Texas Instruments LM5045 Handleiding

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Vout

T1

T1

Vin

ISOLATED

FEEDBACK

SSOFF

VCC

REFAGNDPGNDSSRESRT

UVLO

VIN

HO1BST1

HS1

LO1

CSLO2HS2

BST2HO2

COMP

LM5045 FULL-BRIDGE CONTROLLER

WITH INTEGRATED GATE DRIVERS

RD1RD2

GATE

DRIVE

ISOLATION

SR1

SR2

VCC

VCC

ISOLATION

BOUNDARY

SLOPERAMP

SSSR

OVP

Product

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LM5045

SNVS699H–FEBRUARY2011–REVISEDJANUARY2015

LM5045Full-BridgePWMControllerWithIntegratedMOSFETDrivers

1Features3Description

TheLM5045PWMcontrollercontainsallofthe

1

•HighestIntegrationControllerforSmallForm

featuresnecessarytoimplementfull-bridgetopology

Factor,High-DensityPowerConverters

powerconvertersusingeithercurrentmodeor

•High-VoltageStart-UpRegulator

voltagemodecontrol.Thisdeviceisintendedto

•IntelligentSyncRectifierStart-UpAllowsLinear

operateontheprimarysideofanisolatedDC-DC

converterwithinputvoltageupto100V.Thishighly

TurnonIntoPrebiasedLoads

integratedcontroller-driverprovidesdual2-Ahigh-

•SynchronousRectifiersDisabledinUVLOmode

sideandlow-sidegatedriversforthefourexternal

andHiccupMode

bridgeMOSFETspluscontrolsignalsforthe

•TwoIndependent,ProgrammableSynchronous

secondary-sidesynchronousrectifierMOSFETs.

RectifierDead-TimeAdjustments

Externalresistorsprogramtheleadingandtrailing

edgedead-timebetweenthemainandsynchronous

•FourHigh-Current2-ABridgeGateDrivers

rectifiercontrolsignals.Intelligentstart-upofthe

•Wide-BandwidthOptocouplerInterface

synchronousrectifiersallowsmonotonicturnonofthe

•ConfigurableforEitherCurrentModeorVoltage

powerconverterevenwithprebiasloadconditions.

ModeControl

Additionalfeaturesincludecycle-by-cyclecurrent

limiting,hiccupmoderestart,programmablesoft-

•Dual-ModeOvercurrentProtection

start,synchronousrectifiersoft-start,anda2-MHz

•ResistorProgrammed2-MHzOscillator

capableoscillatorwithsynchronizationcapabilityand

•ProgrammableLineUVLOandOVP

thermalshutdown.

2Applications

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

•E-Bike

HTSSOP(28)9.70mm×4.40mm

•Military:RadarandElectronicWarfare

LM5045

WQFN(28)5.00mm×5.00mm

•Power:TelecomDC-DCModule:Analog

(1)Forallavailablepackages,seetheorderableaddendumat

•PrivateBranchExchange(PBX)

theendofthedatasheet.

•SolarPowerInverters

•VectorSignalGenerators

•MicrowaveOvens

•Point-to-PointMicrowaveBackhaul

•Power:Telecom/ServerAC/DCSupply:Dual

Controller:Analog

•SolarMicro-Inverters

•TETRABaseStations

•WashingMachine:Low-End

SimplifiedFull-BridgePowerConverter

1

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

Product specificaties