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IRF公司MOSFET选型2

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Part Part StatusPackage VBRDSS (V)VGs Max (V)Circuit RDS(on) Max RDS(on) Max Qg Typ (nC) IRF7424PBF-Active SO-8-3020Discrete13.522.075IRF7205PBF-Active SO-8-3020Discrete70.0130.027IRF6216PBF-Active SO-8-15020Discrete240.033IRF7420PBF-Active SO-8-128Discrete14.038IRF6217PBF-Active SO-8-15020Discrete2400.06IRF9310PBF-Active SO-8-3020Discrete 4.6 6.8110IRLMS6702P Active TSOP-6 (Micr-2012Discrete200.0 5.8 Active Micro 3/ SOT-2012Discrete135.0 2.9IRLML2246TRActive Micro 3/ SOT-128Discrete50.010.0 IRLML6401TRActive Micro 3/ SOT-2012Discrete65.08.0IRLML6402TRActive Micro 3/ SOT-3020Discrete98.0165.09.5IRLML5203TRIRLML6302TRActive Micro 3/ SOT-2012Discrete600.0 2.4Active Micro 3/ SOT-3020Discrete600.01000.0 3.4IRLML5103TRIRF7410PBF-Active SO-8-128Discrete7.091.0IRF7425PBF-Active SO-8-2012Discrete8.287.0IRF7416PBF-Active SO-8-3020Discrete20.035.061.0IRF7404PBF-Active SO-8-2012Discrete40.032.7IRF7406PBF-Active SO-8-3020Discrete45.070.039.3 IRFHM9391Active and Pr PQFN 3.3 x 3-3025Discrete14.622.532.0IRF4905S Active D2-Pak-5520Discrete20.0120.0IRF9540NS Active D2-Pak-10020Discrete117.064.7IRF5210S Active D2-Pak-10020Discrete60.0120.0-3020Discrete 4.67.158.0IRFH9310Active and Pr PQFN 5 x 6 AIRFTS9342Active and Pr TSOP-6 (Micr-3020Discrete40.066.012.0IRLTS2242Active and Pr TSOP-6 (Micr-2012Discrete-32.012.0-3020Discrete 2.9 4.8130.0IRF9383M Active and Pr DirectFET MXIRFU6215Active I-Pak-15020Discrete58044IRFU5410Active I-Pak-10020Discrete20538.7IRFU9024N Active I-Pak-5520Discrete17512.7IRFU9120N Active I-Pak-10020Discrete48018IRLU9343Active I-Pak-5520Discrete10517031IRFU5505Active I-Pak-5520Discrete110.021.3IRFU5305Active I-Pak-5520Discrete6542IRLHS2242Active and Pr PQFN 2 x 2-2012Discrete31.012.0 IRLML2244Active and Pr Micro 3/ SOT-2012Discrete54.0 6.9IRLML2246Active and Pr Micro 3/ SOT-2012Discrete135.0 2.9IRFHS9301Active and Pr PQFN 2 x 2-3020Discrete37.065.0 6.9IRFHM9331Active PQFN 3 x 3-3025Discrete14.616.0IRF9392Active and Pr SO-8-3025Discrete17.514.0IRF9332Active and Pr SO-8-3020Discrete17.528.114.0IRF9333Active and Pr SO-8-3020Discrete19.432.514.0IRF9388Active and Pr SO-8-3025Discrete11.918.0IRF9335Active and Pr SO-8-3020Discrete59.0110.0 4.7IRF9393Active and Pr SO-8-3025Discrete19.414.0 IRLML9301Active and Pr Micro 3/ SOT-3020Discrete64.0103.0 4.8IRF9328Active and Pr SO-8-3020Discrete11.919.718.0 IRLML9303Active and Pr Micro 3/ SOT-3020Discrete165.0270.0 2.0IRF9321Active and Pr SO-8-3020Discrete7.211.234.0IRF9317Active