DC/DC regulator Input 8.3 - 16 V Output 10 A

Key Features • Wideinput,8.3-16Vdc

• Programmableoutput,0.75-5.5Vdc

• Monotonicstartupintopre-biasedoutput

• Undervoltageprotection

• Shortcircuitprotection

• Remotesense

• RemoteOn/Off

• DesignforEnvironment(DfE)

• EuropeanCommissionDirective2002/95/EC(RoHs)compliant

E Datasheet

DC/DCregulatorInput8.3-16VOutput10A

PMB8518TP

ThePMBseriesofSILDC/DCregulators(POL)arein-tendedtobeusedaslocaldistributedpowersourcesindistributedpowerarchitecture.Thesinglein-linedesignmakesthePMBseriessuitableforapplicationswhereboardspaceislimited.Thehighefficiencyandhighreli-abilityofthePMBseriesmakesthemparticularlysuitedforthecommunicationsequipmentoftodayandtomor-row.

Theseproductsaremanufacturedusingthemostadvancedtechnologiesandmaterialstocomplywithenvironmentalrequirements.Designedtomeethighreliabilityrequirementsofsystemsmanufacturers,thePMBrespondstoworld-classspecifications.EricssonPowerModulesisanISO9001/14001certifiedsupplier.

ContentsProductProgram. . . . . . . . . . . . . . . . . . . . . . 2MechanicalData. . . . . . . . . . . . . . . . . . . . . . 2Connections . . . . . . . . . . . . . . . . . . . . . . . . . 2AbsoluteMaximumRatings . . . . . . . . . . . . . 3Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3ProductQualificationSpecification. . . . . . . . 4SafetySpecification . . . . . . . . . . . . . . . . . . . 5Adjustedto1.0Vout-Data. . . . . . . . . . . . . . 6Adjustedto1.2Vout-Data. . . . . . . . . . . . . . 9Adjustedto1.5Vout-Data. . . . . . . . . . . . . 12Adjustedto1.8Vout-Data. . . . . . . . . . . . . 15Adjustedto2.5Vout-Data. . . . . . . . . . . . . 18Adjustedto3.3Vout-Data. . . . . . . . . . . . . 21Adjustedto5.0Vout-Data. . . . . . . . . . . . . 24EMCSpecification. . . . . . . . . . . . . . . . . . . . 27OperatingInformation. . . . . . . . . . . . . . . . . 28ThermalConsiderations . . . . . . . . . . . . . . . 30SolderingInformation. . . . . . . . . . . . . . . . . 31DeliveryPackageInformation. . . . . . . . . . . 31CompatibilitywithRoHSrequirements. . . . 31Reliability. . . . . . . . . . . . . . . . . . . . . . . . . . . 31SalesOfficesandContactInformation. . . . 32

Product Program

Vo/Io max Vi Output 1

Po max Ordering No. Comment

8.3 - 16 V 0.75 - 5.50/10A 50 W PMB 8518T P Released 1.0 V/10 A 10 W PMB 8118N P On request 1.2 V/10 A 12 W PMB 8118L P On request 1.5 V/10 A 15 W PMB 8118H P On request 1.8 V/10 A 18 W PMB 8118G P On request 2.5 V/10 A 25 W PMB 8219 P On request 3.3 V/10 A 33 W PMB 8310 P On request

8.3 - 16 V 5 V/10 A 50 W PMB 8511 P On request Option Suffix Example Negative Remote Control Logic N PMB 8518T PN Straight Pin L PMB 8518T PL

Connections

Pin Designation Function 1 - 2 + Out Output voltage 3 + S Remote sensing 4 + Out Output voltage 5 GND Ground* 6 GND Ground* 7 - 8 + In Input voltage 9 Vadj Outpur voltage adjust 10 RC Remote control * Should be connected together through a ground plane.

PMB 8518T P Datasheet 2 EN/LZT 146 065 R3A Ericsson Power Modules, Nov 2011

Mechanical Information for PMB pin

All component placements – whether shown as physical components or symbolical outline – are for reference only and are subject to change throughout the product’s life cycle, unless explicitly described and dimensioned in this drawing.


Mechanical Information for PMB Straight pin


Soldering Information - Hole Mounting The hole mounted product is intended for plated through hole mounting by wave or manual soldering. The pin temperature is specified to maximum to 270°C for maximum 10 seconds. A maximum preheat rate of 4°C/s and maximum preheat temperature of 150°C is suggested. When soldering by hand, care should be taken to avoid direct contact between the hot soldering iron tip and the pins for more than a few seconds in order to prevent overheating. A no-clean flux is recommended to avoid entrapment of cleaning fluids in cavities inside the product or between the product and the host board. The cleaning residues may affect long time reliability and isolation voltage. Delivery Package Information The products are delivered in antistatic clamshell

