【技术】一文解析MOS管和三极管的功能差异

时间： 2022-02-24 来源：SLKOR

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MOS晶体管和三极管的功能区别是什么这两个元件本身可以看作是一个基本单元和一个独立的器件。即使把外壳拆开，肉眼也看不出有什么区别，从工作原理上理解起来很混乱。本文SLKOR将在本文中介绍MOS管和三极管的功能差异。

图 1

如果你用手同时触摸MOS管的G极(栅极)和正电源极，LED灯就会发光，即使你松开手，它也会继续发光。至于为什么会出现这种情况，可以简单理解为当G极的电位升高时，D极(漏极)和S极之间会形成一个导电通道(源极)，相当于一根导线。

导通时D极和S极之间的压降也可以用万用表量，计算，压降接近0V。如果用手同时触摸电源的G极和负极，LED灯就会熄灭。原因是频道被掐掉了，这和导通时正好相反。

如果MOS晶体管被三极管现象取代，还会是这样吗？更换的示意图是下图右侧的电路。其实是换成三极管的同时，触摸三极管的底座和电源的正极(相当于MOS管的栅极和电源的正极)会打开这个LED灯，但松开手后会立即关闭。

为什么和用MOS管不一样？让我们回忆一下三极管工作在放大状态时的情况：发射极结正向偏置，集电极结反向偏置。

如果用手同时触摸电源的底座和正极，这两个条件都满足，那么三极管就打开了，LED灯也亮了。如果此时手关了，集电极结的反向偏压还是满足的，但是发射极结的正向偏压不够，所以三极管会被切断，外部表现就是LED灯会熄灭。

由此我们也可以感受到，MOS管确实比三极管，更容易使用，确实MOS管与三极管，相比有很多优势，比如：
●MOS晶体管是压控器件，三极管是电流控制器件，所以MOS晶体管更节能。
●只有多数载流子参与MOS管的传导，三极管的多数载流子和少数载流子都参与传导，所以MOS管的热稳定性更好。
●MOS管的柔性比三极管管好
●MOS管在技术上更容易集成。
●MOS晶体管导通时的导通压降小(接近0 V，而三极管工作在大于0.3V的放大状态)。

MOS管与三极管的其他区别
●工作特点：电流控制三极管，电压控制MOS管。
●成本：三极管便宜，但MOS管贵。
●功耗：三极管损耗大，MOS管小。4.驱动能力：mos管常用于大电流的电源开关和局部开关电路。

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本文由三年不鸣转载自SLKOR，原文标题为:MOS管和三极管的功能差异，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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目录- 公司简介分立器件（二极管/三极管/MOS管/稳压电路）智能仓储

