpin isnotneeded,itshouldbeleftopen. trim up with an external resistor connected between the trim and +sense pins, the output voltage setpointincreases(seefigure8). +vin cnt vin +vo +sense trim sense vo r adj_ up r load figure8 trimupcircuit thefollowingequationdeterminestherequired externalresistor value to obtain a percentage outputvoltagechangeof%. ( ) ) ( 49. 33 1. 1299 6.0 100 769 .9 ? ? + = ? k v r nom up adj note: =(vo vnom) % 100/vnom trim down withanexternalresistorbetweenthetrimand sense pins, the output voltage set point decreases(seefigure9). +vin cnt vin +vo +sense trim sense vo r adj_ down r load figure9 trimdowncircuit thefollowingequationdeterminestherequired externalresistor value to obtain a percentage outputvoltagechangeof%. ) ( 49. 33 1. 1299 ? = ? k r down adj note: =(vnomvo) % 100/vnom although the output voltage can be increased by both the remote sense and the trim, the maximumincreasefortheoutputvoltageisnot thesumofboth.themaximumincreaseisthe largerofeithertheremotesenseorthetrim. note that at elevated output voltages the maximumpowerratingofthemoduleremains thesame,andtheoutputcurrentcapabilitywill decreasecorrespondingly. minimumloadrequirements there is no minimum load requirement for agq30048s1v2. outputcapacitance high output current transient rate of change (high di/dt) loads may require high values of outputcapacitancetosupplytheinstantaneous energy requirement to the load. to minimize the output voltage transient drop during this transient, low equivalent series resistance (esr)capacitorsmayberequired,sinceahigh esr will produce a correspondingly higher voltagedropduringthecurrenttransient.
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn whentheloadissensitivetorippleandnoise, an output filter can be added to minimize the effects. a simple output filter to reduce output rippleandnoisecanbemadebyconnectinga capacitor c1 across the output as shown in figure 10. the recommended value for the outputcapacitorc1is470f. vo +vo load c1 figure10 outputripplefilter vo +vo load c1 c2 figure11 outputripplefilterforadistantload extracareshouldbetakenwhenlongleadsor traces are used to provide power to the load. long lead lengths increase the chance for noise to appear on the lines. under these conditions c1 can be added across the load, with a 1f ceramic capacitor c2 in parallel generallyasshowninfigure11. decoupling noise on the power distribution system is not always created by the converter. high speed analog or digital loads with dynamic power demands can cause noise to cross the power inductorbackontotheinputlines.noisecanbe reducedbydecouplingtheload.inmostcases, connecting a 10f tantalum or ceramic capacitor in parallel with a 0.1f ceramic capacitoracrosstheloadwilldecoupleit.the capacitorsshouldbeconnectedasclosetothe loadaspossible. groundloops groundloopsoccurwhendifferentcircuitsare given multiple paths to common or earth ground,asshowninfigure12.multipleground points have slightly different potential and causecurrentflowthroughthecircuitfromone point to another. this can result in additional noise in all the circuits. to eliminate the problem, circuits should be designed with a single ground connection as shown in figure 13. vo +vo load load r line r line r line r line r line r ground loop line figure12 groundloops vo +vo load load r line r line r line r line r line figure13 singlepointground outputovercurrentprotection agq30048s1v2 features foldback current limiting as part of their overcurrent protection (ocp) circuits. when output current exceeds 110% to 140% of the rated current, such as duringashortcircuitcondition,themodulewill shutdownandattempttorestartnormallyafter about500ms.
