矿石收音机矿石收音机电路图及制法大全

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1、WideVISL85033INDualStandardBuckRegulatorWith3A/3AContinuousOutputCurrentISL85033FeaturesTheISL85033isadualstandardbuckregulator•WideInputVoltageRangefrom4.5Vto28Vcapableof3Aperchannelcontinuousoutputcurrent.•AdjustableOutputVoltagewithContinuousOutputWithaninputrangeof4.5Vto28V,

2、itprovidesahighCurrentupto3Afrequencypowersolutionforavarietyofpointofload•CurrentModeControlapplications.•AdjustableSwitchingFrequencyfrom300kHzto2MHzThePWMcontrollerintheISL85033drivesaninternal•IndependentPower-GoodDetectionswitchingN-ChannelpowerMOSFETandrequiresan•Selectabl

3、eIn-PhaseorOut-of-PhasePWMexternalSchottkydiodetogeneratetheoutputOperationvoltage.Theintegratedpowerswitchisoptimizedforexcellentthermalperformanceupto3Aofoutput•Independent,Sequential,RatiometricorAbsolutecurrent.ThePWMregulatorswitchesatadefaultTrackingBetweenOutputsfrequency

4、of500kHzanditcanbeuserprogrammed•Internal2msSoft-startTimeorsynchronizedfrom300kHzto2MHz.TheISL85033•Overcurrent/ShortCircuitProtection,ThermalutilizespeakcurrentmodecontroltoprovideflexibilityOverloadProtection,UVLOincomponentselectionandminimizesolutionsize.Theprotectionfeatur

5、esincludeovercurrent,UVLOand•BootUndervoltageDetectionthermaloverloadprotection.•Pb-Free(RoHSCompliant)TheISL85033isavailableinasmall4mmx4mmThinApplications*(seepage24)QuadFlatPb-free(TQFN)package.•GeneralPurposePointofLoadDC/DCPowerRelatedLiterature*(seepage24)Conversion•SeeAN1

6、574”ISL85033DUALEVAL1ZWideVIN•Set-topBoxesDualStandardBuckRegulatorWith3A/3AOutput•FPGAPowerandSTBPowerCurrent”•DVDandHDDDrives•LCDPanels,TVPower•CableModems100908012VOUT1MHz7060EFFICIENCY(%)50400.00.51.01.52.02.53.0OUTPUTLOAD(A)FIGURE1.EFFICIENCYvsLOAD,VIN=28V,TA=+25°CDecember8

7、,20101CAUTION:Thesedevicesaresensitivetoelectrostaticdischarge;followproperICHandlingProcedures.FN6676.21-888-INTERSILor1-888-468-3774

8、Intersil(anddesign)isaregisteredtrademarkofIntersilAmericasInc.CopyrightIntersilAmericasInc.2010.AllRightsReservedAllothertrademarksmentionedare

9、thepropertyoftheirrespectiveowners.ISL85033PinC