矽力杰 Silergy SQ34815 PD 反激转换器 规格书 Datasheet 佰祥电子

SQ34815

IEEE802.3af/at-CompatiblePoE

PowerDeviceInterfacewith

13WHigh-frequencyFlybackConverter

GeneralDescriptionFeatures

SupportstheIEEE802.3af/atStandard

TheSQ34815isacombinedPoweroverEthernet(PoE)

powereddevice(PD)solutionwithPDinterfaceand100V,0.45ΩHot-swapSwitch

optimizedFlybackconverterintegrated.AdaptorORingSupport

Powerupto13W(Input)PDs

TheSQ34815supportstheIEEE802.3af/atStandardasAuto-maintainPowerSignature

a13Wpowereddevice.ItincludesdetectionandPrimarySideRegulateFlybackwithQR-mode

classificationmodes,a100Vhot-swapswitch,aswellasOperationandPWM/PFMControl

themaintainpowersignaturefunction.SecondarySideRegulateFlybackwithSelectable

TheFlybackconverterisspecificallydesignedfortheFrequencyandInternalSlopeCompensation

lowcostandsmallsizeisolatedsolutionwithprimary-Integrate180V,0.65ΩMOSFETforConverter

sideregulate(PSR)Flyback,andsecondary-sideRoHSCompliantandHalogenFree

regulate(SSR)Flyback.ToachievethehigherCompactPackage:QFN45-28

efficiencyandbetterEMIperformance,theSQ34815

drivesFlybackconvertersinQuasi-Resonantmodeand

adaptivePWM/PFMcontrolatPSRmode,theApplications

maximumswitchingfrequencyisupto500kHz.When

theFlybackissettoSSRmode,theswitchingfrequencyIEEE802.3af/atComplaintDevices

canbeprogrammablethroughanexternalresistor.TheVideoandVoIPTelephones

internal180V,0.65ΩMOSFETachievesgoodthermalRFIDReaders

performanceincompactpackage,QFN45-28.Multi-bandAccessPoints

TheSQ34815providescomprehensiveandreliableSecurityCameras

protectionsincludingOLP,VCCOVP,cyclebycycle

peakcurrentlimit,internalOTP,etc.

OrderingInformation

SQ34815□(□□□)

PackageCode

OptionalSpecCode

OrderingNumberPackagetypeNote

SQ34815TQQQFN45-28----

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SQ34815

TypicalApplications

RUVHD2

CinD1

R

UVLCUV

RT2PCout

VDDUVLOT2P

+48V

-DRAIN

fromRDEN

transformerPoE

FromEthernetDENRVC1DVC1

C1Z1VCC

RCLS

CLS

CVC

RFB1

AMPSFB

RMPS

RFB2

VSS

COMP

MODE

APD

RAPD1

RTNGND

RAPD2

Adaptor

D4

Figure1.SchematicDiagram

Pinout(topview)

N/CN/CMODEN/CVSSN/C

25

26

27

282423

VDD122N/C

AMPS221RTN

DEN320N/C

CLS419T2P

ExposedPad

ConnecttoGND

APD518N/C

FB617GND

COMP716GND

UVLO815N/C

9

12

11

10

1314

GNDVCCN/CDRAIN

N/CDRAIN

QFN45-28

TopMark:ELQxyz(devicecode:ELQ,x=yearcode,y=weekcode,z=lotnumbercode)

PinNamePinnumberPinDescription

VDD1PositivepowersupplypinforPoEandconverterinputpowerrail.

Automaticmaintainpowersignaturecontrolpin.Connectaresistorwith

appropriatepowerrating(tosupportthemaintainpowersignaturecurrent)from

AMPS2AMPStoVSStoprogramtheMAINTAINPOWERSIGNATUREcurrent

amplitude.LeaveAMPSopentodisabletheautomaticmaintainpower

signaturefunction.

Detectionpin.Connecta24.9kΩresistorbetweenVDDandDENforPoE

DEN3

detection.

Classificationpin.ConnectaresistorfromCLStoVSStoprogramthe

CLS4

classificationcurrent.

Auxiliarypowerinputdetectionpin.DriveVDD-ADPhigherthan1.5Vto

APD5

disablehot-swapMOSFETandCLSpinfunction,andforceT2Pactive.

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SQ34815

Outputvoltagefeedbackpin.Connectoneresistordividerfromsensingwinding

toregulateoutputvoltageinPSRmode.InSSRmode,itcanbeusedforoutput

FB6

voltageOVPsensing.Donotfloatthispininapplicationotherwiseprotection

willbetriggered.

Loopcompensationpin.LetitfloatinPSRapplication.Itisinternallypulledup

COMP7

to2.5VthroughRCOMPinSSRmode.

