张兴柱之MOSFET分析

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MOSFET1MOSFET1DSGDS)(ondsR2MOSFETMOSFET11MOSFET11DSGDSDSdV2MOSFETMOSFET21MOSFET21DSGDS)(ondsR2MOSFETMOSFETMOSFET1MOSFET1DSGDSossCoffV2MOSFETMOSFET1MOSFET1MOSFET/AKDSGdsIdsVgsVinVLRdsVdsI1gsV2gsVthgsVVdsLindsiRVV×-=MOSFETMOSFETMOSFET2MOSFET)(ondsLindRRVI+=3--gsVthgsVVthV3VthgsVVgsVgsVgsV12V-15V+-30V------Logic-LevelMOSFETgsV5V--2-4DC/DCMOSFET1MOSFET1DSGggVgsVDGSgsCdsCgdCchRdRgRiRdsidsV2MOSFETMOSFETMOSFETMOSFET1MOSFET1Li)(tvgs)(tidsDSGLIoffV)(tvds2MOSFETggVgsVdsiLIdsVd3toffV1t2t5t4tthV6t7t8t9t0t3[40~tt]--t0MOSFETt0MOSFET--[t0-t1]MOSFETGSVggCgst1VthMOSFET--[t1-t2]MOSFETDSMillierDSGS--[t2-t3]t2MOSFETDSVgsMillierMillierGSMillierDS--[t3-t4]t3MOSFETDSMillierGSGSt4GSDSMOSFET2[95~tt]--t5MOSFETt5MOSFET--[t5-t6]MOSFETCgst6MOSFETDSDS--[t6-t7]t6MOSFETMillierGSMillierDS--[t7-t8]t7MOSFETDSVgsMillierGSDSDS--[t8-t9]t8GSVthMOSFETGSMOSFET1MOSFET1Li)(tvgs)(tidsDSGLIoffV)(tvds2MOSFETLIoffVMOSFET)(tids)(tvdsrQ-0t1t2tMOSFET)()()(titvtpdsdson×=roffLtVI×≈offrVQ-orttt-=2tttLIoffV-MOSFET1MOSFET1)(2)(0)()(21ondsrsmddTondsdscondRidtRiTPs×=×=∫daveddTddscondVidtViTPs×=×=∫)(0)(12soffossoncfVCP2)(21=dgdsossCCC+=sLkfILPoffL221)(=∑=jjkLLMOSFET3∫×=40)()(1ttdxdssondttitvTPsroffrLoffttdxdssonfQVtIVdttitvTP)()()(121+=×=∫∫×=95)()(1ttdxdssoffdttitvTPsccgsgsfVCP221=MOSFET1MOSFET1AMOSFETB--MOSFET--MOSFETVdsIds20~30V10~50ADC/DC12V50~60V10~100A12V48VDC/DC100~200V10~50A48VDC/DC250~500V10~50A110V,220VAC/DC800~900V10A220V2AMOSFET----BDATASHEETMOSFETCMOSFETDMOSFET11KK2AKK----------------BKK--------3IonHLVoffHL--Ion--Voff112----------3------MOSFETIGBT11bceAKIGBTDSGMOSFET2DSGbceAKIGBTDSGMOSFET3bceAKGTOAKGDSG24AKG112--------MOSFETIGBTIGT/COMFETSIT--GTRGTO3----GTRIGBTIGT/COMFET--MOSFETSIT4--MOSFET--IGBT--GTO5--MOSFETSIT,JFET--IGBTGTRGTO11100100010000VA100101000MOSFETIGTIGBTBJTGTO2GTRGTOMOSFETOFFOFFOFF50V500V0V1500V3000V1200V50KHz10KHz20MHz

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