型号- SK22L,US2DF,M7L,US1BF,MB10S,40N15,DS28W,MM1Z6V2L,B0530WS,BZT52B7V5,US2DL,US1BL,MB10F,SD103AW,75N03,MMBT2907A,SS120F,US3GF,MMBT4401,DFLT15A,MM1Z4V7L,110P03,40N03,MMBT4403,SS18F,US5KL,US3GL,120N06,SMAJ9.0A,DFLT5V0A,30P03,8089D,DS26W,2SC5785,BZT52B6V2,ISS355,US3DF,PXT2222A,DFLT14A,17P10,BZT52B6V8,SK12L,US2BL,US2BF,2SB1260,8N65,1117,2SB1132,SMAJ8.0A,MMBD4148A,DFLT6V0A,2SA812,BZT52C7V5S,BZT52C8V2S,2SC3356,BAV19WS,BZT52C6V8S,MMBD2835,2SC3357,DFLT13A,MM1Z5V6L,US1AL,IRLML5103,US1AF,KTC3875,BAS716,2SB1386,S15GL,IN4448W,MMBT5401,MM1Z5V1L,BZT52B9V1,15N10,DS24W,SS24,2SA1036,DFLT12A,2SA1037,S15AL,US3BF,BZT52C5V6S,IN4007L,BYG10D,BZX84C62,2SA1162,BAS40-04,BYG10M,110N20,BAS521,IN4007W,BYG10K,SS14F,BYG10J,SS112F,BZX84C68,BYG10G,MM1Z4V3L,40P03,IN4006W,SS14,MM1Z3V6L,LM358,DFLT11A,2120,40P04,US2AL,BZT52C6V2S,ISS184,BAT46WS,US2AF,ISS187,IN4006L,G1A,7800,G1B,G1D,G1G,SS210F,BAS416,BZT52B8V2,G1J,16P03,LM321,ESD12VD3,2SA1015,DFLT10A,IRLML6402,IRLML6401,DS22W,2SA733,ZVN3310F,S15DL,TL432,6601,B0540WS,TL431,SS54,SS16F,SS110F,ZXMP10A13,SS36,SS34,A733,NTR2101P,S15BL,TL431L,BYG10Y,US3AF,SD103BW,SI4466DY,2SB1188,AO8205,TL431D,DFLT7V0A,BAT720,88N06,MM1Z3V9L,BAS516,2SC4375,BO520LW,20N06,2N7002D,20N03,100N10,2N7002A,IN4148W,MM1Z9V1L,IN4003W,DS210W,BAV20WS,PXT3904A,BAS20H,DS32W,B5819W,AO8814,BZX84C9V1,AO8810,IN4004WS,100N03,2N7002M,2N7002K,100N06,US1JF,IN4003L,RS3AF,RC4558,IN4002W,IN4148WS,IN4148WT,20N15,BAT54S,BAS21C,8789D,BZT52C5V1S,2281,BAT54H,B5818W,AO8822,AO8820,BAS21A,BAT54C,BAT54A,US2MF,US1KF,2SC945,IN4002L,LM393,DS212W,US2JL,MBR220L,US2JF,IN4005W,BAS70-04,A03421,IN4448WS,120N85,AO4314,AO4435,BZT52C4V7S,IN4005WS,AO4312,IN4005L,KTA1504,RS2AL,50N03,50N06,DB105S,MMBTH10,RS2AF,BZT52C3V9S,ISS400,IN4004W,US1B,US1A,2N10,AO8804,US1J,A03415,IN4004L,US1G,SK340LFL,US1D,SS212F,DB106S,SS115F,US2KF,170N03,RS3BF,A03419,US1K,S8550,180N06,BSS1S8,2SD1766,BSS123,18N03,3400DS,BZT52C2V7S,BZX84C7V5,IN4006WS,AO4490,AO4492,8608,MM1Z15L,MM1Z27L,DB103S,5352,BSS138,5353,SK13L,US1GF,BZT52C18S,30N03,AO4260,DB104S,MM1Z16L,IN4001W,US1DF,3N10,S1A,DS220W,6211,S1B,MM1Z8V2L,S1D,B5817W,S1G,BZT52C4V3S,US4JL,BZT52C3V6S,S1K,AO9926,S1J,B772,BAT54WS,BZX84C8V2,MMBT2222A,2SD965,3N06,BAT54W,BAS21S,DMN10H220L,6206,DB101S,S8205A,8886,US2GF,2SC1815,US2GL,BAT20J,B2T52B4V7,HT71XX,DW01,MM1Z6V8L,S8205,MM1Z7V5L,DB102S,MM1Z18L,S8205B,MM1Z22L,4054,BO530W,KTC4374,4056,BAS16X,MM1Z10L,KTC4379,2SC1766,KTC4378,PXT8050,BZT52C39S,AO3407,AO3401,2N65,BAS70,79L05,AO4854,AO3403,BZT52C27S,AO3404,BZT52C15S,79L08,79L09,AO4850,B5819WS,79L06,AO3400,AO4852,BZT52C3V0S,BZX84