IRS2092应用

IRIRS2092D类240瓦放大器方案关键词：消费类电子，音频放大器，D类放大器，MOSFET，摘要：IR公司的IRAUDAMP5D类240瓦音频3率放大器方案采用IRS2092SD类音频控制器和栅极驱动器和IRF6645DirectFETMOSFET。參考设计在1/8连续额定功率时不需要散热器，两路设计对于输出功率和路数可配置，广泛应用在AV接收器，家庭影院系统，大功率杨声器，低音喇叭，乐器放大器以及汽车电子放大器。本文介绍了IRS2092S和IRAUDAMP5參考设计的主要性能，方框图以及參考设计的多种应用电路。IR公司的IRAUDAMP5D类240瓦音频3率放大器方案采用IRS2092SD类音频控制器和栅极驱动器和IRF6645DirectFETMOSFET。參考设计在1/8连续额定功率时不需要散热器，两路设计对于输出功率和路数可配置，广泛应用在AV接收器，家庭影院系统，大功率杨声器，低音喇叭，乐器放大器以及汽车电子放大器。本文介绍了IRS2092S和IRAUDAMP5參考设计的主要性能，方框图以及參考设计的多种应用电路。IRS2092PROTECTEDDIGITALAUDIOAMPLIFIER主要特性：•IntegratedanaloginputClassDaudioamplifierdriverinasmall16pinpackage•Floatinginputsenableeasyhalfbridgeimplementation•Programmablebidirectionalover-currentprotectionwithself-resetfunction•ProgrammablepresetdeadtimeforimprovedTHDperformances•Startandstopclicknoisereduction•Highnoiseimmunity•±100Vratingsdeliverupto500Winoutputpower•Operatesupto800kHz•RoHScompliant典型应用：•Hometheatersystems•Minicomponentstereosystems•Poweredspeakersystems•Generalpurposeaudiopoweramplifiers图1.IRS2092方框图图2.IRS2092典型应用电路图IRAUDAMP5120Wx2ChannelClassDAudioPowerAmplifierUsingtheIRS2092SandIRF6645FeaturedKits图3.IRAUDAMP5參考设计外形图（两路120W半桥D类音频放大器）Two-channel120WHalf-bridgeClass-DAudioPowerAmplifierTheIRAUDAMP5referencedesignisatwo-channel,120Whalf-bridgeClassDaudiopoweramplifier.ThisreferencedesigndemonstrateshowtousetheIRS2092SClassDaudiocontrollerandgatedriverIC,implementprotectioncircuits,anddesignanoptimumPCBlayoutusingtheIRF6645DirectFETMOSFETs.Theresultingdesignrequiresnoheatsinkfornormaloperation(one-eighthofcontinuousratedpower).Thereferencedesignprovidesalltherequiredhousekeepingpowersuppliesforeaseofuse.Thetwo-channeldesignisscalableforpowerandthenumberofchannels.应用：AVreceiversHometheatersystemsMinicomponentstereosPoweredspeakersSub-woofersMusicalInstrumentamplifiersAutomotiveaftermarketamplifiers主要特性：OutputPower:120Wx2channels,TotalHarmonicDistortion(THD+N)=1%,1kHzResidualNoise:170μV,IHF-Aweighted,AES-17filterDistortion:0.005%THD+N@60W,4ΩEfficiency:96%@120W,4Ω,single-channeldriven,ClassDstageMultipleProtectionFeatures:Over-currentprotection(OCP),highsideandlowsideOver-voltageprotection(OVP),Under-voltageprotection(UVP),highsideandlowsideDC-protection(DCP),Over-temperatureprotection(OTP)PWMModulator:Self-oscillatinghalf-bridgetopologywithoptionalclocksynchronization主要指标：GeneralTestConditions(unlessotherwisenoted)Notes/ConditionsSupplyVoltage±35VLoadImpedance8-4ΩSelf-OscillatingFrequency400kHzNoinputsignal,AdjustableGainSetting26dB1VrmsinputyieldsratedpowerElectricalDataTypicalNotes/ConditionsIRDevicesUsedIRS2092SAudioControllerandGate-Driver,IRF6645DirectFETMOSFETsModulatorSelf-oscillating,secondordersigma-deltamodulation,analoginputPowerSupplyRange±25Vto±35VBipolarpowersupplyOutputPowerCH1-2:(1%THD+N)120W1kHzOutputPowerCH1-2:(10%THD+N)170W1kHzRatedLoadImpedance8-4ΩResistiveloadStandbySupplyCurrent±100mANoinputsignalTotalIdlePowerConsumption7WNoinputsignalChannelEfficiency96%Single-channeldriven,120W,ClassDstage.AudioPerformance*BeforeDemodulatorClassDOutputNotes/ConditionsTHD+N,1WTHD+N,10WTHD+N,60WTHD+N,100W0.009%0.003%0.003%0.008%0.01%0.004%0.005%0.010%1kHz,Single-channeldrivenDynamicRange101dB101dBA-weighted,AES-17filter,Single-channeloperationResidualNoise,22Hz-20kHzAES17170μV170μVSelf-oscillating–400kHzDampingFactor20001701kHz,relativeto4ΩloadChannelSeparation95dB85dB75dB90dB80dB65dB100Hz1kHz10kHzFrequencyResponse:20Hz-20kHz:20HN/A±1dB±3dB1W,4Ω-8ΩLoadz-35kHzThermalPerformanceTypicalNotes/ConditionsIdlingTC=30°CTPCB=37°CNosignalinput,TA=25°C2chx15W(1/8ratedpower)TC=54°CTPCB=67°CContinuous,TA=25°C2chx120W(Ratedpower)TC=80°CTPCB=106°CAtOTPshutdown@150sec,TA=25°CPhysicalSpecificationsDimensions5.8”(L)x5.2”(W)图4.IRAUDAMP5D类放大器简化方框图TheIRAUDAMP5usestheIRS2092S,ahigh-voltage(upto200V),high-speedpowerMOSFETPWMgeneratorandgatedriverwithinternaldead-timeandprotectionfunctionsspecificallydesignedforClassDaudioamplifierapplications.ThesefunctionsincludeOCPandUVP.Bi-directionalcurrentprotectionforboththehigh-sideandlow-sideMOSFETsareinternaltotheIRS2092S,andthetriplevelsforbothMOSFETscanbesetindependently.Inthisdesign,thedeadtimecanbeselectedforoptimizedperformancebyminimizingdeadtimewhilepreventingshoot-through.Asaresult,thereisnogate-timingadjustmentontheboard.SelectabledeadtimethroughtheDTpinvoltageisaneasyandreliablefunctionwhichrequiresonlytwoexternalresistors。图5.桥式连接图图6.D类子板IRS2092S模块CH1电路图图7.D类子板IRS2092S模块CH2电路图图8.D类子板IRS2092S模块电路图图9.D类主板音量控制和电源电路图图10.D类主板时钟和内部管理电路图表1.D类子板材料清单表2.D类主板材料清单