and Pr SO-8-3020Discrete 6.610.231.0IRF9310Active and Pr SO-8-3020Discrete 4.6 6.858.0IRF7240Active SO-8-4020Discrete15.025.073.0IRF6218S Active D2-Pak-15020Discrete150.021.0 IRF7526D1Active Micro 8-3020with Schottky200.0400.07.5 IRF7416Q Active SO-8-3020Discrete20.035.061.0 IRF7425Active SO-8-2012Discrete8.287.0 IRF7410Active SO-8-128Discrete7.091.0 IRF9540NLActive TO-262-10020Discrete117.064.7 IRF5210L Active TO-262-10020Discrete60.0120.0 IRF5803Active TSOP-6 (Micr-4020Discrete112.0190.025.0 IRF5805Active TSOP-6 (Micr-3020Discrete98.0165.011.0 IRF5806Active TSOP-6 (Micr-2020Discrete86.08.3 IRF4905L Active TO-262-5520Discrete20.0120.0 IRF6216Active SO-8-15020Discrete240.033.0 IRF7726Active Micro 8-3020Discrete26.040.046.0 IRF7416Active SO-8-3020Discrete20.035.061.0 IRF9Z34NS Active D2-Pak-5520Discrete100.023.3 IRF9520NS Active D2-Pak-10020Discrete480.018.0 IRF6215S Active D2-Pak-15020Discrete290.044.0 IRF5305S Active D2-Pak-5520Discrete60.042.0 IRF9Z24NS Active D2-Pak-5520Discrete175.012.7 IRF9530NS Active D2-Pak-10020Discrete200.038.7 IRF9Z34NLActive TO-262-5520Discrete100.023.3 IRF7524D1Active Micro 8-2012with Schottky270.0 5.4 IRF7606Active Micro 8-3020Discrete90.0150.020.0 IRLMS5703Active TSOP-6 (Micr-3020Discrete200.0400.07.2 IRLMS6702Active TSOP-6 (Micr-2012Discrete200.0 5.8 IRF7406Active SO-8-3020Discrete45.070.039.3 IRF7241Active SO-8-4020Discrete41.070.053.0 IRLR9343Active D-Pak-5520Discrete105.0170.031.0 IRFR9024N Active D-Pak-5520Discrete175.012.7 IRFR5305Active D-Pak-5520Discrete65.042.0 IRF7420Active SO-8-128Discrete14.038.0 IRF5803D2Active SO-8-4020with Schottky112.0190.025.0 IRF7204Active SO-8-2012Discrete60.0100.025.0 IRF7205Active SO-8-3020Discrete70.0130.027.0 IRF7404Active SO-8-2012Discrete40.033.3 IRFR5410Active D-Pak-10020Discrete205.038.7 IRFR9120N Active D-Pak-10020Discrete480.018.0 IRFR6215Active D-Pak-15020Discrete580.044.0 IRF6217Active SO-8-15020Discrete2400.0 6.0 IRF7424Active SO-8-3020Discrete13.522.075.0 IRF7321D2Active SO-8-3020with Schottky62.098.023.0 IRFR5505Active D-Pak-5520Discrete110.021.3 SI4435DY Active SO-8-3020Discrete20.035.040.0 IRF7342D2Active SO-8-5520with Schottky105.0170.026.0 IRLIB9343Active TO-220 FullP-5520Discrete105.0170.031.0 IRFP9140N Active TO-247AC-10020Discrete117.064.7 IRLML5203Active Micro 3/ SOT-3020Discrete98.0165.09.5 IRLML5103Active Micro 3/ SOT-3020Discrete600.01000.0 3.4 IRLML6302Active Micro 3/ SOT-2012Discrete600.0 2.4 IRLML6402Active Micro 3/ SOT-2012Discrete65.08.0 IRLML6401Active Micro 3/ SOT-128Discrete50.010.0 IRF6218Active TO-220AB-15020Discrete150.021.0IRF5210Active