Texas Instruments LM5181-Q1 Bedienungsanleitung

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V

OUT

= 5 V

SW

FB

VIN

EN/UVLO

TC

GND

RSET

LM5181-Q1

C

OUT

C

IN

100 F

2.2 F

T

1

V

IN

= 4.5 V...65 V

3 : 1

D

FLY

R

SET

12.1 k:

R

FB

158 k:

D

Z

D

F

SS/BIAS

Output Current (mA)

Efficiency (%)

0100200300400500600700

60

65

70

75

80

85

90

D002

V

IN

= 12V

V

IN

= 24V

V

IN

= 36V

V

IN

= 48V

V

IN

= 65V

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Now

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LM5181-Q1

SNVSBN6–APRIL2020

LM5181-Q165-V

IN

PSRFlybackDC/DCConverterwith100-V,0.75-AIntegratedMOSFET

1

1Features

1

•AEC-Q100-qualifiedforautomotiveapplications

–Devicetemperaturegrade1:–40°Cto125°C

ambienttemperaturerange

•FunctionalSafety-Capable

–Documentationavailabletoaidfunctional

safetysystemdesign

•Designedforreliableandruggedapplications

–Wideinputvoltagerangeof4.5Vto65Vwith

operationdownto3.5Vafterstart-up

–Robustsolutionwithonlyonecomponent

crossingtheisolationbarrier

–±1.5%totaloutputregulationaccuracy

–OptionalV

OUT

temperaturecompensation

–6-msinternalorprogrammablesoftstart

–InputUVLOandthermalshutdownprotection

–Hiccup-modeovercurrentfaultprotection

––40°Cto+150°Cjunctiontemperaturerange

•Integrationreducessolutionsizeandcost

–Integrated100-V,0.4-ΩpowerMOSFET

–Noopto-couplerortransformerauxiliary

windingrequiredforV

OUT

regulation

–Internalloopcompensation

•High-efficiencyPSRflybackoperation

–Quasi-resonantMOSFETturn-offinBCM

–Lowinputquiescentcurrent

–Externalbiasoptionforimprovedefficiency

–Single-andmulti-outputimplementations

•Createacustomregulatordesignusing

WEBENCH

®

PowerDesigner

•Ultra-lowconductedandradiatedEMIsignatures

–Softswitchingavoidsdiodereverserecovery

–OptimizedforCISPR25Class5requirement

2Applications

•Sub-AMbandautomotivebodyelectronics

•AutomotiveHEV/EVpowertrainsystems

•Tractioninverters:IGBTandSiCgatedrivers

•Isolatedbiassupplies

3Description

TheLM5181-Q1isaprimary-sideregulated(PSR)

flybackconverterwithhighefficiencyoverawide

inputvoltagerangeof4.5Vto65V.Theisolated

outputvoltageissampledfromtheprimary-side

flybackvoltage,eliminatingtheneedforan

optocoupler,voltagereference,orthirdwindingfrom

thetransformerforoutputvoltageregulation.

Thehighlevelofintegrationresultsinasimple,

reliableandhigh-densitydesignwithonlyone

componentcrossingtheisolationbarrier.Boundary

conductionmode(BCM)switchingenablesacompact

magneticsolutionandbetterthan±1.5%loadand

lineregulationperformance.Anintegrated100-V

powerMOSFETprovidesoutputpowerupto4W

withenhancedheadroomforlinetransients.

TheLM5181-Q1converterisqualifiedtoautomotive

AEC-Q100grade1andisavailablein8-pinWSON

packagewith0.8-mmpinpitchandwettableflanks.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

LM5181-Q1WSON(8)4.00mm×4.00mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

TypicalApplicationTypicalEfficiency,V

OUT

=5V

Produktspezifikationen