矽力杰Silergy SY9228 28V输入单电感双向同步升降压稳压器 规格书(Datasheet)佰祥电子

SY9228

HighEfficiency,28VInput

SingleInductorSynchronousStepUp/DownRegulator

GeneralDescriptionFeatures

TheSY9228isahighvoltageBuck-boostconverterBidirectionalPowerDelivery:SourceModeand

forUSBpowerdeliveryapplications.Withuser-SinkMode

selectablesourcemodeandsinkmode,itfeatures4Vto28VInputVoltageRange

bidirectionalpowerdelivery.Insourcemode,theLowRDS(ON)forInternalSwitches:19mΩ

outputvoltageVcanbecontrolledin0.1Vper

VBUSInternalsoft-start

stepfrom3.6Vto21V.Insinkmode,theoutput

SupportInterruptforStatusFeedback

voltageVBATisadjustablewithanexternalresistor

divider.ThefourintegratedlowRDS(ON)switchesOptionalExternalP-channelFETDriver

minimizetheconductionloss.CableImpedanceCompensation

TheSY9228integratesanI2Ccompatibleinterface8-bitADCforOutputVoltage,InputVoltage

formodeselecting,outputvoltagesetting,frequencyandOutputCurrentDetection

setting,protectionsetting,andetc.FullyProtectedforOutputOverCurrent,Short-

ThedeviceisavailableincompactQFN5×5-32circuitandOver-temperature

package.I2CCompatibleInterface

SupportInterruptforStatusFeedback

SelectableSwitchingFrequency:

OrderingInformation250kHz,500kHz,750kHz,1MHz

SY9228□(□□)□VBUSOutputVoltagecanbeConfiguredin

TemperatureCode0.1VperStepfrom3.6Vto21V

PackageCodeSelectableInductorCurrentLimitand

OutputCurrentLimit

OptionalSpecCode

CompactPackage:QFN5×5-32

OrderingNumberPackagetypeNoteULCertificateNumberE491480

SY9228QECQFN5×5-32IEC62368-1Certified

Applications

DockingStation

Laptop

PowerBank

Monitor

USBPD

TypicalApplication

3.3µH

CC

BS1L1BS2Optional

100nF100nF

RQ1RQ2

BS1LX1LX2BS2RSENCE

VBAT:4~28V10mΩVOUT

BATVBUS

RFB1Q1Q2

CKCOUT

IN110K

30µF30µFPFET

FB

RFB2REN1

10K10K

ENSENSE+

REN2

1MSY9228SENSE-

2SDA

ICinterfaceGATE

{SCL

Bi-directionalcontrolsignalFRSSOURCE

RFS

ADDR

10KDISCHARGE

RADDRRDISCHARGE

10K1K

COMP

InterruptindicatorINTR

CZ

P10K

RINT10pF

10KVCCBIASPGNDSGND

CZ

2.2nF

CVCCCBIAS

4.7µF1µF

Figure1.TypicalSchematicDiagram

SY9228Rev.1.0SilergyCorp.Confidential-PreparedforCustomerUseOnly1

©2025SilergyCorp.AllRightsReserved.

SY9228

Pinout(TopView)

D

D

S

N

N

T

U

1

2

2

1

A

G

G

B

X

X

X

X

B

L

P

P

L

L

L

V

3231302928272625

BS1124BS2

BAT223VBUS

BAT322VBUS

PGND

LX1421LX2

EN520DISCHARGE

FRS619SOURCE

BIAS718GATE

ADDR817SENSE+

910111213141516

-

T

P

B

L

D

C

A

E

F

N

C

N

C

M

D

I

S

S

V

S

G

O

N

S

C

E

S

(QFN5×5-32)

TopMark:BQRxyz(Devicecode:BQR,x=yearcode,y=weekcode,z=lotnumbercode)

PinNamePinNumberDescription

Boot-strappin.Supplyhighsidegatedriver.Recommendtoconnecta0.1μF

BS11

ceramiccapacitorbetweenthispinandtheLX1pin.

Powerinput/outputpin,decouplethispintoPGNDwithatleasta22μF

BAT2,3,32ceramiccapacitor.Thispinispowerinputinsourcemodeandpoweroutput

insinkmode.ThispinisalsooneofthethreeLDOinputs.

LX14,30,31Inductorconnection1.

ICEnablecontrolpin,logichighenable.Thispinisinternallypulledhighby

EN5

200nApull-upcurrent.

Fastroleswappin.Oncetherisingedgeisdetected,the‘BidirectionalMode’

bit(0x01[4])isautomaticallyinvertedandthe‘VBUSOutputVoltage

Setting’register(0x02)isautomaticallyresetto‘0x32’.WhiletheFRSpinis

logichigh,the‘BidirectionalMode’bitand‘VBUSOutputVoltageSetting’

FRS6

registercannotbechangedviatheI2Cinterface.AftertheFRSpinislogic

low,theI2Cinterfaceresumesnormaloperation.Inbidirectionalmode,an

external10kΩpull-lowresistorisrecommended.Connectthispintoground

directlyifworkinginsourcemodeonly.Donotleaveitfloating.