Tray Specifications Material Antistatic PET Surface resistance 105 < Ohm/square < 1011 Bakability The trays are not bakable Tray thickness 16 mm [0.630 inch] Box capacity 105 products (3 full trays/box) Tray weight 110 g empty, 313g full tray


Reliability

The failure rate (λ) and mean time between failures (MTBF= 1/λ) is calculated at max output power and an operating ambient temperature (TA) of +40°C. Ericsson Power Modules uses Telcordia SR-332 Issue 2 Method 1 to calculate the mean steady-state failure rate and standard deviation (σ). Telcordia SR-332 Issue 2 also provides techniques to estimate the upper confidence levels of failure rates based on the mean and standard deviation. Mean steady-state failure rate, λ Std. deviation, σ 60 nFailures/h 23.1 nFailures/h MTBF (mean value) for the PMB series = 16.7 Mh. MTBF at 90% confidence level = 11.2 Mh Compatibility with RoHS requirements The products are compatible with the relevant clauses and requirements of the RoHS directive 2011/65/EU and have a maximum concentration value of 0.1% by weight in homogeneous materials for lead, mercury, hexavalent chromium, PBB and PBDE and of 0.01% by weight in homogeneous materials for cadmium. Exemptions in the RoHS directive utilized in Ericsson Power Modules products are found in the Statement of Compliance document. Ericsson Power Modules fulfills and will continuously fulfill all its obligations under regulation (EC) No 1907/2006 concerning the registration, evaluation, authorization and restriction of chemicals (REACH) as they enter into force and is through product materials declarations preparing for the obligations to communicate information on substances in the products.


Product Qualification Specification Characteristics External visual inspection IPC-A-610

Change of temperature (Temperature cycling) IEC 60068-2-14 Na

Temperature range Number of cycles Dwell/transfer time

-40 to 100°C 1000 15 min/0-1 min

Cold (in operation) IEC 60068-2-1 Ad Temperature TA Duration

-45°C 72 h

Damp heat IEC 60068-2-67 Cy Temperature Humidity Duration

85°C 85 % RH 1000 hours

Dry heat IEC 60068-2-2 Bd Temperature Duration

125°C 1000 h

Electrostatic discharge susceptibility

IEC 61340-3-1, JESD 22-A114 IEC 61340-3-2, JESD 22-A115

Human body model (HBM) Machine Model (MM)

Class 2, 2000 V Class 3, 200 V

Immersion in cleaning solvents IEC 60068-2-45 XA, method 2 Water Glycol ether

55°C 35°C

Mechanical shock IEC 60068-2-27 Ea Peak acceleration Duration

100 g 6 ms

Moisture reflow sensitivity 1 J-STD-020C Level 1 (SnPb-eutectic) Level 3 (Pb Free)

225°C 260°C

Operational life test MIL-STD-202G, method 108A Duration 1000 h

Resistance to soldering heat 2 IEC 60068-2-20 Tb, method 1A Solder temperature Duration

270°C 10-13 s

Robustness of terminations IEC 60068-2-21 Test Ua1 IEC 60068-2-21 Test Ue1

Through hole mount products Surface mount products

All leads All leads

Solderability

IEC 60068-2-58 test Td 1 IEC 60068-2-20 test Ta 2

Preconditioning Temperature, SnPb Eutectic Temperature, Pb-free Preconditioning Temperature, SnPb Eutectic Temperature, Pb-free

150°C dry bake 16 h 215°C 235°C Steam ageing 235°C 245°C

Vibration, broad band random IEC 60068-2-64 Fh, method 1 Frequency Spectral density Duration

10 to 500 Hz 0.07 g2/Hz 10 min in each direction

Notes 1 Only for products intended for reflow soldering (surface mount products) 2 Only for products intended for wave soldering (plated through hole products)


EN/LZT146065R2A©EricssonPowerModules,April2007PMB8518TPDatasheet

Absolute Maximum Ratings

Characteristics min typ max Unit

Tref MaximumOperatingTemperature,seethermalconsiderations -45 +115 ˚C

TS Storagetemperature -55 +125 ˚C

VI

Inputvoltage -0.3 16 Vdc

Vtr Inputvoltagetransient -0.3 40 Vdc

VRC Remotecontrolvoltage

Negativelogic -0.3 16 Vdc

Positivelogic -0.3 16 Vdc

Characteristics Conditions min typ max Unit

VI Inputvoltagerange 8.3 12 16 V

Vloff Turn-offinputvoltage Iomax 7.8 V

VIon Turn-oninputvoltage Iomax 8.0 V

CI

Inputcapacitance 30 µF

PIiInputidlingpowerIo=0A,VI=12V

Vo=1.00V 340 405 mW

Vo=1.20V 370 445 mW

Vo=1.50V 420 505 mW

Vo=1.80V 480 575 mW

Vo=2.50V 630 755 mW

Vo=3.30V 800 960 mW

Vo=5.00V 1090 1410 mW

PRC

Inputstand-bypower VI=12V,RCactivated 40 mW

VIac

Inputripple1)20Hz...5MHzVI=12V,Io=1.0xIomax

Vo=1.00V 100 mVp-p

Vo=1.20V 120 mVp-p

Vo=1.50V 160 mVp-p

Vo=1.80V 170 mVp-p

Vo=2.50V 200 mVp-p

Vo=3.30V 220 mVp-p

Vo=5.00V 275 mVp-p

Input

StressinexcessofAbsoluteMaximumRatingsmaycausepermanentdamage.AbsoluteMaximumRatings,sometimesreferredtoasnodestructionlimits,are