Inputunder-voltagedetectionpin.TheconverterisenabledonceUVLO

UVLO8exceedstheVUVLO+VUVLO_hysthreshold,aMLCCisrecommendedinparallel

withthelowerresistorfornoisesuppression.

GND9,16,17NegativerailinputpinoftheDC/DCconverter.

DC/DCinternalcircuitsupplypin.Connectacapacitorbetweenthispinand

VCC10

GNDtobypassVCCsupply.

DRAIN13.14DrainpinofinternalpowerMOSFET.

Type-2PSEindicationpin.T2Pisanopen-drainoutput.T2Ppulledlowto

T2P19

RTNindicatesthepresenceofaType-2PSEorthepresenceofawalladapter.

RTN21Drainpinofinternalhot-swapMOSFET.

VSS24NegativepowersupplypinfromPoEinputpowerrail.

Frequencyselectionpin.WhentheVCCreachesVVCC_ON,theICwillsourcea

~40uAIMODEtodetectMODEvoltage.Ifthedetectedvoltageisbelow0.1V,

theICwillchoosePSRmode.Ifthedetectedvoltageisbeyond0.2V,theIC

MODE26

willenterSSRmode，atthesametime,theMODEresistoralsosettheSSR

switchingfrequencyaccordingtoFsw=3750/Rmode(kΩ).

TherecommendedrangeofRMODEforSSRfrequencysettingis7.5kΩ~37.5kΩ.

11,12,15,18,20,

N/CNotconnectthispininternally.

22,23,25,27,28

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SQ34815

BlockDiagram

DRAINVCC

PSR/SSRselection

MODEVCCVCCOVP

FswSelection(SSR)

Control

2.5V

FSW_max(PSR)

Valley

FSW(SSR)

MODE

DRAIN

COMP

VCC

1.2V

OLPdetectorVcomp

EA

PWMlogicDriver

OLPLoop

Compen

OVP

FB-sation

FBsample&holdIOTPhiccup

GND

Temperature

Detection

Valley

ValleyOLP

DetecionSCP

MODESCP

OLPSlopedetector

Σcompensation

SCP

OVPhiccupVCS

protectionIPKsense

VCCOVP

UVLO

VDDDETECTION

VSSDEN

Classification

CLS

Logic&Regulation

UVLO

UVLOUVLO

detector

ControlLogic&

InrushandcurrentAPD

limit

Current

AMPSBlockT2P

AMPSsense

VSSRTN

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SQ34815

AbsoluteMaximumRatings(1)

PinsVoltageRespectstoVSS:

VDD,RTN,APD,T2P,DEN-------------------------------------------------------------------------------------------0.3Vto100V

(2)(2)

AMPS，CLS----------------------------------------------------------------------------------------------------------0.3Vto+5.5V

PinsVoltageRespectstoRTN:

VDD,T2P-----------------------------------------------------------------------------------------------------------------0.3Vto+100V

PinsVoltageRespectstoGND:

DRAIN--------------------------------------------------------------------------------------------------------------------0.3Vto+180V

VCC-------------------------------------------------------------------------------------------------------------------------0.3Vto+23V

MODE,COMP------------------------------------------------------------------------------------------------------------0.3Vto+3.3V

FB----------------------------------------------------------------------------------------------------------------------------0.3Vto+10V

UVLO-----------------------------------------------------------------------------------------------------------------------0.3Vto+15V

PinsCurrent:

FBSinkCurrent(3)-----------------------------------------------------------------------------------------------------------------±2mA

T2PSinkCurrent---------------------------------------------------------------------------------------------------------------------5mA

AMPSSourceCurrent--------------------------------------------------------------------------------------------------------------15mA

PackageThermalResistance

QFN4*5-28L,θJA-------------------------------------------------------------------------------------------------------------33.5°C/W

QFN4*5-28L,θJC(Junctiontotop)-------------------------------------------------------------------------------------------24°C/W

QFN4*5-28L,θJC(JunctiontoBottom)---------------------------------------------------------------------------------------7°C/W

JunctionTemperature--------------------------------------------------------------------------------------------------------------150℃

LeadTemperature------------------------------------------------------------------------------------------------------------------260℃

StorageTemperature---------------------------------------------------------------------------------------------------55℃to+150℃

RecommendedOperatingConditions

SupplyVoltageVDD--------------------------------------------------------------------------------------------------------0Vto57V

MaximumT2PSinkCurrent-------------------------------------------------------------------------------------------------------3mA

MaximumAMPSSourceCurrent------------------------------------------------------------------------------------------------13mA

MaximumFBSinkCurrent-------------------------------------------------------------------------------------------------------±1mA

OperatingJunctionTemperature（TJ）------------------------------------------------------------------------------40℃to+125℃

Notes：

(1)Exceedingtheseratingsmaydamagethedevice.