OneoftheinternalVCCLDO'sinput.BIASpinisusedastheVCCLDO's

inputwhenvoltageonthispiniswithin4Vto6V,otherwisetheBATpinor

BIAS7theSOURCEpin,whichevervoltageishigher,isselectedastheLDO'sinput.

DecouplethispintoPGNDwithaminimumof1μFceramiccapacitor.Leave

thispinfloatingifitisnotused.

Thedeviceaddresssetpin.Groundthispintoselect0x70,connectthispinto

GNDwithanexternalresistortoselect0x71(RADDR=91kΩ)or

ADDR8

0x72(RADDR=470kΩ),andfloatthispinorconnectthispintoVCCtoselect

0x73.

3.3VLDOoutput,powersupplyforinternaldriverandcontrolcircuits.

VCC9

DecouplethispintoSGNDwithaminimumof1μFceramiccapacitor.

SY9228Rev.1.0SilergyCorp.Confidential-PreparedforCustomerUseOnly2

©2025SilergyCorp.AllRightsReserved.

SY9228

PinNamePinNumberDescription

VBATfeedbackpin.Connectthispintothecenterpointoftheoutputresistor

FB10dividertoadjusttheBATvoltageinsinkmode.VBAT=1V×(1+RTOP/RBOT)

ConnectthispintoVCCdirectlyifworkinginsourcemodeonly.

COMP11Compensationpin.ConnectRCnetworkbetweenthispinandSGND.

SGND12Signalground.

SDA13I2CInterfaceserialdatapin.Logiclevelinput/output.

SCL14I2CInterfaceserialclockpin.Logiclevelinput.

TheINTpinisanopen-drainoutput.Whenaninterrupteventhappens,the

INTpinisinternallypulledlowtoinformthehost.Afterthehostreadsthe

INT15

interruptregister,theINTpinisexternallypulledhigh.A10kΩpull-up

resistorisrecommended.

Outputcurrentsense“-”input.Theregulatoralsousesthisforsensingoutput

SENSE-16

voltage.

Outputcurrentsense“+”input.Recommendtoconnecta10mΩresistor

SENSE+17

RSENSEbetweenSENSE+andSENSE-todetectoutputcurrent.

GatedriveroftheexternalP-channelFET.TheuseofexternalPFETis

optional,ifnotused,leaveGATEpinfloating.TheGATEmustbeactivated

GATE18

viatheI2CinterfacewhereitcanturnonorturnoffthePFET.Thedefault

stateistohavethePFETturnedoff.

ThesourceofexternalPFET.ThispinisalsooneofthethreeLDOinputs.If

SOURCE19

theexternalPFETisnotused,connectthispintoSENSE-directly.

Outputdischargepin.Connectaresistorbetweenthispinandthepower

DISCHARGE20outputtoprogramthedischargecurrent.Themaximumdischargecurrent

shouldbelittlethan150mA.

LX221,26,27Inductorconnection2.

Powerinput/outputpin,decouplethispintoPGNDwithatleasta22μF

VBUS22,23,25ceramiccapacitor.Thispinispoweroutputinsourcemodeandpowerinput

insinkmode.

Boot-strappin.Highsidegatedriversupply.Recommendtoconnecta0.1μF

BS224

ceramiccapacitorbetweenthispinandtheLX2pin.

28,29

PGNDPowerground.

ExposedPad

SY9228Rev.1.0SilergyCorp.Confidential-PreparedforCustomerUseOnly3

©2025SilergyCorp.AllRightsReserved.

SY9228

BlockDiagram:

BS1LX1LX2BS2

SW1SW4

BATVBUS

TG1TG2

CurrentCurrent

BG2

senseBG1SW3sense

VoltageSW2

sense

SOURCE

BIASSelect

VCCLDO

SCLVBUSoutputSENSE+

Controlandcurrentsense

Protection

SDAI2C

InterfaceVBUSSENSE-

INTVoltagesense

ADDRGATE

SOURCE

FB

EA

RefCOMP

Ipull-upDISCHARGE

EN

FRSSGNDPGND

Figure2.BlockDiagram

AbsoluteMaximumRatings(Note1)

BAT,LX1,LX2,VBUS,SENSE+,SENSE-,FB,EN,SDA,SCL,DISCHARGE,GATE,SOURCE,FRS,COMP--

----------------------------------------------------------------------------------------------------------------------------0.3Vto30V

BS-LX,ADDR,VCC,INT--------------------------------------------------------------------------------------------0.3Vto4V

BIAS-----------------------------------------------------------------------------------------------------------------------0.3Vto7V

PowerDissipation,PD@TA=25°CQFN5×5-32-------------------------------------------------------------------------3.8W

PackageThermalResistance(Note2)

θJA----------------------------------------------------------------------------------------------------------------26°C/W

JC----------------------------------------------------------------------------------------------------------------2.8°C/W