normallytestedwithoneparameteratatimeexceedingthelimitsofOutputdataorElectricalCharacteristics.Ifexposedtostressabovetheselimits,function

andperformancemaydegradeinanunspecifiedmanner.

Tref = -30 ... +90 ˚C, VI=8.3...16VunlessotherwisespecifiedTypvaluesspecifiedat:Tref = +25 ˚C, VInom,Iomax=10A

Fundamental Circuit Diagram

GNDGND

PWM

+IN +OUT

+SENSE

Vadj

controller

Ref

GND

Erroramplifier

RC RC

GND

Block

1)Measuredwith4x4,7µFceramiccapacitors.

PMB 8518T P seriesDC/DC regulators, Input 8.3-16 V, Output 10 A/50 W

EN/LZT 146 065 R3A Oct 2011

© Ericsson Power Modules AB



EricssonPowerModulesDC/DCconvertersandDC/DCregulatorsaredesignedinaccordancewithsafetystandardsIEC/EN/UL60950, Safety of Information Technology Equipment.

IEC/EN/UL60950containsrequirementstopreventinjuryordamageduetothefollowinghazards:•Electrical shock •Energy hazards •Fire •Mechanical and heat hazards •Radiation hazards •Chemical hazards

On-boardDC-DCconvertersaredefinedascomponentpowersupplies.AscomponentstheycannotfullycomplywiththeprovisionsofanySafetyrequirementswithout“ConditionsofAcceptability”.ItistheresponsibilityoftheinstallertoensurethatthefinalproducthousingthesecomponentscomplieswiththerequirementsofallapplicableSafetystandardsandDirectivesforthefinalproduct.

ComponentpowersuppliesforgeneraluseshouldcomplywiththerequirementsinIEC60950,EN60950andUL60950“Safetyofinformationtechnologyequipment”.

Thereareothermoreproductrelatedstandards,e.g.IEC61204-7“Safetystandardforpowersupplies",IEEE802.3af“EthernetLAN/MANDataterminalequipmentpower”,andETS300132-2“Powersupplyinterfaceattheinputtotelecommunicationsequipment;part2:DC”,butallofthesestandardsarebasedonIEC/EN/UL60950withregardstosafety.

EricssonPowerModulesDC/DCconvertersandDC/DCregulatorsareUL60950recognizedandcertifiedinaccordancewithEN60950.

TheflammabilityratingforallconstructionpartsoftheproductsmeetsUL94V-0.

Theproductsshouldbeinstalledintheend-useequipment,inaccordancewiththerequirementsoftheultimateapplication.NormallytheoutputoftheDC/DCconverterisconsideredasSELV(SafetyExtraLowVoltage)andtheinputsourcemustbeisolatedbyminimumDoubleorReinforcedInsulationfromtheprimarycircuit(ACmains)inaccordancewithIEC/EN/UL60950.

Safety Specification

IsolatedDC/DCconverters.

TheinputvoltagetotheDC/DCregulatorisSELV(SafetyExtraLowVoltage)andtheoutputremainsSELVundernormalandabnormaloperatingconditions.

ItisrecommendedthataslowblowfusewitharatingtwicethemaximuminputcurrentperselectedproductbeusedattheinputofeachDC/DCregulator.

Non-isolatedDC/DCregulators.

24Vdcsystems.TheinputvoltagetotheDC/DCconverterisSELV(SafetyExtraLowVoltage)andtheoutputremainsSELVundernormalandabnormaloperatingconditions.

48and60Vdcsystems.IftheinputvoltagetoEricssonPowerModulesDC/DCconverteris75Vdcorless,thentheoutputremainsSELV(SafetyExtraLowVoltage)undernormalandabnormaloperatingconditions.SinglefaulttestingintheinputpowersupplycircuitshouldbeperformedwiththeDC/DCconverterconnectedtodemonstratethattheinputvoltagedoesnotexceed75Vdc.

IftheinputpowersourcecircuitisaDCpowersystem,thesourcemaybetreatedasaTNV2circuitandtestinghasdemonstratedcompliancewithSELVlimitsandisolationrequirementsequivalenttoBasicInsulationinaccordancewithIEC/EN/UL60950.

