热设计技术规范

234111.111.211.31232.132.252.36373.173.294114.1114.2164.3174.4/225245.1245.2275.3275.4296307327.1327.2323341.11.21.2.11.2.21.2.31.2.41.2.51.2.61.2.71.31.3.1;1.3.2;1.3.34341.3.41.3.5()1.3.61.3.71.3.81.3.95342.12.1.1274055952.1.275%70%~95%2.1.3W/m22.1.41W/WK/W2.1.4.1Rjajunctionambient2.1.4.2Rjc2.1.4.3RjbPCB2.1.5DKBA0.400.0037REV.1.0W/m.KW/m.2.1.61W/m2.KW/m2.2.1.7()2.1.8In.water2.1.90~12.1.11Re(Reynlods)um/sDmm2/s2.1.12Pr(Prandtl)Pr2.1.13Nu(Nusseltl)hW/m2.DW/m.2.1.14DKBA0.400.0037REV.1.02.1.15()2.1.16()2.1.17u2.22.2.1(2-1)----W/m.KW/m.;A---m2----x;R-----,/W360W/m160W/m2.2.2(2-2)h----W/m2.KW/m2.;A---m2tw----;ta----;R-----,/W2.2.3(2-3)DKBA0.400.0037REV.1.0----12----;F12------1212A1---1m2;T1,T2--12K2.32.3.1PCBPCB2.3.22.3.330%2.3.42.3.5DKBA0.400.0037REV.1.0400.04W/cm23.13.1.13.1.213mm3.1.2.1d/L=0.253-1-(a);3.1.2.2,dmin=2.5mm,3-1-(b);3.1.2.3.,d/D=0.85,3-1-(c);3.1.2.4,d/D=0.7,3-1-(d);3.1.2.5,d/D=0.65,3-1-(e);DKBA0.400.0037REV.1.0Dd/D=0.7D(c)(d)dd(a)d/D=0.85d/L=0.25Ldd/D=0.65D(e)ddmin=2.5mm(b)dL319mm3.1.33~10W/m23.1.453.1.5110%3.1.6/DKBA0.400.0037REV.1.03.2(3-1)C---3-1g---9.8m/s2---1/Pr------m2/s---l---m3-1---W/m40(3-2)3-1C1.450.260.520.520.6m0.60.56lC25.4mm233.3mmX280mmX11.5W272-2(3-3)DKBA0.400.0037REV.1.0h3-23-1C0.56l0.233m3-3PCB30%1.355.30.04W/cm2DKBA0.400.0037REV.1.0-0.08W/cm24.1yyyyyyy,y21DKBA0.400.0037REV.1.0HUB43DKBA0.400.0037REV.1.047612087LUCENT454544565DKBA0.400.0037REV.1.0CISCO7513200CISCO12016109CDMA3U41U42UDKBA0.400.0037REV.1.0Motorola121413MotorolaCPX82161211DKBA0.400.0037REV.1.0Motorola1550mm40mm40mm44.24.2.1a.b./c.d.e.HUB50mmDKBA0.400.0037REV.1.04.2.2a.b.c.d./4.34.3.1AxialRadialMixed-flow4-14-1m3/hm3/minCFM/1CFM=4.72X10-4m3/sPain.ofwater(=249Pa)mmH2o(=9.8Pa)1/31/3DKBA0.400.0037REV.1.0HUBHUBNMBPAPSTDELTASONONPAPSTDNMBDELTA4.3.2(4-1)v4-110.7(0.01/0.2)40.5(0.01/0.2)180.3(0.01/0.2)1.590114-2DKBA0.400.0037REV.1.04-235m3/s30Pa30Pa4.3.3/4-330%34/4-44-3DKBA0.400.0037REV.1.04-44.3.44-540mm20mm4-54.3.54-6DKBA0.400.0037REV.1.030mm55dB65dBn10%n2n14-64.4/4.1DKBA0.400.0037REV.1.05/QQiTa/8~155~10m3/s(4-2)1005W/kg1.16kg/m3QW1m/s~2m/s0.5m/s2~3m/s(4-3)vDKBA0.400.0037REV.1.05.14.4QjunctionRjaRjcRjbPCB4.45-1Tj=Ta+Ta+Q%RjaTj,maxmaxmaxTa504555Rja(5-2)Q/WA/m2h/W/m2(5-3)bmD5-1/W/mRe(5-4)tjc=QRjc(5-5)Tj=Ta+Ta+tca+tjcTj,maxmaxmaxPCBPCBPCBBGAQFPPCBBGAQFPPCB50%PCBDKBA0.400.0037REV.1.0EDA*.idf5.35-1.bm0.50.661050.6210.2242500~150000.8040.0853000~150000.7310.2054000~150000.6240.5880.2610.2222500~7500(A)5000~100000(B)0.6990.6750.160.0922500~8000(A)5000~100000(B)0.8050.02440000~4000000.6180.1744000~400000.4660.61540~40000.3850.8214.0~40d1/20.330.8910.4~4.0DmbDKBA0.400.0037REV.1.00.80.032105AReiherBHilpert2N2905TO-5500.25W33/W901.3m/s5040~4000121.3m/s5.25.1.1PNPNDKBA0.400.0037REV.1.05.1.1.15.1.1.25.1.1.3PCB5.1.1.4PCB5.1.2PNPN5.3PCB5-15-1-Qt--------------WTj--------------Junctiontemp.Rjc--------------/WRcs--------------/WTs--------------Rsa--------------/WTa--------------/WDKBA0.400.0037REV.1.0(5-6)QtRjcTjTj,max(5-7)Rsa+RcsTj,maxmaxmax−TaQ−Rjc24X240.5/W5-75-3200400600800(LFM)45678910Rsa(C/W)5-3166LFMin/min200LFM1m/s120mm1~2m/s0.5~1.5m/s5.45.4.1DKBA0.400.0037REV.1.05.4.25.4.35.4.45.4.5DKBA0.400.0037REV.1.01.2.3.3a3b3c3dRja,Rjc,RjbPDF3ePCB3d4.4a/4b\4c4d5.6.7.PCB8.3dDKBA0.400.0037REV.1.09.10.()11.12.13.14.15.DKBA0.400.0037REV.1.0CFD1.2.3.4.5.6.1.GJB/Z27-9219927182.D.S.19893.“EquipmentFansforElectronicCooling,FunctionandBehaviorinPracticalApplication”,SiegfriedHarmsen,Verlagmoderneindustrie,19914.“ThermalAnalysis&DesignProcess”,AppliedThermalTechnologies,Inc.1992DKBA0.400.0037REV.1.0