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn outputovervoltageprotection the output overvoltage protection consists of circuitrythatmonitorsthevoltageontheoutput terminals.ifthevoltageontheoutputterminals exceeds the over voltage protection threshold (120%~140% of the nominal output voltage), the module will shut down and attempt to restartnormallyafterabout500ms. overtemperatureprotection these modules feature an overtemperature protection circuit to safeguard against thermal damage. the module will work on intermittent mode when the maximum device reference temperature is exceeded. when the overtemperature condition is removed, the converterwillautomaticallyrestart. inputreversevoltageprotection underinstallationandcablingconditionswhere reverse polarity across the input may occur, reverse polarity protection is recommended. protectioncaneasilybeprovidedasshownin figure 14. in both cases the diode used is rated for 10a/100v. placing the diode across the inputs rather than inline with the input offers an advantage in that the diode only conductsinareversepolaritycondition,which increases circuit efficiency and thermal performance. +vin vin +vin vin figure14 reversepolarityprotectioncircuit safetyconsideration for safetyagency approval of the system in which the power module is used, the power module must be installed in compliance with thespacingandseparationrequirementsofthe endusesafetyagencystandards,i.e.,ul1950 and en60950. agq30048s1v2 inputtooutput isolation is a basic insulation. thedc/dcpowermoduleshouldbeinstalled in enduse equipment, in compliance with the requirementsoftheultimateapplication,andis intended to be supplied by an isolated secondary circuit. when the supply to the dc/dc power module meets all the requirementsforselv(<60vdc),theoutputis considered to remain within selv limits (level 3). if connected to a 60vdc power system, double or reinforced insulation must be provided in the power supply that isolates the input from any hazardous voltages, including theacmains.oneinputpinandoneoutputpin aretobegroundedorboththeinputandoutput pinsaretobekeptfloating.singlefaulttesting in the power supply must be performed in combinationwiththedc/dcpowermoduleto demonstrate that the output meets the requirement for selv. the input pins of the modulearenotoperatoraccessible. note:donotgroundeitheroftheinputpinsof the module, without grounding one of the output pins. this may allow a nonselv voltage to appear between the output pin and ground. fusing agq30048s1v2 has no internal fuse. an external fuse must always be employed! to meet international safety requirements, a 250 volt rated fuse should be used. if one of the
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn inputlinesisconnectedtochassisground,then thefusemustbeplacedintheotherinputline. standard safety agency regulations require input fusing. recommended rating is 10a for agq30048s1v2. note:thefuseisfastblowtype. emc forconditionswhereemiisaconcern,adifferent inputfiltercanbeused.figure15showsthefilte r designedtoreduceemieffectsforagq30048s1v2. vin vin+ pe 1 11 dc/dc u1 gnd vi1 vi2 vo1 vo2 2 1 c1 3 4 dc/dc +vin vin cnt +vout +s trim s vout 2 1 3 12 87 46 5 c2 2 1 l1 2 3 cy pe vout vout+ u2 c3 2 12 1 21 1 4 figure15 emireductionfilter component value/rating type description price c1 100uf/100v aluminum electrolytic 08010262:alumcapacitor 100v100f20%10*20105crohs c2 470uf/10v aluminum electrolytic 08010373:alumcapacitor 10v470f20%10*12.5105c5000hrsrohs u1:5ainputfiltermodule dashedpartoutputfilter:notneeded thermal consideration technologies agq30048s1v2 has ultra high efficiency at full load. with less heat dissipation and temperatureresistant components such as ceramic capacitors, these modules exhibit goodperformanceduringprolongedexposure tohightemperatures.maintainingtheoperating board temperature within the specified range helps keep internal component temperatures within their specifications, which in turn helps keep mtbf from falling below the specified rating.propercoolingofthepowermodulesis also necessary for reliable and consistent operation.
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn thermal management measuring the board temperature of the moduleasthemethodshowninfigure16can verify the proper cooling. if the module has a baseplate, themeasurement location is at the centerofthebaseplate. 