TO-220AB-10020Discrete60.0120.0 IRF9520N Active TO-220AB-10020Discrete480.018.0 IRF9Z34N Active TO-220AB-5520Discrete100.023.3 IRF9530N Active TO-220AB-10020Discrete200.038.7 IRF9Z24N Active TO-220AB-5520Discrete175.012.7 IRF9540N Active TO-220AB-10020Discrete117.064.7 IRF4905Active TO-220AB-5520Discrete20.0120.0 IRF6215Active TO-220AB-15020Discrete290.044.0 IRF5305Active TO-220AB-5520Discrete60.042.0 IRFY9120Active TO-257AA-10020DiscretePower Dissip Rth(JC) (K/W Q ual Level MSL ID @ TC = 2550 (JA)Industrial150 (JA)Industrial150 (JA)Industrial150 (JA)Industrial150 (JA)Industrial150 (JA)Industrial175 (JA)Industrial1100 (JA)Industrial175 (JA)Industrial175 (JA)Industrial1100 (JA)Industrial1230 (JA)Industrial1230 (JA)Industrial150 (JA)Industrial150 (JA)Industrial150 (JA)Industrial150 (JA)Industrial150 (JA)Industrial1-3833 3.8Consumer1-741700.75Industrial1-23 3.8 1.1Industrial1-401700.75Industrial1-40 1.6Consumer262.5 (JA)Consumer162.5 (JA)Consumer1113 1.1Consumer1-9110 1.4Industrial-8.266 1.9Industrial-838 3.3Industrial-4.139 3.2Industrial-1479 1.9Industrial-1857 2.2Industrial-1889 1.4Industrial-159.613Industrial1100 (JA)Consumer1100 (JA)Consumer1-1313Industrial1-24 6.0Consumer150 (JA)Consumer150 (JA)Consumer150 (JA)Consumer150 (JA)Consumer150 (JA)Consumer150 (JA)Consumer1100 (JA)Consumer150 (JA)Consumer1100 (JA)Consumer150 (JA)Consumer150 (JA)Consumer150 (JA)Consumer150 (JA)Consumer1-272500.61Industrial1100 (JA)Consumer150 (JA)Automotive150 (JA)Consumer150 (JA)Consumer1 -23140 1.1Industrial-402000.75Industrial62.5 (JA)Consumer262.5 (JA)Consumer2 -4.0 2.062.5 (JA)Consumer2 -742000.75Industrial20Consumer170 (JA)Consumer150 (JA)Consumer1 1968 2.2Industrial1 -6.8 3.8 3.1Industrial1 -13110 1.4Industrial1 -31110 1.4Industrial1 -1245 3.3Industrial1 -14 3.8 1.9Industrial1 -1968 2.2Industrial100 (JA)Consumer170 (JA)Consumer175 (JA)Consumer175 (JA)Consumer150 (JA)Consumer150 (JA)Consumer1 -2079 1.9Industrial1 1138 3.3Industrial1 -2889 1.4Industrial150 (JA)Consumer162.5 (JA)Consumer150 (JA)Consumer150 (JA)Consumer150 (JA)Consumer1 1366 1.9Industrial1 -6.539 3.2Industrial1 13110 1.4Industrial120Consumer150 (JA)Consumer162.5 (JA)Consumer1 -1857 2.2Industrial150 (JA)Consumer162.5 (JA)Consumer1 -1433 3.84Industrial-21120 1.3Industrial100 (JA)Consumer1230 (JA)Consumer1230 (JA)Consumer1100 (JA)Consumer1100 (JA)Consumer1 -272500.61Industrial-402000.75Industrial -6.848 3.1Industrial -1756 2.7Industrial -1479 1.9Industrial -1245 3.3Industrial -23140 1.1Industrial -742000.75Industrial -13110 1.4Industrial -31110 1.4Industrial -5.3。

