MSA2812SSLASH883 datasheet(2/15 Pages) INTERPOINT

2 / 15 page

inhibit FunCtion

Theinhibitfeaturecanbeusedtodisableinternalswitchingand

inhibittheunit’soutput.Inhibitinginthismannerresultsinlow

standbycurrentandnogenerationofswitchingnoise.

Theconverterisinhibitedwhentheinhibitpinispulledbelow

0.8Vandenabledwhenitsinhibitpinisleftfloating.Anexternal

inhibitinterfaceshouldbecapableofpullingtheconverter’s

inhibitpinbelow0.8Vwhilesinkingthemaximuminhibitcurrent

andalsoallowingtheinhibitpintofloathightoenablethe

converter.Avoltageshouldnotbeappliedtotheinhibitpin.The

opencircuitoutputvoltageassociatedwiththeinhibitpinis9to

11V.Intheinhibitmode,amaximumof4mAmustbesunkfrom

theinhibitpin.See“Figure2:InhibitInterfaceMSAandMGA”on

page3.

unDervoltage loCkout anD transient

proteCtion

Undervoltagelockouthelpskeepsystemcurrentlevelslowduring

initializationorre-startoperations.Theycanwithstandshortterm

transientsofupto50voltswithoutdamage.Alowvoltagelockout

featurekeepstheconvertershutdownbelowapproximately13

VDCtoensuresmoothinitialization.

mil-stD-461

UseourFMSA-461(down-leaded)orourFMGA-461(surface

mount)EMIfiltertopasstheCE03requirementsof

MIL-STD-461C.

paCkaging

MSA-Down-leadedpackage

TheMSASeriesconvertersarepackagedinhermeticallysealed,

projection-weldedmetalcaseswhichprovideEMI/RFIshielding.

Thesmallsize,1.075x1.075x0.270inches(27.31x27.31x

6.86mm),savesspaceandweightincriticalapplications.See

“Figure26:MSACaseDimensions”onpage12.

MGA-Surfacemountpackage

ThesurfacemountMGAdc-dcconverterscanbemountedwith

pick-and-placeequipmentormanually.See“Figure28:MGA

Gull-WingSolderPadLayout”onpage13formoreinformation.

InternalcomponentsaresolderedwithSN96(melting

temperature221°C)topreventdamageduringreflow.Maximum

reflowtemperatureforsurfacemountingtheMGAconverteris

220°Cforamaximumof30seconds.SN60,62,or63arethe

recommendedtypesofsolder.Handsolderingshouldnotexceed

300°Cfor10secondsperpin.

Thehermeticallysealedmetalcasesareavailableintwodifferent

leadconfigurations.See“Figure27:MGACaseDimensions”on

page13and“Figure28:MGAGull-WingSolderPadLayout”

onpage13.

Negative

Output

Common

Positive

Output

Input

Common

Case

Ground

Positive

Input

Inhibit

PWM

Control

Error

Amp

Isolated

Feedback

= Dual Output

Figure 1: bloCk Diagram msa anD mga

Crane Aerospace & Electronics Power Solutions

MSA/MGA Single and Dual DC-DC Converters

28 Volt input – 5 WAtt

www.craneae.com/interpoint

Page2of15

MSA_MGARevAC-2013.06.13

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