ItisrecommendedthatafastblowfusewitharatingtwicethemaximuminputcurrentperselectedproductbeusedattheinputofeachDC/DCconverter.Ifaninputfilterisusedinthecircuitthefuseshouldbeplacedinfrontoftheinputfilter.IntherareeventofacomponentproblemintheinputfilterorintheDC/DCconverterthatimposesashortcircuitontheinputsource,thisfusewillprovidethefollowingfunctions:

•IsolatethefaultyDC/DCconverterfromtheinputpowersourcesoasnottoaffecttheoperationofotherpartsofthesystem.

•Protectthedistributionwiringfromexcessivecurrentandpowerlossthuspreventinghazardousoverheating.

Thegalvanicisolationisverifiedinanelectricstrengthtest.Thetestvoltage(VISO)betweeninputandoutputis1500Vdcor2250Vdcfor60seconds(refertoproductspecification).Leakagecurrentislessthan1µAatnominalinputvoltage.

Generalinformation.


EN/LZT 146 065 R3A Oct 2011




Characteristics ConditionsOutput

Unitmin typ max

dVOi Outputvoltageadjustedsetting Tref=+25°C,VInom,IOmax -2 +2 %VO

dVO Outputvoltagetoleranceband IO=0.01...1.0xIOmax -3 +3 %VO

dVO Idlingvoltage IO=0A -2 +2 %VO

dVO Lineregulation VImin...VImax,IOmax 2 mV

dVO Loadregulation 0.01...1.0xIOmax,VInom 25 mV

ttrLoadtransientrecoverytime

Loadstep=0.25-0.75-0.25xIOmax,dI/dt=5A/µs,CO=2x150µF,VI=12V

40 µs

Vtr Loadtransientvoltage ±100 mV

Tcoeff Temperaturecoefficient Tref=-30...+90°C,IOmax -0.6 mV/°C

ts Start-upVIonto0.9xVO IO=IOmax,VInom 7 ms

tr Ramp-up,VI...0.9xVO IO=IOmax,VInom 3 ms

tf Falltime,VIto0.1xVO IO=IOmax,VInom 1 ms

tf Falltime,VIto0.1xVO IO=0A,VInom 22 s

tRC RCshut-downtime0.1xVO IO=IOmax,VInom 1 ms

tRC RCstart-uptime0.9xVO IO=IOmax,VInom 7 ms

tRC RCfalltime,0.1xVO IO=0A,VInom 24 s

IO Outputcurrent 0 10 A

POmax Maxoutputpower 10 W

Ilim Currentlimitingthreshold Tref<Trefmax 12 A

VOac Outputripple 20Hz...5MHz,IOmax 35 mVp-p

η Efficiency-50%load IO=0.5xIOmax,VO=1.00V 83.8 %

η Efficiency-100%load IO=IOmax,VO=1.00V 78.4 82.5 %

Pd PowerDissipation IO=IOmax,VO=1.00V 2.1 2.7 W

Fo Switchingfrequency IO=(0...1)xIOmax 260 300 340 kHz

Isense Remotesensecurrent 10 mA

II StaticinputcurrentVI=8.3V IO=IOmax,VO=1.00V 1.5 A

MTBF Predictedreliability 5millionhours

Tref=-30...+90°C,VI=8.3...16Vunlessotherwisespecified.Inputfilter4x4.7µF,Outputfilter2x150µFTypvaluesspecifiedat:Tref=+25°CandVInom.IOmax=10A.Note:+Senseconnectedto+Out.Radj41.42kΩ

Adjusted to 1.0 Vout - Data


EN/LZT 146 065 R3A Oct 2011




Start-Up

Start-upatIO=10AresistiveloadatTref=+25°C,Vin=12V.StartenabledbyconnectingVin.Toptrace:outputvoltage(1V/div.).Bottomtrace:inputvoltage(10V/div.).Timescale:2ms/div.

Efficiency Power Dissipation

Adjusted to 1.0 Vout - Typical Characteristics

Efficiencyvs.loadcurrentandinputvoltageatTref=+25°C

Dissipatedpowervs.loadcurrentandinputvoltageatTref=+25°C

Generalconditions:Inputfilter4x4.7µF,Outputfilter2x150µF

Output Current Derating at 1 V input

Availableloadcurrentvs.ambientairtemperatureandairflowatVin=12V.Seeconditionsonpage30.

Outputvoltagevs.loadcurrent.

Output Characteristics

Turn Off

Turn-offatIO=10AresistiveloadatTref=+25°C,Vin=12V.Turn-offenabledbydisconnectingVin.Toptrace:outputvoltage(1V/div.).Bottomtrace:inputvoltage(10V/div.).Timescale:0,1ms/div.


EN/LZT 146 065 R3A Oct 2011




Output Ripple Transient

Outputvoltageresponsetoloadcurrentstep-change(2.5-7.5-2.5A)atTref=+25°C,Vin=12V.dI/dt=5A/µsToptrace:outputvoltage(ac)(100mV/div.).Bottomtrace:loadcurrent(dc)(10A/div.)Timescale:0.1ms/div.

