矽力杰 Silergy SY5040 反激控制器 规格书 Datasheet 佰祥电子

SY5040

CCM+QRModeSSRFlybackController

GeneralDescriptionFeatures

TheSY5040isapeakcurrentmodeSSRFlybackRatedSwitchingFrequency:65kHz

controllerthatcombinesCCMandQRmodetogetherCCM+QRCombinedOperatingMode

tominimizetransformersizeandachievehighFrequencyFoldBackandBurstModeControl

efficiency.Underlowlineandheavyloadcondition,MinimumSwitchingFrequencyLimitedto25kHz

theSY5040worksunderCCM,whileunderhighline

FSWModulationtoReduceEMINoise

ormediumloadcondition,itworksunderQRmodeProgrammableBrownoutProtectionbyZCSPin

(valleyswitching).TheSY5040adoptsfrequencyfold-ProgrammableOutputOVPbyZCSPin

backcontrolwhentheloaddecreasestoachievethe

ProgrammableExternalOTPbyCSPin

highaverageefficiency.Whentheloaddecreasesto

OLP,VCCOVP,InternalOTP

verylightlevel,theSY5040willenterburstmodeand

theswitchingfrequencyisfixedto25kHztoavoidSecondaryDiodeShortCircuitProtection

audiblenoise.OCPCompensationoverUniversalInputRange

LowStartupCurrent:<4A

TheSY5040alsoprovidescomprehensiveandGateDriveCapability:210mA/420mA(source/sink)

reliableprotectionsincludingbrownoutprotection,InternalSoftStartProcess

outputOVP,externalOTP,OLP,VCCOVP,internalRoHSCompliantandHalogenFree

OTP,etc.CompactPackage:SOT23-6

TheSY5040isavailablewithacompactSOT23-6

package.

Applications

AC/DCPowerSupply

NoteBookAdapter

LCDTV

AuxiliaryPowerSupply

LVO+

NVO-

GNDGATE

COMPVCC

ZCSCS

optional

Fig.1.TypicalApplicationCircuit

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SY5040

OrderingInformationPinout(topview)

Ordering

PackagetypeTopMark

PartNumberGND16GATE

SOT23-6

SY5040ABCRoHS-CompliantandYaxyzCOMP25VCC

Halogen-Free

x=yearcode,y=weekcode,z=lotnumbercodeZCS34CS

PinDescription

PinNoPinNamePinDescription

1GNDGroundpin

2COMPThispinisconnectedtoanopto-couplerforoutputvoltagefeedback

Multi-functionincludingvalleydetecting,brownoutprotectionandoutput

3ZCS

OVP

4CSPrimarypeakcurrentsensepin,alsousedforexternalOTP

5VCCPowersupplypin

6GATEGatedrivepin

BlockDiagram

VDDLDO

outputvoltageoutputOVP

ZCSVCC

detecting

VCC

monitor

BOGATE

valleydetectingBUSvoltage

detectingclamp

UVLO

VCCOVP

VDDPseudofixedCCM+QRPWM

oneshotSQlogicunitGATE

frequencycontrolcontrol

RQ

OLP

current

mirrorswitchingfrequency

OLP

foldbackcontrolVDD

PWMdebounce

timer

leadingedge

COMP

CSblanking

oneshot

PWMVCOMP_OLP

peakcurrent

control

GND

counterexternalOTP

oneshot

(N=4)

VCS_OTP

Fig.2BlockDiagram

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SY5040

AbsoluteMaximumRatings

Parameter(Note1)MinMaxUnit

VCC-0.334

GATE-0.315V

CS,COMP,ZCS-0.33.6

SupplyCurrentIVCC20mA

JunctionTemperature,Operating-45150

LeadTemperature(Soldering,10sec.)260°C

StorageTemperatureRange-65150

DynamicCSNegativeCurrentin1usDuratio-2mA

DynamicCSNegativeVoltagein1usDuration-0.7V

DynamicZCSNegativeCurrentin20usDuration-2mA

DynamicZCSNegativeVoltagein20usDuration-0.7V

ThermalInformation

Parameter(Note2)MinMaxUnit

θJAJunction-to-ambientThermalResistance125

°C/W

θJCJunction-to-caseThermalResistance60

PDPowerDissipationTA=25°C1.1W

RecommendedOperatingConditions

ParameterMinMaxUnit

VCC1227V

JunctionTemperatureRange-40125°C

AmbientTemperatureRange-40105°C

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SY5040

ElectricalCharacteristics

(Note3)

