集成功率放大器课件.ppt

1、第一章 功率电子线路 1.1 1.1 1.1 功率电子线路概述功率电子线路概述功率电子线路概述 1.2 1.2 1.2 功率放大器的电路组成和工作特性功率放大器的电路组成和工作特性功率放大器的电路组成和工作特性 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 jMCcCcTPiPiCTjM17515

2、0 PRTTth122TWCO1TthRthRCPCP 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 CQCCCCCDIVtdiVP2021cmcmCEQCEQLcmLCQLCLIVIVRIRItdRiP21212122220cmcmC

3、QCECCIVIViP212120%254121maxCQCCcmcmDOCIVIVPP 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 CQCCDIVP222DCQCCcmcmoLPIVIVPP22DcmcmCQC

4、CCPIVIVP%505.0DOCPP QOLCCPRV或CCcmCCCEVVVV2maxCQcmCQCIIIi2max0oPDCmzxPP)CEO(max2BRCCCEVVV2)(CEOBRCCVV CMCQCIIi 2max2CMCQIICMDCPPPmax222maxDCQCCcmcmCPIVIVP2maxCMoPP8)(maxCMBRoIVP maxCP iV1iV2iV1CLLiRv0iv2CLLiRv0iv 1T2T21EELiii0CEOI01CQICCCEQVV11T2T01CQICCCEQVV2 LR1LLLCELRRRiiR1t0tIicmCsin102Ci 2t01Cit

5、IicmCsin2tVVVcmCCCEcos1tVVVcmCCCEsin2tIiiiiRcmCCEELsin2121tVVcmLsinLcmcmRIV 222LcmcmcmoLRIIVPPLcmcmCCCOCCDDDRIIVIVPPP22122cmCOII,0)(satCEV0CEOICCcmVVLCCcmRVImaxooPPmaxDDPP LCCoRVP2max21maxmax4)(2oLCCCCDPRVVP%5.784maxmaxmaxDoCPP CCcmVVmax22222121oLCCLcmoPRVRVP oPDPCPDPCPmaxmax2max2max12.02ooCCPPPPCEO

6、BRCCCEVVv)(2CMLCCcmCIRVIimaxCMoCCPPPPmaxmax2max12.0 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RR21RR2C0ivvvBO

7、CivRbBiiBRRRR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 vvvORLii

8、RL2vVi2地LRiRivivivivRL4142422LCRivivZ222 vvi地ii2iiLRvvO2LRiRivivivRL41241422LCRivivZ21221 1Tr2TrvvvvvdAB2dvv21daiiibdiii )(21badiii)(21baiiibaciiii 2 tIiimbasintVvvmbasin0Cibadiii2dbavvvv2mmbaIVPPbammmmmmdPPIVIVIVP2220CPdddbbaaLRivivivR212 tIiimbasintVvvmbacosbaciii2200vidvvvba2mmbaIVPPbammcPPIVP2)2

9、(0dP CccbbaaLRivivivR22baiibavv cdcdbcdcdaaRRRRvRRRRvi44cdcdacdcdbbRRRRvRRRRvi44 dcRR41aiavbvbibvavcR22dRdcRR41tIimCsinaRbRbadbaCbadbadRRRRRiRRRRRii21 RRRba0dicbaiii210dv0vaRbRLCbaRRR22RRLCtIimdsinaRbR RRRba02iiCdbaiiiRRLd2LdbaRRR21baRR aRbR TrDLCLRtVvmsin2202vD2vLDCR充2vvvAO02ODvvvDLCLROLLvCR充放D 放电电

10、荷量充电电荷量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 nVVVVREFCEQIO5IVOVSOVV

11、OVOSOVnVV222CCQCIIIT 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 OILVVvoffOILtVVLi)(10LLii dVtTVVIoffIO11IAVV onILtVLi11LiOAVvoffOLtVLi110LLii ddVtTtVttVVIononIoffonIO15.0dIOVV5.0dIOVV5.0dIOVV R2RSVREFVVVVV1TVV1T REFSVV 1Tont1TvVVvREFSOontOOvddd)(