Outputvoltageripple(20mV/div.)atTref=+25°C,Vin=12V,IO=10Aresistiveload.Bandwidth=5MHz.Timescale:2µs/div.

Adjusted to 1.0 Vout - Typical CharacteristicsGeneralconditions:Inputfilter4x4.7µF,Outputfilter2x150µF


EN/LZT 146 065 R3A Oct 2011




Tref=-30...+90°C,VI=8.3...16Vunlessotherwisespecified.Inputfilter4x4,7µF,Outputfilter2x150µFTypvaluesspecifiedat:Tref=+25°CandVInom,IOmax=10A.Note:+Senseconnectedto+Out.Radj22.46kΩ

Adjusted to 1. Vout - Data


Unitmin typ max


dVO Outputvoltagetoleranceband 0.01...1.0xIOmax,VInom -3 +3 %VO






40 µs






















EN/LZT 146 065 R3A Oct 2011



10 EN/LZT146065R2A©EricssonPowerModules,April2007PMB8518TPDatasheet

Output Characteristic

Start-Up




Adjusted to 1. Vout - Typical Characteristics


[A]

[V]





Turn Off

Turn-offatIO=10AresistiveloadatTref=+25°C,Vin=12V.Turn-offenabledbydisconnectingVin.Toptrace:outputvoltage(1V/div.).Bottomtrace:inputvoltage(10V/div.).Timescale:2ms/div.


EN/LZT 146 065 R3A Oct 2011







Adjusted to 1. Vout - Typical CharacteristicsGeneralconditions:Inputfilter4x4.7µF,Outputfilter2x150µF


EN/LZT 146 065 R3A Oct 2011







Unitmin typ max


dVO Outputvoltagetoleranceband 0.01...1.0xIOmax,VInom -3 +3 %VO



dVO Loadregulation IO=0.01...IOmax,VInom 25 mV



40 µs






















EN/LZT 146 065 R3A Oct 2011





Start-Up










Turn Off



EN/LZT 146 065 R3A Oct 2011







Adjusted to 1. Vout - Typical CharacteristicsGeneralconditions:Inputfilter4x4.7µF,Outputfilter2x150µF


EN/LZT 146 065 R3A Oct 2011




Tref=–30…+90°C,VI=8.3...16Vunlessotherwisespecified.Inputfilter4x4.7µF,Outputfilter2x150µFTypvaluesspecifiedat:Tref=+25°CandVInom.IOmax=10A.Note:+Senseconnectedto+Out.Radj9.024kΩ



Unitmin typ max








40 µs






















EN/LZT 146 065 R3A Oct 2011




Efficiency




Start-Up



[A]

[% ]



Power Dissipation



Turn Off



EN/LZT 146 065 R3A Oct 2011




Output Ripple


Transient





EN/LZT 146 065 R3A Oct 2011





Adjusted to . Vout - Data


Unitmin typ max








40 µs






















EN/LZT 146 065 R3A Oct 2011





Start-Up


[A]

[V]



Adjusted to . Vout - Typical Characteristics


[A]

[W]





Turn Off



EN/LZT 146 065 R3A Oct 2011







Adjusted to . Vout - Typical CharacteristicsGeneralconditions:Inputfilter4x4.7µF,Outputfilter2x150µF


EN/LZT 146 065 R3A Oct 2011





Adjusted to . Vout - Data


Unitmin typ max








40 µs






















EN/LZT 146 065 R3A Oct 2011




Output Current Derating at 1 V input Output Characteristic

Start-Up

Outputvoltagevs.loadcurrent.Availableloadcurrentvs.ambientairtemperatureandairflowatVin=12V.Seeconditionsonpage30.



Adjusted to . Vout - Typical Characteristics

Efficiencyvs.loadcurrentandinputvoltageatTref=+25°C Dissipatedpowervs.loadcurrentandinputvoltageatTref=+25°C


Turn Off



EN/LZT 146 065 R3A Oct 2011







Adjusted to . Vout - Typical CharacteristicsGeneralconditions:Inputfilter4x4.7µF,Outputfilter2x150µF


EN/LZT 146 065 R3A Oct 2011





Adjusted to .0 Vout - Data


Unitmin typ max








40 µs















η Efficiency-100%load IO=IOmaxA,VO=5.00V 90.9 94.4 %





MTBF Predictedreliability 5Millionhours


EN/LZT 146 065 R3A Oct 2011




Output Current Derating at 1 V input Output Characteristic

Start-Up

Outputvoltagevs.loadcurrent.Availableloadcurrentvs.ambientairtemperatureandairflowatVin=12V.Seeconditionsonpage30.