(VVCC=12V,TA=25°Cunlessotherwisespecified)

ParameterSymbolTestConditionsMinTypMaxUnit

Turn-onThresholdVVCC_ON2021.523V

Turn-offThresholdVVCC_OFF8910V

OVPThresholdVVCC_OVP27.729.731.7V

CurrentSinkunderOver

VoltageConditionIVCC_OVPVVCC=VCC_OVP+0.1V11mA

VCCPin

StartUpCurrentIVCC_STVVCC=18V2.64µA

OperatingCurrentIVCC_OPTCL=1nF,FSW=65kHz1.9mA

QuiescentCurrentIVCC_QUndersleepmode200270µA

CurrentSinkunderFault

ConditionIVCC_FAULT0.811.3mA

MaximumPeakCurrent

SenseVoltageVCS_MAX0.920.971.03V

PrimaryOCPThresholdVCS_OCP1.241.311.38V

LeadingEdgeBlanking

TCS_LEB470ns

Time

ExternalOTPThresholdVCS_OTP0.9411.06V

IZCS=500µA90105120µA

CSPin

OCPCompensationIZCS=400µA90µA

ICS_OCPC

CurrentIZCS=300µA64µA

IZCS=200µA36µA

CSPinShortCircuit

VCS_SCP100mV

ProtectionThreshold

CSPinShortCircuit

TCS_SCP_BLK3.5µs

DetectingBlankingTime

OutputOVPThresholdVZCS_OVP1.922.1V

BlankingTimeforVOUT

SenseafterVGATEJumpsTVOSEN_BLK1.62.63.6µs

fromHightoLow

ZCSPinBrownOutThreshold

IBO90100110µA

Current

HysteresisforBrownInIBO_HYS10µA

BrownOutDebounceTimeTBO_DBC5590125ms

RatedSwitchingFrequencyFSW_RATE606570kHz

MinimumSwitching

FSW_MIN202530kHz

SwitchingFrequency

FrequencyModulation

FrequencyFSWMOD_AMPVCOMP=1.8V,CCM±6.5kHz

Amplitude

FrequencyModulation

TSWMOD4ms

Period

COMPInternalPull-upVoltageVCOMP_PU2.7V

InternalPull-upResistorRCOMP_PU20kΩ

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SY5040

ThresholdtoEnterSleep

VCOMP_INSLEEPVCOMPfallingdown0.250.30.35V

Mode

ThresholdtoExitSleep

VCOMP_EXSLEEPVrisingup0.370.420.47V

COMPModeCOMP

OLPThresholdVCOMP_OLP2.02.252.5V

OLPDebounceTimeTOLP_DBC5590125ms

GateClampVoltageVGATE_CLAMPVVCC=20V14V

MaximumSourceCurrentISOURCE_MAXCL=10nF210mA

GATEPin

MaximumSinkCurrentISINK_MAXCL=10nF420mA

MaximumONTimeTON_MAX13µs

InternalInternalOTPThresholdTOTP140°C

OTPHysteresisTHYS15°C

SoftStartSoftStartTimeTSS7ms

Note1:Stressesbeyondthe“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Thesearestressratingsonly.

Functionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedintheoperationalsectionsofthespecification

isnotimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayaffectdevicereliability.

Note2:θJAismeasuredinthenaturalconvectionatTA=25°ConaloweffectivesinglelayerthermalconductivitytestboardofJEDEC

51-3thermalmeasurementstandard.Testcondition:Devicemountedon“2x2”FR-4substratePCB,2ozcopper,withminimum

recommendedpadontoplayerandthermalviatobottomlayergroundplane.

Note3:IncreaseVCCpinvoltagegraduallyhigherthanVVCC_ONvoltagethenturndownto12V.