(2)Voltageshouldnotbeexternallyappliedtothispin.

(3)FBisclampedbyinternalcircuit.Thesink/sourcecurrentshouldbelimited.Detailinformationpleasereferto

“VoltageControl”section.

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SQ34815

ElectricalCharacteristics(interfacepart)

VDD,CLASS,DENandRTNvoltagesarereferredtoVSS,T2PvoltageisreferredtoRTN.VDD-VSS=48V,VSS=0V,

(4)

RDEN=24.9kΩ,RCLS=90.9Ω,TJ=-40℃to+125℃,typicalvaluesaretestedatTJ=25℃,unlessotherwisenoted.

ParameterSymbolTestConditionsMinTypMaxUnit

Detection

DetectiononVDEN_ONVDDrising0.81.11.4V

DetectionoffVDEN_OFFVDDrising10.11112.5V

DENLeakageCurrentVDEN_LKVDEN=VDD=57V,measureIDEN0.15µA

VDD=10.1V,floatDENpin,notin

BiasCurrent12µA

Markevent,measureISUPPLY

VDD=1.4V,measureISUPPLY53.855.658.3µA

DetectionCurrentIDEN

VDD=10.1V,measureISUPPLY395412425µA

Classification

13V<VDD<21V,

VCLASSOutputVoltageVCLASS2.372.52.63V

1mA<ICLASS<42mA

13V≤VDD≤21V,Nottestedinproduction,guaranteedbyVCLASS

RCLASS=1270Ω,13V≤VDD≤21V2

RCLASS=243Ω,13V≤VDD≤21V10.55

ClassificationCurrentICLASS

RCLASS=137Ω,13V≤VDD≤21V18.7mA

RCLASS=90.9Ω,13V≤VDD≤21V28.15

RCLASS=63.4Ω,13V≤VDD≤21V40.4

ClassificationLower

VCL_ONVDDrising,Classregulatorturnson111213

Threshold

Classificationupper

VVrising,Classregulatorturnsoff212223

ThresholdCL_OFFDDV

Lowsidehysteresis0.94

ClassificationHysteresisVCL_H

Highsidehysteresis0.5

MarkEventResetThresholdVMARK_L456V

MaxMarkEventVoltageVMARK_H10.21111.8V

MarkEventResistanceRMARK2-pointmeasureat7Vand10V6912kΩ

ICSupplyCurrentduring

IV=17.5V,CLASSfloating220280µA

ClassificationIN_CLASSDD

ClassLeakageCurrentILKVDD=57V,VCLASS=0V2µA

PDUVLO

VDDTurnonThresholdVDD_RVDDrising33.53536.5V

VDDTurnoffThresholdVDD_FVDDfalling293132V

VDDUVLOHyteresisVDD_HYS4V

ICSupplyCurrentduring

I290390490µA

OperationIN

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SQ34815

PASSDeviceandCurrentLimit

RDS_RTNIRTN=100mA,TJ=25℃0.450.55Ω

ONResistance

RDS_RTNIRTN=100mA,TJ=125℃0.65Ω

LeakageCurrentIRTN_LKVDD=VRTN=57V115µA

CurrentLimitILIMITVRTN=1V450570690mA

InrushCurrentLimitIINRUSHVRTN=2V45110175mA

InrushCurrentTerminationVRTNfalling1.11.21.3V

InrushtoOperationMode

T80100120ms

DelayDELAY

CurrentFold-backThresholdVRTNrising8.510.512.5V

Vrisingtoinrushcurrentfold-

Fold-backDeglitchTimeRTN0.851.11.35ms

back

APD

AdaptorDetectionThresholdVAPD_ENRespecttoVDD-1.3-1.5-1.7V

VoltageVAPD_HysRespecttoVDD0.5V

AMPS

MaintainPowerSignature

Startuphascompleted,I=0mA0.8mA

DCSupplyCurrentRTN

AutoMaintainPowerStartuphascompleted,I<15mA,

RTN2.5V

SignaturePulsedVoltageRMPS≥165Ω

Startuphascompleted,Ithreshold

AutomaticMaintainPowerRTN29mA

SignatureFallingtogenerateMPSpulses

CurrentThresholdHysteresisonRTNcurrent7mA

PoEMaintainPower

T85106127ms

SignatureTimeHighMPS-HIGH

PoEMaintainPower

TMPS-LOW173216259ms

SignatureTimeLow

ElectricalCharacteristics(Flybackpart)

(4)

AllvoltagesarereferredtoGND.TJ=-40℃to+125℃,typicalvaluesaretestedatTJ=25℃,unlessotherwisenoted.

ParameterSymbolTestCond