JunctionTemperatureRange------------------------------------------------------------------------------------------------150°C

LeadTemperature(Soldering,10sec.)-----------------------------------------------------------------------------------260°C

StorageTemperatureRange--------------------------------------------------------------------------------------65°Cto150°C

RecommendedOperatingConditions(Note3)

BATVoltage-----------------------------------------------------------------------------------------------------------4Vto28V

VBUSVoltage----------------------------------------------------------------------------------------------------------4Vto28V

BIASVoltage----------------------------------------------------------------------------------------------------------4Vto6V

JunctionTemperatureRange-------------------------------------------------------------------------------------40°Cto125°C

AmbientTemperatureRange--------------------------------------------------------------------------------------40°Cto85°C

SY9228Rev.1.0SilergyCorp.Confidential-PreparedforCustomerUseOnly4

©2025SilergyCorp.AllRightsReserved.

SY9228

ElectricalCharacteristics

(VBAT=12V,VVBUS=12V,TA=25°C,unlessotherwisespecified)

ParameterSymbolTestConditionsMinTypMaxUnit

BATVoltageRangeVBAT428V

VBUSVoltageRangeVBUS428V

VBUSStepVoltageVBUS_STEPSourcemode100mV

BIASVoltageRangeVBIAS46V

LDOVoltageVCCILDO=50mA3.123.33.46V

VBIAS=0V5085120mA

LDOCurrentLimitILMT_LDO

VBIAS=5V100170240mA

QuiescentCurrentIQNoswitching450650µA

ShutdownCurrentISDICisdisabled510µA

FeedbackReferenceVoltageVREFSinkmode0.98511.015V

FBInputCurrentIFB-5050nA

Sourcemode,VBUSvoltageset

VBUSVoltageSet-pointV11.821212.18V

BUS,SET12V,0x02[7:0]='78'

OutputOVPThresholdVOUT,OVP0x03[4:3]=’10’120%VOUT,SET

InternalPowerMOSFET

RDS(ON)19mΩ

RDS(ON)

InductorAverageCurrentLimitIAVG0x04[7:6]='00'6A

InductorPeakCurrentLimitIPK0x04[7:6]='00'6.88.811.1A

VBUS/BATInputUVLO

V3.33.53.7V

ThresholdUVLO

UVLOHysteresisVHYS0.2V

ENLogicHighThresholdVENHRising1.5V

ENLogicLowThresholdVENLFalling0.5V

0x03[7:5]='000'159.5mV

0x03[7:5]='001'51014.5mV

0x03[7:5]='010'101519.5mV

0x03[7:5]='011'152024.5mV

OutputCurrentLimitV

OUT.ILIM0x03[7:5]='100'253034.5mV

0x03[7:5]='101'364044mV

0x03[7:5]='110'465054mV

0x03[7:5]='111'566064mV

OscillatorFrequencyfOSC0x01[6:5]='01'425500575kHz

MinONTimetON_MIN150ns

ThermalShutdown

T150°C

TemperatureSD

ThermalShutdownHysteresisTHYS15°C

Soft-startTimetSSSourcemode,VVBUS=5V1.5ms

Sourcemode,slewrateset

SlewRate2mV/μs

2mV/us

DischargeTurn-onResistanceRDISC10Ω

GateDriver

GATELowClampVSOURCE--VGATE7V

GATESinkCurrent30μA

GATEPullUpResistance100Ω

ADCControl

ADCResolution8Bits

ADCVoltageSenseAccuracyVBAT=23V-55%

ADCCurrentSenseAccuracyVRSENSE=50mV-88%

VBATFullScaleRange025V

VBUSFullScaleRange025V

SY9228Rev.1.0SilergyCorp.Confidential-PreparedforCustomerUseOnly5

©2025SilergyCorp.AllRightsReserved.

SY9228

ParameterSymbolTestConditionsMinTypMaxUnit

SenseCurrentFullScaleRange060mV

I2CCompatibleInterface

MaximumOperatingFrequency400kHz

SDAandSCLInputLogicLogic_L0.8V

ThresholdLogic_H2V

SDAOutputLowVoltage3mAsinkcurrent0.4V

Note1:Stressesbeyondthe“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Theseare

stressratingsonly.Functionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedinthe

operationalsectionsofthespecificationisnotimplied.Exposuretoabsolutemaximumratingconditionsfor

extendedperiodsmayaffectdevicereliability.

Note2:θJAismeasuredinthenaturalconvectionatTA=25°Conafour-layerSilergyevaluationboard.

Note3:Thedeviceisnotguaranteedtofunctionoutsideitsoperatingconditions.

SY9228Rev.1.0SilergyCorp.Confidential-PreparedforCustomerUseOnly6

©2025SilergyCorp.AllRightsReserved.

SY9228

TypicalPerformanceCharacteristics

(fsw=500kHz，TA=25°C)

Efficiencyvs.OutputCurrent

(Sourcemode,L=3.3μH/PCMB104T3R3MS)OutputVoltagevs.InputVoltage

10012.10

90

12.09

80