C5V1,RS2GF,B2X84C6V2,RS2GL,8783,MM1Z11L,AO3416,79M15,79M12,AO3415,RS1DL,ES1JL,DMN10H750S,RS1DF,MM1Z24L,ABS10,MM1Z12L,S3AF,RS1GF,75XX,2SC1623,2SC2712,2SD1664,2SC2714,AO4838,AO4832,AO4953,IN5818W,MM1Z2V0L,ES1JF,BZX84C6V8,35P02,12P03,8789,150N03,BAT46W,SMAJ14A,RS1GL,MM1Z13L,ABS04,2SD1898,ABS02,BZT52C2V4S,79L12,ABS08,AO4606,ABS07,ABS06,79L15,AO4842,BZT52C16S,1SS358,D882,BAR43,AO4840,ZVP3310F,SMAJ15A,HT73XX,A42,BZT52C11S,2SC1201,2SD1007,2SC1203,MM1Z30L,2SD1005,MB2F,MMBT3904,MMBT3906,ES1GF,BZX84C3V9,AO4410,RS1AL,BZX84C3V6,BAT54,ESDBLC5V0D3,MB2S,BZX84C3V0,B2X84C4V7,ES1GL,MMBD914,SMAJ12A,RS1AF,BZT52C10S,8223,S3BF,BZT52C22S,2SC1797,DS310W,AO4308,MB1F,1SS181,IN5817W,IN4001WS,HTK254,AO4304,AO4306,BAS40,RS2BL,AO4302,MB1S,SMAJ5.0A,XC6219,SMAJ13A,RS3DF,RS2BF,4N65,SI2316,2SC1662,2SC1661,2SC1664,MM1Z20L,MB4F,SI2315,2SC2873,73XX,S1AF,SI2312,45P02,SI2310,KTC3265,BAV21WS,AO3423,S8050,BZT52C13S,BCX51,IN4003WS,MMBD4148,BZX84C4V3,BCX53,BCX55,ES1EF,BCX54,MB4S,ES1EL,B2X84C5V6,BCX56,60N02,BAV20W,BC869,RS3GF,XC6206,SMAJ10A,S9013,SI2307,S9014,S9015,SI2305,DS215W,MM1Z33L,BZT52C12S,SI2303,S3DF,SI2301,US1ML,S9012,SI2302,SI2300,AO4407,BZT52C36S,AO3435,BZT52C24S,IN4002WS,AO4405,AO4882,RS1BL,RS2DL,BZT52C2V0S,SS8550,ES1DF,US1MF,ES1DL,RS2DF,BAV21W,HT75XX,S9018,SMAJ11A,RS1BF,BZT52B3V6,MM1Z3V3L,ZVP2110,RS1MF,RS1ML,12N65,MB6F,BZT52B3V9,SMAJ440,BZT52B3V0,MB6S,SMAJ6.0A,ES1CF,02N10,DFLT8V0A,ES2EF,BC846,HM4057D,ES2EL,BC848,A92,BC847,ES1CL,SS22F,CXT5551,150N85,BAV16W,MMBTA44,BAV16WS,MMBTA42,4056M,S1BF,BZT52C30S,ES2DF,ES1BF,BC857,4056H,BC856,S3GF,BC858,ES2DL,ES1BL,2N7002,BZT52B2V7,ES1C,MB8F,7N15,ES1D,1SS190,2SC1585,ES1E,71XX,BZT52C33S,M1F,ES1G,130N04,ES1J,BZT52B2V4,SK110L,BZX84C2V7,MB8S,ES2CF,BZX84C2V4,BZX84C2V2,S3JF,ES1AF,BZX84C2V0,ES1AL,SS24F,ES2A,SS12F,ES2B,ES2CL,ES2C,M2F,BZT52C20S,2SC1213,90N08,MM1Z2V7L,S1DF,KTK5132U,ES2BF,MMBT5551,ES2BL,DMN10H700S,4054H,ES1A,ES1B,M3F,8N03,BAV19W,MM1Z2V2L,MMBTA94,MMBTA92,MBR0530,BZT52B5V6,RS2KF,78M12,AO4810,BZT52B5V1,AO4812,78M15,IN5711W,BZT52B27,BAS70WS,ES2AF,ES2AL,M4F,BC807,BZT52B20,B5817WS,ES2D,BZT52C9V1S,ES2E,ES2G,ES2J,B0520WS,RS2JF,AO4826,DFLT51A,AO4822,8N10,78M05,78M06,78M09,78M08,DFLT9V0A,BAV23,RS2JL,S1GF,BC817,SS8050,2SC4672,S3KF,BZT52B30,ESD3V3D3,M5F,RS2MF,MM1Z2V4L,RS1KF,BO540W,BZT52B4V3,10N65,SS210,DMP10H4D2S,78L12,78L15,B5818WS,79M08,MMBT56,79M05,79M09,HKT251,ESD5V0D3,RS1KL,DMN24H3D5L,M6F,M6L,12N10,RS1JF,BZT52B18,AO4803,25P03,7N65,MM1Z3V0L,78L06,80N06,BZT52B10,78L05,140N10,BZT52B11,78L08,BZT52B12,BZT52B13,SMAJ7.0A,78L09,80N03,80N04,

合科泰电子 - 选型指南 - 2021 EDITION 代理服务技术支持批量订货