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IR公司 N沟60V MOSFET系列

IR公司 N沟60V MOSFET系列

Part Family Package CircuitPQFN 5 x 6 B Discrete IRFH5106HEXFET Power MOSFETsD2-Pak Discrete IRFS3806HEXFET Power MOSFETsTO-220AB Discrete IRFB3006G HEXFET Power MOSFETsIRF1010ES HEXFET Power MOSFETsD2-Pak DiscreteTO-262Discrete IRFSL3806HEXFET Power MOSFETsI-Pak Discrete IRFU1018E HEXFET Power MOSFETsIRFSL3206HEXFET Power MOSFETsTO-262DiscreteTO-220AB Discrete IRFB3206G HEXFET Power MOSFETsD-Pak Discrete IRFR3806HEXFET Power MOSFETsIRFH5206HEXFET Power MOSFETsPQFN 5 x 6 B DiscreteD2-Pak Discrete IRFZ48VS HEXFET Power MOSFETsTO-262Discrete IRF1018ESL HEXFET Power MOSFETsTO-262Discrete IRFSL3306HEXFET Power MOSFETsTO-247AC Discrete IRFP3206HEXFET Power MOSFETsTO-220AB Discrete IRFB3206HEXFET Power MOSFETsIRLR3636HEXFET Power MOSFETsD-Pak DiscreteD2-Pak Discrete IRFZ44ES HEXFET Power MOSFETsTO-220 FullPak (Iso)Discrete IRFI7536G HEXFET Power MOSFETsTO-220AB Discrete IRFZ44V HEXFET Power MOSFETsTO-247Discrete IRFP7530HEXFET Power MOSFETsTO-220AB Discrete IRFZ48V HEXFET Power MOSFETsD2-Pak 7-Lead Discrete IRFS3006-7P HEXFET Power MOSFETsD2-Pak Discrete IRFS3006HEXFET Power MOSFETsD2-Pak 7-Lead Discrete IRLS3036-7P HEXFET Power MOSFETsMicro 3/ SOT-23Discrete IRLML2060HEXFET Power MOSFETsD2-Pak Discrete IRLS3036HEXFET Power MOSFETsTO-247AC Discrete IRFP3306HEXFET Power MOSFETsD2-Pak Discrete IRFS3306HEXFET Power MOSFETsIRFH5006HEXFET Power MOSFETsPQFN 5 x 6 B DiscreteMicro 3/ SOT-23Discrete IRLML0060HEXFET Power MOSFETsTO-220AB Discrete IRFB3306HEXFET Power MOSFETsTO-220AB Discrete IRLB3036G HEXFET Power MOSFETsDirectFET MN Discrete IRF6648HEXFET Power MOSFETsSO-8Discrete IRF7478PBF-1HEXFET Power MOSFETsSO-8Discrete IRF7478HEXFET Power MOSFETsD2-Pak Discrete IRF1010EZS HEXFET Power MOSFETsIRFP3006HEXFET Power MOSFETsTO-247AC DiscreteTO-220AB Discrete IRFZ44VZ HEXFET Power MOSFETsIRF6674HEXFET Power MOSFETsDirectFET MZ DiscreteDirectFET L8Discrete IRF7749L2HEXFET Power MOSFETsTO-220AB Discrete IRFB3256HEXFET Power MOSFETsIRLU3636HEXFET Power MOSFETsI-Pak DiscreteTO-262Discrete IRFZ44EL HEXFET Power MOSFETsSO-8Discrete IRF7478Q HEXFET Power MOSFETsTO-220AB Discrete IRLB3036HEXFET Power MOSFETsD2-Pak Discrete IRFS3206HEXFET Power MOSFETsTO-220AB Discrete IRFB3006HEXFET Power MOSFETsTO-262Discrete IRF1010EZL HEXFET Power MOSFETsTO-220AB Discrete IRFB3306G HEXFET Power MOSFETsTO-220AB Discrete IRF1010EZ HEXFET Power MOSFETsTO-220AB Discrete IRF1010E HEXFET Power MOSFETsTO-262Discrete IRFSL3006HEXFET Power MOSFETsTO-220AB Discrete IRF1018E HEXFET Power MOSFETsDirectFET L8Discrete IRF7749L1HEXFET Power MOSFETsIRLSL3036HEXFET Power MOSFETsTO-262DiscreteDirectFET L6Discrete IRF7748L1HEXFET Power MOSFETsTO-257AA Discrete IRFY044HEXFET Power MOSFETsI-Pak Discrete IRFU3806HEXFET Power MOSFETsD2-Pak Discrete IRFZ44VZS HEXFET Power MOSFETsD2-Pak Discrete IRF1018ES HEXFET Power MOSFETsTO-220AB Discrete IRFB3806HEXFET Power MOSFETsTO-220AB Discrete