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—。710068、。××、。ModularitydesignofDC/DCPSbasedonUCC2892DONGHui,MENGYing-wuAeronauticalComputingTechniqueResearchInstitute,Xi'anShanxi710068,China××DC-DC、。DC-DC。、、50～200WDC/DC。。。。/、ZVSSRT。1。12、345。UCC2892TI。、、、PWM、2。UCC2892、、1.0MHz。UCC2892P。MOS-FET。。、ZVS。[t1-t2]t1。ZVS。3。[t2-t3]。。Vaux。。4。[t3-t4]Qaux。。QmainDmain。。5。ZVS-Coss、。6Lmag、Llkg。Coss。VauxLlkgCoss1ZVSCoss2。Vaux1/2LmagI2mag+1/2LlkgI2lkg＞1/2(Coss1+Coss2)(Uin+Uc)2。 VmanCoss2Vaux。ZVSZVS。、。0.7V14%。。SRTMOS-FET。MOSFET。。。。。6。VFVRMOSFETVFVRVFVFVRVR。、、。UC=UIND/(1-D)+2I0LLKGfs/n(1-D)2Dfsn、I0。ILKGIPMAXIPMAX=P/DUIN+DUIN/2(LMAG+LLKG)fsΔUC=(1-D)IPMAX/4CCfsCcΔUcCcCcCcΔUcVMAN、VAUX、Cc。Cc。VmagImagCOss1UcCoss2VauxVAuxZVS。VauxCoss2ILKGt2-t1(Coss1+Coss2)UC/IPMAXt2-t1IPMAXLLKG/UC-nUOIpmaxt3Ucn、。VauxVmagILKGUIN+nUOt4-t3/ZVSSRTDC-DC16～40V5V/20A90%2.18W/cm30.1%0.8%-≤100mV20MHz××60mm×60mm×12.7mm、。7(a)、(b)。49～54V/。、。、8。8(a)、(b)。/ZVSSRT。28V5V20ADC/DC。[1].[M]..:,2004.[2]PRIETOR,GARCIAO,ASENSIR,etal.Optimizingtheperfor-manceofplanartransformer[J].IEEE,APEC,1996,5(1):112-132.[3]DAIN,LOTFIAW,SKUTTC,etal.Acomparativestudyofhighfrequencylowprofileplanartransformertechnologies[J].IEEE,APEC,1994,1(2):226-232.[4]PRIETOW,FREDCL,GUICHAOCH.Utizationofanactive-clampcricuittoachievesoftswitchinginflybackconvertersa[J].IEEE,1996,11(1):162-169.(a)- t/sV/V(b)- 28V5V20At/sV/V