Adjusted to .0 Vout - Typical Characteristics

Efficiencyvs.loadcurrentandinputvoltageatTref=+25°C Dissipatedpowervs.loadcurrentandinputvoltageatTref=+25°C


Turn Off



EN/LZT 146 065 R3A Oct 2011







Adjusted to .0 Vout - Typical CharacteristicsGeneralconditions:Inputfilter4x4.7µF,Outputfilter2x150µF


EN/LZT 146 065 R3A Oct 2011




EMC SpecificationTheconductedEMImeasurementwasperformedusingaregulatorplaceddirectlyonthetestbench.ThefundamentalswitchingfrequencyforPMB8000is300kHz.Themeasure-mentbelowhasbeenperformedwithVin=12V,Vout=5Vandmaxload.Inputfilter4x4.7µFandoutputfilter2x150µFwasusedduringthemeasurement.

Layout Recommendation

-10

0

20

40

60

80

100 Level [dBµA]

150k 300k 500k 1M 2M 3M 5M 7M 10M 30M Frequency [Hz]

MES EPM_PMB10A_1_pre PK PMB 8518.

Conducted EMIInputterminalvalue(typ)

Output ripple and noise test setup

Output ripple and noiseThecircuitbelowhasbeenusedfortherippleandnoisemeasurementsonthePMB8000SeriesDC/DCregulators.

TheradiatedEMIperformanceoftheDC/DCregulatorwillbeoptimisedbyincludingagroundplaneinthePCBareaundertheDC/DCregulator.Thisapproachwillreturnswitch-ingnoisetogroundasdirectlyaspossible,withimprove-mentstobothemissionsandsusceptibility.

According to MIL-std.


EN/LZT 146 065 R3A Oct 2011




Vout(V) Radj(kohm) Vtrim(V)

0.75 Open Open

1.0 41.42 0.684

1.2 22.46 0.670

1.5 13.05 0.650

1.8 9.024 0.630

2.5 5.009 0.583

3.3 3.122 0.530

5.00 1.472 0.417

5.50 1.212 0.383

Circuitconfigurationforoutputvoltageadjust

Increase

+Out

GND

VadjLoad

Radj

Sense

Operating Information

Remote Control (RC)Standard Version with "positive logic".

RCRegulatorcondition

min typ max Unit

LowlevelreferencedtoGND

OFF -0.3 0.3 V

Open ON 1.7 16 V

TheRCpinmaybeusedtoturnonorturnofftheregulatorusingasuitableopencollectorfunction.TurnoffisachievedbyconnectingtheRCpintoground.TheregulatorwillruninnormaloperationwhentheRCpinisleftopen.

RC

+IN

Module

+IN

GND

Input VoltageTheinputvoltagerange8.3…16VdcmakesthePMB8000easytouseinintermediatebusapplicationswhenpow-eredbyanon-regulatedbusconverteroraregulatedbusconverter.Foroutputvoltagetrimsover5.25Vouttheinputvoltagemustbereducedtoamaximumof14Vinordertomaintainspecifieddata.

RCRegulatorcondition

min typ max Unit

HighlevelreferencedtoGND

OFF 1.7 16 V

Open ON

TheRCpinmaybeusedtoturnonorturnofftheregulatorusingasuitableopencollectorfunction.TurnoffisachievedbyconnectingtheRCpintotheinputvoltage.TheregulatorwillruninnormaloperationwhentheRCpinisleftopen.

RC

Vi

Module

Vi

GND

Option "negative logic"

Output Voltage Adjust (Vadj)

AllPMB8000SeriesDC/DCregulatorshaveanOutputVoltageadjustpin(Vadj).Thispincanbeusedtoadjusttheoutputvoltageaboveoutputvoltageinitialsetting(0.75V).Whenincreasingtheoutputvoltagethemaximumpowerratingoftheconverterremainsthesame,andtheoutputcurrentcapabilitywillthereforedecreasecorrespondingly.Toincreasetheoutputvoltagearesistororavoltagesignalshouldbeconnected/appliedbetweenVadjpinandGND,pin5.Theresistor/voltagesignalvalueforsomestandardoutputtrimsaregivenbelow,forothervoltagesetpointsusetheformulastocalculatethecorrectresistororvoltagesignal.Foroutputvoltagesof5.25Vandhighertheinputvoltageisrestrictedtomaximum14Vin.

Formula1:Radj=(10500/(Vout–0.7525))–1000(ohm)Formula2:Vtrim=(0.7–0.0667x(Vout–0.7525))(V)

Turn off input voltageThePMB8000SeriesDC/DCregulatorsmonitortheinputvoltageandwillturnonandturnoffatpredeterminedlevels.Theminimumhysteresisbetweenturnonandturnoffinputvoltageis0.2Vwheretheturnoninputvoltageisthehigh-est.


EN/LZT 146 065 R3A Oct 2011




AllPMB8000SeriesDC/DCregulatorshaveapositivere-motesensepinthatcanbeusedtocompensateformoder-ateamountsofresistanceinthedistributionsystemandal-lowforvoltageregulationattheloadorotherselectedpoint.Theremotesenselinewillcarryverylittlecurrentanddoesnotneedalargecrosssectionalarea.However,thesenselineonthePCBshouldbelocatedclosetoagroundtraceorgroundplane.Theremotesensecircuitrywillcompensateforupto10%voltagedropbetweenthesensevoltageandthevoltageattheoutputpinsfromVOnom.Iftheremotesenseisnotneededthesensepinshouldbeleftopenorconnectedtothepositiveoutput.