1 2 3 4 5 6 7 8 thermalmeasurementspot figure16 temperaturemeasurementspot the module should work under 70c ambient for the reliability of operation and the board temperature must not exceed 105c while operatinginthefinalsystemconfiguration.the measurement can be made with a surface probe after the module has reached thermal equilibrium.noheatsinkismounted,makethe measurement as close as possible to the indicated position. it makes the assumption that the final system configuration exists and canbeusedforatestenvironment.notethat theboardtemperatureofmodulemustalways becheckedinthefinalsystemconfigurationto verify proper operation due to the variation in test conditions. thermal management acts to transfer the heat dissipated by the module to the surrounding environment. the amount of powerdissipatedbythemoduleasheat(pd)is gotbytheequationbelow: pd=pipo where:piisinputpower;poisoutputpower; pdisdissipatedpower. also, module efficiency () is defined as the followingequation: =po/pi byeliminatingtheinputpowerterm,wecanget the equation below from the above two equations: pd=po(1)/ the module power dissipation then can be calculatedthroughtheequation. modulederating with48vinput,25 cambienttemperature,and 200lfm airflow, agq30048s1v2 is rated for full power. the board temperature should be usedtodeterminemaximumtemperaturelimits. the module cannot work continuously when the board temperature is over 100 c. the minimum operating temperature for agq30048s1v2is40 c.thederatingcurve for openframe is shown in figure 17 and the derating curve with baseplate is shown in figure18. increasing airflow over the module enhances heattransferviaconvection. the module is not designed to operate for a longtimewiththebaseplatetemperaturebeing above100c. 0 10 20 30 40 50 60 25 30 35 40 45 50 55 60 65 70 75 80 85 localambienttemperatureta( o c) outputcurrent(a) 0.5m/s 1m/s 1.5m/s 2m/s figure17 deratingcurveofthemodulefor openframe,airflowratefromvinto+vin
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn localambienttemperatureta( o c) outputcurrent(a) 0.5m/s 1.0m/s 1.5m/s 2.0m/s 0 10 20 30 40 50 60 25 30 35 40 45 50 55 60 65 70 75 80 85 figure18 deratingcurveofthemodulewith baseplate,airflowratefromCvinto+vin mtbf the mtbf, calculated in accordance with bellcoretrnwt000332,is2,500,000hours. obtaining this mtbf in practice is entirely possible.iftheboardtemperatureisexpected toexceed+25c,thenwealsoadvisetoorient themoduleforthebestpossiblecoolinginthe airstream. emerson network power can supply replacements for converters from other manufacturers, or offer custom solutions. pleasecontactthefactoryfordetails. mechanical considerations installation althoughagq30048s1v2canbemountedin anyorientation,freeairflowingmustbetaken. normallypowercomponentsarealwaysputat the end of the airflow path or have separate airflow paths. this can keep other system equipmentcoolerandincreasecomponentlife spans. note: 1. there should be no electrical connection between the case and the pe or any module ports. 2.thefixingscrewoftheheatsinkshouldnot be too long. please refer to the mechanical chartfordetail. soldering agq30048s1v2 is compatible with standard wave soldering techniques. when wave soldering, the converter pins should be preheated for 20~30 seconds at 110c, and wave soldered at 260c for less than 10 seconds. when hand soldering, the iron temperature shouldbemaintainedat425candappliedto the converter pins for less than 3 seconds. longerexposurecancauseinternaldamageto theconverter.cleaningcanbeperformedwith cleaningsolventipaorwithwater.
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn mechanical chart (top & side view) openframeproduct tolerances:x.xmm=+/0.5mm x.xxmm=+/0.25mm topview 36.8 ( 1.45 ) 15.24 ( 0.600 ) 12 3 59.9 [ 2.28 ] 50.8 [ 2.000 ] 7.62 [ 0.300 ] 15.24 [ 0.600 ] 87 6 5 4 6 1.0 0.10 6 2.0 ( 0.08 ) 2 1.5 0.10 10.1 ( 0.397 ) pinlengthoption devicecode suffix l 4 6 8 none 4.8mm+/0.5mm 3.8mm+/0.5mm 2.8mm+/0.25mm 5.8mm+/0.5mm l
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn baseplateproduct pinlengthoption 8 2.8mm+/0.25mm 5.8mm+/0.5mm none 4.8mm+/0.5mm 3.8mm+/0.5mm 6 4 devicecode suffix l topview 50.8 [ 2.000 ] 57.9 [ 2.28 ] 7.62 [ 0.300 ] 36.8 ( 1.45 ) 15.24 [ 0.600 ] 6 1.0 0.10 8 15.24 ( 0.600 ) 2 13 6 7 54 2 1.5 0.10 12.7 [ 0.50 ] 6 2.0 ( 0.08 ) tolerances:x.xmm=+/0.5mm x.xxmm=+/0.25mm pindesignations pin number function pin number function p1 vin(+) p5 sense p2 cnt p6 trim p3 vi() p7 +sense p4 vo() p8 vo(+)
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn ordering information model number input voltage (v) output voltage (v) output current (a) ripple and noise (mv pp) efficiency (%) typ. agq30048s1v24l 36~75 1.2 60 negative 85 agq30048s1v2p4l 36~75 1.2 60 positive 85 agq30048s1v2b4l 36~75 1.2 60 negative 85 agq30048s1v2pb4l 36~75 1.2 60 positive 85 agq30048s1v24y 36~75 1.2 60 negative 85
agq300-48s1v2 dc/dc converter trn http://www.emersonnetworkpower.com.cn ????? ????? ????? ????? ??? ??? ??? ??? ? ?? ? ? ? ? ? pb hg cd cr 6+ pbb pbde ?? ??????? sj/t-11363-2006 ? ??????? sj/t-11363-2006 ? ?????????? ?????? 2?????????????? 1 ?o? 2 ?? 3 ??? | r6 ? ????? ????? ????? ????? ??? ??? ??? ??? ? ?? ? ? ? ? ? pb hg cd cr 6+ pbb pbde ?? ??????? sj/t-11363-2006 ? ? ????? sj/t-11363-2006 ? ?????????? ?????? 2?????????????? 1 ?o ? 2 ?? 3 ??? | r5 ?

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