IRFZ44E HEXFET Power MOSFETsPQFN 5 x 6 B Discrete IRLH5036HEXFET Power MOSFETsPQFN 5 x 6 B Discrete IRFH5406HEXFET Power MOSFETsSO-8Discrete IRF7855HEXFET Power MOSFETsD-Pak Discrete IRFR1018E HEXFET Power MOSFETsRDS(on) Max 10V (mOhm VBRDSS (V)VGs Max (V)RDS(on) Max 4.5V (mOhm6020 5.6602015.86020 2.5602012.0602015.860208.46020 3.06020 3.0602015.86020 6.7602012.060208.46020 4.26020 3.06020 3.060168.3 6.8602023.06020 3.4602016.56020 2.0602012.06020 2.16020 2.56016 2.2 1.96016640.0480.06016 2.8 2.46020 4.26020 4.26020 4.16016116.092.06020 4.26016 2.8 2.460207.0602030.026.0602030.026.060208.56020 2.5602012.0602011.06020 1.56020 3.460168.3 6.8602023.0602030.026.06016 2.8 2.46020 3.06020 2.560208.56020 4.260208.5602012.0 6020 2.5 60208.4 6020 1.5 6016 2.8 2.4 6020 2.2 602040.0 602015.8 602012.0 60208.4 602015.8 602023.0 6016 5.5 4.4 602014.4 60209.4 60208.4ID @ TC = 25C (A)ID @ TC = 100C (A)ID @ TA = 25C (A)ID @ TA = 70C (A) 1006321.01743312701908359433179562101502101504331895616.01372517956160110200140210150997048348673553928119972512932072701913002101.20.9327019016011016011010010021.0172.7 2.116011027019086697.0 5.67.6 6.1846027019057406713.410.7 20014033.0206172997048347.0 5.6270190210150270190846016011084608157270191795620014033.027019014810428.016164331574079564331483410010020.016 402511.0912.08.7 7956Qg Typ (nC)Qgd Typ (nC)Rth(JC) (C/W)Tj Max 50.017.0 1.1150 22.0 6.3 2.12175 200.060.00.40175 86.629.30.90175 22.0 6.3 2.12175 46.012.0 1.32175 120.035.00.50175 120.035.00.50175 22.0 6.3 2.12175 40.012.0 1.2150 73.324.0 1.00175 46.012.0 1.32175 85.026.00.65175 120.035.00.54175 120.035.00.50175 33.015.0 1.05175 40.015.3 1.4175 130.042.0 2.87175 44.716.7 1.3175 274.083.00.44175 73.324.0 1.00175 200.060.00.40175 200.060.00.40175 110.053.00.40175 0.670.4100 (JA)150 91.051.00.40175 85.026.00.67175 85.026.00.65175 67.021.00.50150 2.5 1.3100 (JA)150 85.026.00.65175 91.051.00.40175 36.014.0 1.4150 21.09.650 (JA)150 21.09.650 (JA)150 58.021.0 1.11175 200.060.00.40175 43.018.0 1.64175 24.08.3 1.4150 200.071.0 1.2175 130.042.00.50175 33.015.0 1.05175 40.015.3 1.4175 21.09.650 (JA)150 91.051.00.40175 120.035.00.50175 200.060.00.40175 58.021.0 1.11175 85.026.00.65175 58.021.0 1.1117586.629.30.90175 200.060.00.40175 46.012.0 1.32175 200.071.045 (JA)175 91.051.00.40175 146.740.0 1.6175 58.734.7 1.25150 22.0 6.3 2.12175 43.018.0 1.64175 46.012.0 1.32175 22.0 6.3 2.12175 40.015.3 1.4175 44.018.00.50150 23.07.1 2.7150 26.09.650 (JA)150 46.012.0 1.32175Power Dissipation @ TC Power Dissipation @ TA Part Status Qual Level 114 3.60Active and Preferred Industrial 71Active Industrial 375Active and Preferred Industrial 170Active Industrial 71Active Industrial 110Active Industrial 300Active Industrial 300Active and Preferred Industrial 71Active Industrial 100 3.60Active and Preferred Industrial 150Active Industrial 110Active Industrial 230Active Industrial 280Active Industrial 300Active and Preferred Industrial 143Active and Preferred Industrial 110Active