Remote Sense

Current Limit ProtectionThePMB8000SeriesDC/DCregulatorsincludecurrentlimitingcircuitrythatallowsthemtowithstandcontinuousoverloadsorshortcircuitconditionsontheoutput.Theout-putvoltagewilldecreasetowardszeroforoutputcurrentsinexcessofmaxoutputcurrent(Iomax).Whenthecurrentlimitisreachedtheregulatorwillgointohiccupmode.Thecur-rentlimitistemperaturedependent,i.e.thelimitdecreaseathigheroperatingtemperature,theregulatorisguaranteedtostartatIOmaxx1.25@Tref115°C.Theregulatorwillresumenormaloperationafterremovaloftheoverload.Theloaddistributionsystemshouldbedesignedtocarrythemaximumoutputshortcircuitcurrentspecified.

Over Temperature Protection (OTP) ThePMB8000SeriesDC/DCregulatorsareprotectedfromthermaloverloadbyaninternalovertemperatureshutdowncircuit.WhenthePCBtemperatureneartheICcircuitreach-es130°Ctheconverterwillshutdownimmediately.Theregulatorwillmakecontinuousattemptstostartup(non-latchingmode)andresumenormaloperationautomaticallywhenthetemperaturehasdroppedbelowthetemperaturethreshold.

Input And Output ImpedanceTheimpedanceofboththepowersourceandtheloadwillinteractwiththeimpedanceoftheDC/DCregulator.Itismostimportanttohavealowcharacteristicimpedance,bothattheinputandoutput,astheregulatorshavealowenergystoragecapability.Usecapacitorsacrosstheinputifthesourceinductanceisgreaterthan4.7µH.Suitableinputcapacitorsare22µF-220µFlowESRceramics.

Minimum Required External CapacitorsRequiredInputFilterExternalinputcapacitorsarerequiredtoincreasethelife-timeoftheinternalcapacitors.LowESRceramicsshouldbeused,theminimuminputcapacitanceisstatedbelow.

PMB8518TP 1x4.7µF

OptionalInputFilterTominimizeinputrippleandtoensureevenbetterstabilitymorecapacitorscanbeadded,seetablebelow.Considerthemaxoutputpowerinagivenapplicationandchoosesufficientcapacitorstoobtaindesiredripplelevel.Makesurethattheextracapacitorsareplacedneartheinputpins.Thetablebelowisjustanexamplesincetheboardlayoutalsohaseffectontheresult.

RequiredoutputfilterExternaloutputcapacitanceisalsorequiredtoreducetheoutputrippleandtoobtainspecifiedloadstepresponse.ItisrecommendedtouselowESRpolymercapacitorsorlowESRceramiccapacitors.

Minimumrequirement:PMB8518TP 2x150µF(low ESR polymer type).This is the output filter used in the verification and a require-ment to meet the specification.

OutputpowerDesiredinputripple(mVp-p)

150 250 500

0-20W 2x4.7µF ----- -----

20-40W 5x4.7µF 2x4.7µF -----

40-50W 8 x 4.7µF 4x 4.7µF 2 x 4.7µF

Note:Alloutputcharacteristicsinthedatasheetaremeasuredwith4*4.7µFattheinputpins.

Maximum Capacitive LoadWhenpoweringloadswithsignificantdynamiccurrentrequirements,thevoltageregulationattheloadcanbeimprovedbyadditionofdecouplingcapacitanceattheload.ThemosteffectivetechniqueistolocatelowESRceramiccapacitorsasclosetotheloadaspossible,usingseveralcapacitorstolowerthetotalESR.Theseceramiccapacitorswillhandleshortdurationhigh-frequencycomponentsofdynamicloadchanges.Inaddition,highervaluesofcapacitors(electrolyticcapacitors)shouldbeusedtohandlethemid-frequencycomponents.ItisequallyimportanttousegooddesignpracticewhenconfiguringtheDCdistributionsystem.

LowresistanceandlowinductancePCBlayoutsandcablingshouldbeused.Rememberthatwhenusingremotesensing,allresistance(includingtheESR),inductanceandcapacitanceofthedistributionsystemiswithinthefeedbackloopoftheregulator.Thiscanaffectontheregulatorscompensationandtheresultingstabilityanddynamicresponseperformance.

VerylowESRandhighcapacitancemustbeusedwithcare.A“ruleofthumb”isthatthetotalcapacitancemustneverexceedtypically500-700µFifonlylowESR(<2mΩ)ceramiccapacitorsareused.Ifmorecapacitanceisneeded,acombinationoflowESRtypeandelectrolyticcapacitorsshouldbeused,otherwisethestabilitywillbeaffected.

