模拟电路讲义

1、第一章 功率电子线路 1.1 功率电子线路概述 1.2 功率放大器的电路组成和工作特性1.3 乙类推挽功率放大电路1.4 功率合成技术1.5 整流与稳压电路 1.1.1功率放大器（Power Amplifier） 放大电路甲、乙类互补对称功率电路乙类互补对称功率放大甲类放大电路)()()(cba电路组成由两个差动输出的电路单电源加电藕合电路OCLBTLOTL,)( cCOODOcPPPPP.,功率管的耗散功率输出信号功率直流电源功率CODPPP c 丁丙乙甲CCCC CMP管子烧坏最高允许值结温结温结温 jMCcCcTPiPiCTjM175150 PRTTth122TWCO1TthRthRCP

2、CP thaJMCMRRTPCMPthRCPCPaT CEOBRceVV)(CEOBRceVV)(cceiV, cceiVceTiT间形成低阻通道在热点晶格熔化密度引起,SBP c 0)(satCEVLCCLCEQCQCCCEQCQCCCEQRVRVIVVIVV2, 2, 0, 20CEOI tIIiIicmCQCCQccostVVVVVcmCEQceCEQCEsinLCEQLcmcmCCCEQcmRVRVIVVV, 2 CQCCCCCDIVtdiVP2021cmcmCEQCEQLcmLCQLCLIVIVRIRItdRiP21212122220cmcmCQCECCIVIViP212120%25

3、4121maxCQCCcmcmDOCIVIVPP LR CCVQ被限定2CCCEQcmVVV不会提高。否则CbCLiQiR,相匹配的输入称为将与到几十几必须LbLORiRP,)( 21WWn LLRnR2,CCCEQVV,BQBIi,CQCIiCCCEQCEVVV LCceRiVceCEQCEVVVCCQCiIi)-(CQCLCEQCEIiRVV0(sat)CEV0CEOItIIicmCQCcostVVVcmCEQCEcos,CCCEQVVVcmLCCLcmCQcmRVRVII CQCCDIVP222DCQCCcmcmoLPIVIVPP22DcmcmCQCCCPIVIVP%505.0DOCPP

4、 QOLCCPRV或CCcmCCCEVVVV2maxCQcmCQCIIIi2max0oPDCmzxPP)CEO(max2BRCCCEVVV2)(CEOBRCCVV CMCQCIIi 2max2CMCQIICMDCPPPmax222maxDCQCCcmcmCPIVIVP2maxCMoPP8)( maxCMBRoIVP maxCP iV1iV2iV1CLLiRv0iv2CLLiRv0iv 1T2T21EELiii0CEOI01CQICCCEQVV11T2T01CQICCCEQVV2 LR1LLLCELRRRiiR1t0tIicmCsin102Ci 2t01CitIicmCsin2tVVVcmCCC

5、Ecos1tVVVcmCCCEsin2tIiiiiRcmCCEELsin2121tVVcmLsinLcmcmRIV 222LcmcmcmoLRIIVPPLcmcmCCCOCCDDDRIIVIVPPP22122cmCOII, 0)(satCEV0CEOICCcmVVLCCcmRVImaxooPPmaxDDPP LCCoRVP2max21maxmax4)(2oLCCCCDPRVVP%5 .784maxmaxmaxDoCPP CCcmVVmax22222121oLCCLcmoPRVRVP oPDPCPDPCPmaxmax2max2max12 . 02ooCCPPPPCEOBRCCCEVVv)(2CM

6、LCCcmCIRVIimaxCMoCCPPPPmaxmax2max12 . 0 CMCEOBRoIVP)(max41CMoPP5 max BELCEBELCBEOiVRiVRiVVV 0Bi)ln(222SRTBBBBBEQBEQIIVVVVVSI BEVRCII3)ln()ln(33SRTSCTBEIIVIIVV电流源电流RI303BI2123RRRVVBBBE)1 (213RRVVBEBB BBV3BEV1R2RCQBBBEIVVT阻止32CCV2CCV 21,TT1R2R1R1T1RV1T3T3T2T RR直iRRR交2CCcmVV直交RR21RR2C0ivvvBOCivRbBiiBRR

7、RR交iR1T2T21RR CCV 8LRVVcm10WPo25.6%,10THD%5 . 0THDVVcm8WPo4%2 . 0THDVVcm7WPo3 1211RRAfv342RRAfv21fvfvAAtVvomosin1tVvomosin2tVvvvcmooosin221212244)21(4)2(21ooLcmLcmoPPRVRVP LRdRcR dRcRbaRRaRbRaRbR Hf0LflCLSZRR CZCZHfl,/1038minmfH)10181(lminvvv21iii21400100 LXfOiOii viXOL,初OiviRiXfOSOL vvvORLiiRL2vVi2

8、地LRiRivivivivRL4142422LCRivivZ222 vvi地ii2iiLRvvO2LRiRivivivRL41241422LCRivivZ21221 1Tr2TrvvvvvdAB2dvv21daiiibdiii )(21badiii)(21baiiibaciiii 2 tIiimbasintVvvmbasin0Cibadiii2dbavvvv2mmbaIVPPbammmmmmdPPIVIVIVP2220CPdddbbaaLRivivivR212 tIiimbasintVvvmbacosbaciii2200vidvvvba2mmbaIVPPbammcPPIVP2)2(0dP Cc

9、cbbaaLRivivivR22baiibavv cdcdbcdcdaaRRRRvRRRRvi44cdcdacdcdbbRRRRvRRRRvi44 dcRR41aiavbvbibvavcR22dRdcRR41tIimCsinaRbRbadbaCbadbadRRRRRiRRRRRii21 RRRba0dicbaiii210dv0vaRbRLCbaRRR22RRLCtIimdsinaRbR RRRba02iiCdbaiiiRRLd2LdbaRRR21baRR aRbR TrDLCLRtVvmsin2202vD2vLDCR充2vvvAO02ODvvvDLCLROLLvCR充放D 放电电荷量充电电荷量

10、LOCv放充qqOvOvOvODiiOoavIiRIVOOOILLCROV LCLRLCOLVRLR充、放电速度、放充LC纹波略OVmOmDVVVV222反 22IV02221tdiIIbd2i1D2D2v1D2D2v1DLCLRLCOiOVLLCR 2vOVOI2v31DD、42DD 、2v31DD、LC2v42DD 、31DD、2v42DD 、LCOOIV 、 Tr2i OVOI5T5CEIOVVV5CEV5T 41 TTREFVSVOSVRRRV212SVREFVREFSVV REFOVnV)(212RRRnn2T52,TVCQ5CEQV nVVVVREFCEQIO5IVOVSOVVOV

11、OSOVnVV222CCQCIIIT 管222CCQCVVV2T55BBQBIII55CECQCEVVVOVSVREFV 恒值IVOOVVVS恒值、OIIVOOIVVS 恒值IVOOOIVRORISOIOVOROIISOILROI恒值恒值IOIVOOOIVOOIVRIVVS, 输出纹波电压输入纹波电压ripS单位温度变化恒值,IOVIOOTVVSREFV I CEQV SD21CLbvovIAvvAv1LLiLi)()(onDAvOvAvIV21CLIonIAdVTtVV1Ttdon offonttTAV21CLLRIAOdVVVLiOVOIOALVVVVvtLLdtvLi011 onOILtVVLi)(11OLAvvv , 0LioffOLtvLi)(110LLiiIOdVV IVd0VOOVd 1dIOVV0AvILVV onILtVLi1LiOAvv OILVVvoffO