Industrial 75Active and Preferred Consumer 115Active Industrial 341Active and Preferred Industrial 150Active Industrial 375Active and Preferred Industrial 375Active and Preferred Industrial 380Active and Preferred Industrial1.25Active and Preferred Consumer 380Active and Preferred Industrial 220Active Industrial 230Active and Preferred Industrial 250 3.60Active and Preferred Industrial1.25Active and Preferred Consumer 230Active and Preferred Industrial 380Active and Preferred Industrial 892.80Active and Preferred Consumer2.50Active and Preferred Industrial2.50Active Consumer 140Active Industrial 375Active and Preferred Industrial 92Active Industrial 893.60Active and Preferred Consumer 125 3.30Active Industrial 300Active and Preferred Industrial 143Active and Preferred Industrial 110Active Industrial2.50Active Industrial 380Active and Preferred Industrial 300Active and Preferred Industrial 375Active and Preferred Industrial 140Active Industrial 230Active and Preferred Industrial 140Active Industrial170Active Industrial 375Active and Preferred Industrial 110Active Industrial 125 3.30Active and Preferred Industrial 380Active and Preferred Industrial 94 3.30Active and Preferred IndustrialActive71Active Industrial 92Active Industrial 110Active Industrial 71Active Industrial 110Active Industrial 250 3.60Active and Preferred Industrial 46 3.60Active and Preferred Industrial2.50Active and Preferred Industrial 110Active IndustrialMSL Environmental Options A Package Cla1K Budgetary Pricing (USD)0.7401PbF Surface Moun0.4601PbF Surface MounPbF Thru-Hole 1.8080.8831PbF and Leaded Surface MounPbF Thru-Hole0.4601PbF Thru-Hole0.513PbF Thru-Hole 1.556PbF Thru-Hole 1.7060.3881PbF Surface Moun1PbF Surface Moun0.6381PbF and Leaded Surface Mount with LeadsPbF Thru-Hole0.750PbF Thru-Hole 1.539PbF Thru-Hole 1.275PbF Thru-Hole 1.6250.5401PbF Surface Moun1PbF Surface Moun0.8611PbF Thru-Hole 1.438PbF and Leaded Thru-Hole0.705PbF Thru-HolePbF and Leaded Thru-Hole0.8152.4191PbF Surface Moun2.1311PbF Surface Moun1PbF Surface Moun2.5550.0661PbF Surface Moun1PbF Surface Moun2.019PbF Thru-Hole 1.0881.6541PbF Surface Moun1PbF Surface Moun0.9290.1051PbF Surface MounPbF Thru-Hole 1.154PbF Thru-Hole 1.6861.6121PbF Surface Moun1PbF Surface Mount with Leads0.3661PbF Surface Moun0.8751PbF and Leaded Surface MounPbF Thru-Hole 1.822PbF Thru-Hole0.7401.0621PbF Surface Moun1PbF Surface Moun2.244PbF Thru-Hole 1.0411PbF Thru-Hole0.618PbF and Leaded Thru-Hole1PbF Surface Mount with LeadsPbF Thru-Hole 1.6061.6541PbF Surface MounPbF Thru-Hole 1.721PbF Thru-Hole0.875PbF Thru-Hole 1.211PbF and Leaded Thru-Hole0.875PbF and Leaded Thru-Hole 1.062PbF Thru-Hole 2.131PbF Thru-Hole0.7501.898 1PbF Surface MounPbF Thru-Hole 2.0191.522 1PbF Surface MounThru-Hole1PbF Thru-Hole0.3880.706 1PbF and Leaded Surface Moun0.750 1PbF Surface MounPbF Thru-Hole0.513PbF and Leaded Thru-Hole0.7601.480 1PbF Surface Moun0.483 1PbF Surface Moun0.562 1PbF Surface Moun0.488 1PbF Surface Moun。