Operating Information


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Thermal Considerations

GeneralThePMB8000SeriesDC/DCregulatorsaredesignedtooperateinavarietyofthermalenvironments,howeversufficientcoolingshouldbeprovidedtohelpensurereliableoperation.Heatisremovedbyconduction,convectionandradiationtothesurroundingenvironment.Increasedairflowenhancestheheattransferviaconvection.Propercoolingcanbeverifiedbymeasuringthetemperatureatthereferencepoint(Tref).

1

Tref

ThePMB8000thermaltestingisperformedwiththeproductmountedonanFR4board254x 254 mm with 8x254 mm with 8254mmwith8layersof35µmcopper.AirflowisperpendiculartotheTrefside.

25m

m[1

in.]

airflow

Test board

choke

Calculation of ambient temperatureByusingthethermalresistancethemaximumallowedambienttemperaturecanbecalculated.

1. Thepowerlossiscalculatedbyusingtheformula ((1/η)-1)×outputpower=powerlosses. η=efficiencyofconverter.E.g88%=0.88

2. Findthevalueofthethermalresistanceforeachproduct inthediagrambyusingtheairflowspeedattheoutput sectionoftheconverter.Takethethermalresistancex powerlosstogetthetemperatureincrease.

3. Maxallowedcalculatedambienttemperatureis:Max TrefofDC/DCregulator–temperatureincrease.

B.3.19W×12.2°C/W=38.9°C

C.115°C-38.9°C=maxambienttemperatureis76.1°C

Therealtemperaturewillbedependentonseveralfactors,likePCBsizeandtype,directionofairflow,airturbulenceetc.Itisrecommendedtoverifythetemperaturebytesting.

A.(()-1)×50W=3.19W

10.94

E.g V output at 1 m/s, full load, 1 V in:

Thermalresistancevs.airspeedmeasuredattheregulator.

ThePMB8000seriesregulatorcanacceptupto5mFofcapacitiveloadontheoutputatfullload.Thisgives<500µF/AofIO.Whenusingthatlargecapacitanceitisimportanttoconsidertheselectionofoutputcapacitors;theresultingbehaviorisacombinationoftheamountofcapacitanceandESR.

AcombinationoflowESRandoutputcapacitanceexceeding5mFforPMB8518cancausetheregulatorintoovercurrentprotectionmode(hick-up)duetohighstartupcurrent.TheoutputfiltermustthereforebedesignedwithoutexceedingtheabovestatedcapacitancelevelsiftheESRislowerthen30-40mΩ.Parallel OperationThePMB8000SeriesDC/DCregulatorscanbeconnectedinparallelwithacommoninput.Parallelingisaccomplishedbyconnectingtheoutputvoltagepinsdirectlyandusingaloadsharingdeviceontheinput.Layoutconsiderationsshouldbemadetoavoidloadimbalance.Formoredetailsonparalleling,pleaseconsultyourlocalapplicationssup-port.

(max115°C)


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Sales Offices and Contact Information

CompanyHeadquarters EricssonPowerModulesABLMEricssonsväg30SE-12625StockholmSweden

Phone:+46-8-568-69620Fax:+46-8-568-69599

China EricssonSimtekElectronicsCo.33FuhuaRoadJiadingDistrictShanghai201818China

Phone:+86-21-5990-3258Fax:+86-21-5990-0188

NorthandSouthAmerica EricssonInc.PowerModules6300LegacyDr.Plano,TX75024USA

Phone:+1-972-583-5254+1-972-583-6910Fax:+1-972-583-7839

HongKong(AsiaPacific) EricssonLtd.12/F.DevonHouse979King’sRoadQuarryBayHongKong

Phone:+852-2590-2453Fax:+852-2590-7152

Italy,Spain(Mediterranean) EricssonPowerModulesABViaCadorna7120090Vimodrone(MI)Italy

Phone:+39-02-265-946-07Fax:+39-02-265-946-69

Allothercountries ContactCompanyHeadquartersorvisitourwebsite:www.ericsson.com/powermodules

Informationgiveninthisdatasheetisbelievedtobeaccurateandreliable.Noresponsibilityisassumedfortheconsequencesofitsusenorforanyinfringementofpatentsorotherrightsofthirdpartieswhichmayresultfromitsuse.NolicenseisgrantedbyimplicationorotherwiseunderanypatentorpatentrightsofEricssonPowerModules.TheseproductsaresoldonlyaccordingtoEricssonPowerModules’generalconditionsofsale,unlessotherwiseconfirmedinwriting.Specificationssubjecttochangewithoutnotice.

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Phone:+49-89-9500-6905Fax:+49-89-9500-6911

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Phone:+81-3-5733-5107Fax:+81-3-5753-5162


EN/LZT 146 065 R3A Oct 2011



DC/DC regulator Input 8.3 - 16 V Output 10 A

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