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SY5040

TypicalPerformanceCharacteristics

(Testcondition:VIN:90~264Vac;outputspec:20Vdc_3.25A;outputcable:18AWG_1.8m;TA=25±5℃)

SteadyStatesSteadyStates

(VIN=90VAC,Io=3.25A)(VIN=264VAC,Io=3.25A)

VDS50V/divVDS100V/div

Time(10µs/div)Time(10µs/div)

BrownOutProtectionBrownOutProtection

(VIN=90VAC60VAC90VAC,Io=3.25A)(VIN=90VAC60VAC90VAC,Io=0.5A)

VIN100V/divVIN100V/div

VO10V/divVO10V/div

VGATE10V/divVGATE10V/div

Time(1s/div)Time(1s/div)

AverageEfficiencyvs.InputVoltage

91

90

89

88

Average(cableend)

87Level6

AverageEfficiency(%)EfficiencyAverage

86

90115230264

InputVoltage(VAC)

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SY5040

protectionlevel.Inputvoltagebrownoutlevel(RMS)

DetailedDescriptioniscalculatedasbelowequation:

CCM+QROperatingPrincipleIN

VRBOP

TheSY5040adoptsthemixedcontrolmethodthatcombinesIN_BOH

2NA

CCMandQRmodetogether.Underlowinputvoltageand

heavyloadcondition,itwilloperateunderCCM.UnderhighBUSVO+

inputvoltageormediumloadcondition,itwilloperateunder

QRmode.Duetothiscontrolmethod,theoptimizedefficiencyVIN

andtransformersizecanbeachieved.NPNS

OCPCompensation

VO-

Generally,OCPlevelunderlowinputvoltageconditionis

RH

lowerthanthatunderhighinputvoltagecondition.The

ZCS

SY5040adoptsOCPcompensationfunctiontomaketheNA

RL

variationofOCPleveloveruniversalinputvoltagerangetoGATE

besmaller.Thecompensationisachievedbyaddinga

resistorROCPCbetweenCSpinandpeakcurrentsense

resistor.ThelargerROCPCis,thelowerOCPlevelunderhighProgrammableOutputOVP

inputvoltagewillbe.ThiscompensationresistorROCPCwillbe

adjustedbycustomersfortheirspecifiedpowerconverterTheSY5040willsenseoutputvoltagebyZCSpin

design.andprogrammableoutputOVPcanbeachieved.

WhentheprimarypowerMOSisturnedoff,the

BUSVO+voltageonauxiliarywindingwillbeproportionalto

outputvoltage.TheZCSpinwillsensetheoutput

VINvoltagebyaresistordividerconnectedbetween

N

PNSauxiliarywinding.WhentheZCSpinvoltagerises

aboveOVPthresholdVZCS_OVP,theICwillstop

VO-switchingandenterauto-recoverymode.Theoutput

OVPthresholdiscalculatedasbelow:

GATENSRRHL

VVO_OVPZCS_OVP

CSNRAL

ROCPC

Note:TheupperresistorRHshouldbedetermined

firstlyaccordingtoinputbrownoutlevelsetpoint,

andthenthelowerresistorRLofZCSpinresistor

ProgrammableBrownOutProtectiondivideriscalculatedaccordingtoaboveequation.

TheSY5040willsensetheBUSvoltagebyZCSpinand

BUSVO+

programmablebrownoutprotectioncanbeachieved.When

theprimarysidepowerMOSisturnedon,theZCSpinwillbeVIN

internalclampedto0V,sincethevoltageonauxiliarywindingNPNS

(negative)isproportionaltoBUSvoltage,thecurrentflowout

ofZCSpinwillbeproportionaltoBUSvoltage.TheSY5040

willcomparethecurrentflowoutofZCSpinwithaninternalVO-

referencecurrent(typical100uA),ifthecurrentflowoutofRH

ZCS

ZCSpinislowerthanthereferencecurrent,atimerwillbeginNA

tocount,andwhenthetimerelapse,brownoutprotectionwillRL

GATE

betriggered,theICwillstopswitchingandenterauto-

recoverymode.DuringtheVinstart-up,whentheVCCrises

toVCC_ONthreshold,theGATEpinwillturnonprimaryMOS

WhentheprimarypowerMOSisturnedoff,there

forashortduration(~2us)andtheICwillidentifyiftheinput

willbeaparasiticresonanceonauxiliarywinding

v