MOSFET选型注意事项及应用实例

MOSFET选型注意事项及应用实例

MOSFET选型注意事项及应用实例MOSFET的选型基础MOSFET有两大类型：N沟道和P沟道。

在功率系统中，MOSFET可被看成电气开关。

当在N沟道MOSFET的栅极和源极间加上正电压时，其开关导通。

导通时，电流可经开关从漏极流向源极。

漏极和源极之间存在一个内阻，称为导通电阻RDS(ON)。

必须清楚MOSFET的栅极是个高阻抗端，因此，总是要在栅极加上一个电压。

如果栅极为悬空，器件将不能按设计意图工作，并可能在不恰当的时刻导通或关闭，导致系统产生潜在的功率损耗。

当源极和栅极间的电压为零时，开关关闭，而电流停止通过器件。

虽然这时器件已经关闭，但仍然有微小电流存在，这称之为漏电流，即IDSS。

作为电气系统中的基本部件，工程师如何根据参数做出正确选择呢？本文将讨论如何通过四步来选择正确的MOSFET。

1）沟道的选择。

为设计选择正确器件的第一步是决定采用N沟道还是P沟道MOSFET。

在典型的功率应用中，当一个MOSFET接地，而负载连接到干线电压上时，该MOSFET就构成了低压侧开关。

在低压侧开关中，应采用N 沟道MOSFET，这是出于对关闭或导通器件所需电压的考虑。

当MOSFET连接到总线及负载接地时，就要用高压侧开关。

通常会在这个拓扑中采用P沟道MOSFET，这也是出于对电压驱动的考虑。

2）电压和电流的选择。

额定电压越大，器件的成本就越高。

根据实践经验，额定电压应当大于干线电压或总线电压。

这样才能提供足够的保护，使MOSFET不会失效。

就选择MOSFET而言，必须确定漏极至源极间可能承受的最大电压，即最大VDS。

设计工程师需要考虑的其他安全因素包括由开关电子设备(如电机或变压器)诱发的电压瞬变。

不同应用的额定电压也有所不同；通常，便携式设备为20V、FPGA电源为20～30V、85～220V AC 应用为450～600V。

在连续导通模式下，MOSFET处于稳态，此时电流连续通过器件。

脉冲尖峰是指有大量电涌(或尖峰电流)流过器件。

MOS功率与选型

MOS功率与选型

品牌：美国的IR，型号前缀IRF；日本的TOSHIBA；NXP，ST（意法），NS（国半），UTC，仙童，Vishay。

MOS管选型指南.xls关于MOS选型第一步：选用N沟道还是P沟道低压侧开关选N-MOS，高压侧开关选P-MOS根据电路要求选择确定VDS，VDS要大于干线电压或总线电压。

这样才能提供足够的保护，使MOS管不会失效。

第二步：确定额定电流额定电流应是负载在所有情况下能够承受的最大电流。

与电压的情况相似，设计人员必须确保所选的MOS管能承受这个额定电流，即使在系统产生尖峰电流时。

MOS管并不是理想的器件，因为在导电过程中会有电能损耗，这称之为导通损耗。

MOS 管在“导通”时就像一个可变电阻，由器件的RDS（ON）所确定，并随温度而显著变化。

器件的功率耗损可由Iload2×RDS（ON）计算，由于导通电阻随温度变化，因此功率耗损也会随之按比例变化。

对MOS管施加的电压VGS越高，RDS（ON）就会越小；反之RD S（ON）就会越高。

第三步：确定热要求器件的结温等于最大环境温度加上热阻与功率耗散的乘积（结温=最大环境温度+［热阻×功率耗散］）。

根据这个方程可解出系统的最大功率耗散，即按定义相等于I2×RDS（ON）。

第四步：决定开关性能选择MOS管的最后一步是决定MOS管的开关性能。

影响开关性能的参数有很多，但最重要的是栅极/漏极、栅极/源极及漏极/源极电容。

这些电容会在器件中产生开关损耗，因为在每次开关时都要对它们充电。

MOS管的开关速度因此被降低，器件效率也下降。

详细的MOS管的选型可以参考资料3MOS管正确选择的步骤正确选择MOS管是很重要的一个环节，MOS管选择不好有可能影响到整个电路的效率和成本，了解不同的MOS管部件的细微差别及不同开关电路中的应力能够帮助工程师避免诸多问题，下面我们来学习下MOS管的正确的选择方法。

第一步：选用N沟道还是P沟道为设计选择正确器件的第一步是决定采用N沟道还是P沟道MOS管。

IRF场效应管技术参数

IRF场效应管技术参数

IRF场效应管技术参数1.输入电容：IRF场效应管具有较小的输入电容，这是因为它是一种高阻抗设备，能够有效地缩小对输入信号的负载作用。

这种特性使得IRF场效应管在高频应用中非常适用。

2.输出电容：IRF场效应管的输出电容较大，这是由于其结构与工作原理的特点决定的。

较大的输出电容可能导致较长的升降时间，对高频信号的响应产生一定的影响。

3.漏极电流：IRF场效应管在关闭状态时，漏极电流非常小，接近于零。

这保证了IRF场效应管能够有效地控制电流的流动，从而提高其开关特性和效率。

4.最大漏源电压：IRF场效应管的最大漏源电压是指其可以承受的最大工作电压。

这个参数主要取决于IRF场效应管的结构和选择的材料，通常在数十伏到数百伏之间。

5.最大漏电流：IRF场效应管的最大漏电流是指其可以承受的最大漏极电流。

这个参数通常在几安到几十安之间，取决于IRF场效应管的尺寸和结构。

6.开启压降：IRF场效应管在工作状态下的漏源电压与控制电压之间的差值被称为开启压降。

这个参数决定了IRF场效应管的开关特性和能耗。

7.导通电阻：IRF场效应管的导通电阻是指在导通状态下的漏源电压与漏极电流之间的比值。

这个参数对于评估IRF场效应管的导通特性和能效非常重要。

除了以上的技术参数，IRF场效应管还具有一些其他的特点，如：输入电压范围、工作温度范围、功耗、电阻温度系数等。

这些参数会因不同的IRF场效应管型号和应用场景而有所变化。

IRF场效应管常用于功率放大、开关电路、逆变器、变频器等电子设备和电路中。