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SMHF2805S bảng dữ liệu(PDF) 1 Page - Interpoint Corporation Company |
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SMHF2805S bảng dữ liệu(HTML) 1 Page - Interpoint Corporation Company |
1 / 15 page Features • FullyqualifiedtoClassHorK • -55°Cto+125°Coperation • 16to40VDCinput • FullyIsolated • Radhardoptocouplerfeedback • Fixedfrequency,550kHztypical • Topology–SingleEndedForward • Transientprotection50V/120ms • Inhibitfunction • Syncfunction • Indefiniteshortcircuitprotection • Undervoltagelockout • Upto82%efficiency description TheSMHFSeries™of28VDC/DCconvertersoffersawide inputvoltagerangeof16to40voltsandupto15wattsof outputpower.Theunitsarecapableofwithstandingshortterm transientsupto50volts.Thepackageisahermeticallysealed, projection-weldedmetalcase.Flangedandnon-flangedmodels areavailable. Screening SMHFconvertersofferscreeningoptionstoSpacePrototype(O), ClassH,orClassK.RadiationtoleranttoRadiationHardness Assurance(RHA)levelsof“-”(O)or“R”,perMIL-PRF-38534. Interpointmodelnumbersusean“O”intheRHAdesignatorposi- tiontoindicatethe“-”(dash)RadiationHardnessAssurancelevel ofMIL-PRF-38534,whichisdefinedas“noRHA”.See“ClassH andK,MIL-PRF-38534Screening”tablesformoreinformation. converter DeSign TheSMHFconvertersareswitchingregulatorsthatuseaquasi- squarewave,single-endedforwardconverterdesignwitha constantswitchingfrequencyof550kHz.Isolationbetweeninput andoutputcircuitsisprovidedwithatransformerintheforward pathandatemperaturecompensatedopto-couplerinthefeed- backcontrolloop.Theopto-couplerisradiationhardenedandis especiallyselectedforspaceapplications. FortheSMHFdualoutputmodels,crossregulationismaintained bytightlycoupledoutputmagnetics.Upto70%ofthetotaloutput powerisavailablefromeitheroutput,providingtheopposite outputissimultaneouslycarrying30%ofthetotaloutputpower. Predictablecurrentlimitisaccomplishedbydirectlymonitoring theoutputloadcurrentandprovidingaconstantcurrentoutput abovetheoverloadpoint. HigHer Power DenSity TheSMHFSeriesoffersanewstandardofperformanceforsmall sizeandhighpowerdensity.Atjust0.33inchhighandatotal footprintof1.7in2,thislowprofilepackageoffersatotalpower densityofupto30wattspercubicinch. Low noiSe, HigH AuDio rejection TheSMHFconverter’sfeed-forwardcompensationsystem providesexcellentdynamicresponseandnoiserejection.Audio rejectionistypically50dB.Typicaloutputvoltageresponsefor a50%to100%steploadtransientisaslowas1.3%witha150 µSrecoverytime.Inputripplecurrentistypically35mAp-pwith outputripplevoltagetypically50mVp-p. inHibit Function SMHFconvertersprovideaninhibitterminalthatcanbeused todisableinternalswitching,resultinginnooutputandverylow quiescentinputcurrent.Theconverterisinhibitedwhenalogic low(≤0.8–outputdisabled)isappliedtotheinhibitpin.The unitisenabledwhenthepin,whichisinternallyconnectedtoa pull-upresistor,isleftunconnectedorisconnectedtoanopen- collectorgate.Theopencircuitoutputvoltageassociatedwiththe inhibitpinis8.5to12VDC.Intheinhibitmode,amaximumof 4mAmustbesunkfromtheinhibitpinat28VDCinput. models vDc SIngLE 2.5 3.3 5 12 15 DUAL ±5 ±12 ±15 ClearedbyU.S.DoDOSRforPublicRelease OSRcasenumber09S-0995,datedMarch13,2009. Crane Aerospace & Electronics Power Solutions smHF single and dual dc/dc converters CraneAerospace&Electronics Electronicsgroup(InterpointBrand) POBox97005•RedmondWA98073-9705 425.882.3100•electronics@craneae.com www.craneae.com Page1of15 RevD-20070404 28 Volt input – 15 Watt |
Số phần tương tự - SMHF2805S |
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Mô tả tương tự - SMHF2805S |
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