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时间:2018-12-04
《TI公司的汽车信息娱乐电源系统参考设计.doc》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、TI公司的汽车信息娱乐电源系统参考设计 TI公司的PMP15014是汽车信息娱乐电源系统参考设计,采用一级功率系统满足高输入电压的需求,并提供不同负载的低压多个输出,还提供瞬态和极性相反保护,工作频率2.1MHz,以避开AM频段,具有优异的EMI性能.参考设备选用LM53625-Q1/LM53635-Q1同步降压稳压器.本文介绍了LM53625-Q1/LM53635-Q1主要特性,功能框图,LM53635通用应用电路图和几种典型应用电路,以及汽车信息娱乐电源系统PMP15014主要特性,电路图,材料清单和PCB设计图. TheLM53625-Q1/LM53635-Q1sy
2、nchronousbuckregulatorisopTImizedforautomoTIveapplicaTIons,providinganoutputvoltageof5V,3.3V,oranadjustableoutput.Advancedhigh-speedcircuitryallowstheLM53625-Q1/LM53635-Q1toregulatefromaninputof18Vtoanoutputof3.3Vatafixedfrequencyof2.1MHz.Innovativearchitectureallowsthisdevicetoregulatea3.3
3、-Voutputfromaninputvoltageofonly3.55V.AllaspectsoftheLM53625-Q1/LM53635-Q1areoptimizedforautomotiveandperformance-drivenindustrialcustomers.Aninputvoltagerangeupto36V,withtransienttoleranceupto42V,easesinputsurgeprotectiondesign.Theautomotive-qualifiedHotrodQFNpackagewithwettableflanksreduc
4、esparasiticinductanceandresistancewhileincreasingefficiency,minimizingswitchnoderinging,anddramaticallyloweringelectromagneticinterference(EMI)。Anopen-drainresetoutput,withbuilt-infilteringanddelay,providesatrueindicationofsystemstatus.Thisfeaturenegatestherequirementforanadditionalsupervis
5、orycomponent,savingcostandboardspace.SeamlesstransitionbetweenPWMandPFMmodesandlowquiescentcurrent(only15µAforthe3.3Voption)ensurehighefficiencyandsuperiortransientresponsesatallloads. LM53625-Q1/LM53635-Q1主要特性: AEC-Q100AutomotiveQualified: DeviceTemperatureGrade1:–40℃to+125℃AmbientOpera
6、tingTemperatureRange DeviceHBMClassificationLevel2 DeviceCDMClassificationLevelC6 –40℃to+150℃JunctionTemperatureRange 15-µAQuiescentCurrentatnoLoad(Typical)with3.3-VOutput 4mm×5mm,0.5-mmPitchVQFNPackageWithWettableFlanksand0.6-mmVINSpacing LowEMIandSwitchNoise SpreadSpectrumOption E
7、xternalFrequencySynchronization RESETOutputwithInternalFilterand3-msReleaseTimer Pin-SelectableForcedPWMMode Built-InCompensation,SoftStart,CurrentLimit,ThermalShutdown,andUVLO 0.6-VDropoutat3.5Aat105℃TA ±1%OutputVoltageTolerance(–40℃to125℃TJ) Avai
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