散热能力

SEMIKRON 1.4.4 IGBT MOSFET 1.5 SKiiPPACK MiniSKiiP SEMITOP 1.47 R Z 1.47 RC Rth 电源 技术 网 w w w .po we r-b bs. com 电源 论坛 w w w .di any uan bb s.c om . . . 1 2 3 4 5 6 7 8 9 Ptot RthSi ZthSi Tj RthSo1 ZthSo1 RthCu1 ZthCu1 RthIso ZthIso RthSo2 ZthSo2 RthBa ZthBa RthTc ZthTc Rthha Zthha RthCu2 ZthCu2 TC Ta R = R + R + R + R + R + R + R + Rthjh thSi thSo1 thCu1 thlso thCu2 thSo2 thBa thTc Z = Z + Z + Z + Z + Z + Z + Z + Zthjh thSi thSo1 thCu1 thlso thCu2 thSo2 thBa thTc Rthjc1 Zthjc1 Rthch1 Zthch1 Rthjcn. . . Zthjcn TC Th Rthchn. . . Zthchn Rthha Zthha Ta R th jh Z th jh , 电源 技术 网 w w w .po we r-b bs. com 电源 论坛 w w w .di any uan bb s.c om . . . Ptot R thSi Z thSi Tj R thSo1 Z thSo1 R thCu1 Z thCu1 R thIso Z thIso R thTc Z thTc R thha Z thha R thCu2 Z thCu2 Ta Th R = R + R + R + R + R + Rthjh thSi thSo1 thCu1 thlso thCu2 thTc Z = Z + Z + Z + Z + Z + Zthjh thSi thSo1 thCu1 thlso thCu2 thTc 1 2 3 4 5 8 9 Rthjh1 Zthjh1 Rthjhn. . . Zthjhn Rthha Zthha Ta Tj Ptot �Tjh = Tj - Th Tj Th Rthjh Zthjh 1.47 1.48 Rthjh Zthjh 1. 2. DCB 3. 4. 5. 6. 7. 电源 技术 网 w w w .po we r-b bs. com 电源 论坛 w w w .di any uan bb s.c om Rthch Zthch Rthjc Zthjc Rthjh = Rthjc + Rthch Zthjh = Zthjc + Zthch 1.48 Rthjc Al2O3 DCB IMS 56% 6% 8% 10% 20% Al2O3 Cu Si 82% 2% 3% 2% 11% Cu Si 20% 50% � = 24W/m*K DCB 96% 99% Al2O3 AlN � = 150W/m*K AlN Cu � = 393W/m*K 2.5 4.5mm DCB 1.49 a) b) 电源 技术 网 w w w .po we r-b bs. com 电源 论坛 w w w .di any uan bb s.c om DCB a) b) c) � = 75 W/m*K 50% Cu � = 393W/ m*K [194] 6.5mm*6.5mm Al2O3 15% 电源 技术 网 w w w .po we r-b bs. com 电源 论坛 w w w .di any uan bb s.c om 1.50 Rthjc IMS ; K=0,65 DCB (Al O ) ; K=0,76 DCB (AIN) ; K=0,96 2 3 10 1 0,1 0,01 10 100 1000A [mm ]Ch 2 R [K/W]thjc AlN Rthjc Ach Rthjc Ach � = 0.8W/m*K Rthch Rthch Rthjh 电源 技术 网 w w w .po we r-b bs. com 电源 论坛 w w w .di any uan bb s.c om 0 0,05 0,1 0,15 0,2 0,25 0,3 0 20 40 60 80 100 120 140 Rthca [K/W] ACh [mm 2] d= 50 m 30 m 20 m 10 m 5 m 1.51 30�m 50 IGBT 30% 9mm*9mm 30mm2 IMS 150mm2 Al2O3 [194] Al2O3 a = 0.58 • Ach 1.52 �� 电源 技术 网 w w w .po we r-b bs. com 电源 论坛 w w w .di any uan bb s.c om 0,0001 0,001 0,01 0,1 1 1,00E-05 1,00E-04 1,00E-03 1,00E-02 1,00E-01 1,00E+00 1,00E+01 56 mm2 81 mm2 121 mm2 t [s] Zthjc [K/W] Zthjc1(t) /Zthjc2(t) = Rthjc1/Rthjc2 = (ACh2/ACh1)K K 1.50 [194] IGBT 2.5 9 1.53 电源 技术 网 w w w .po we r-b bs. com 电源 论坛 w w w .di any uan bb s.c om