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PWMPWM1PWMPWMPWMVDMOSPWM2PWM1,UgPWMPWMUinUout(b)(cd)Uout2UeUePWM2(e/a)Uref(Ue)2.1PWM(Voltage-modeControlPWM)3(a)BUCKPWMPWM603(a)CLPWMPWMLCPWM3(b)(RFFCFF)PWM2.2PWM(PeakCurrent-modeControlPWM)607080PWMUC3842UC38464UePWMUPWM()PWMPWM1U4PWMLCPWMPWM:50%50%2.3PWM(AverageCurrent-modeControlPWM)70PWM9090CPUdi/dt5(a)PWM1Ue(c/a)UcpUcurrent-programUi(c/a)UcpUiUcp(c/a)UcaUcaUTUsPWMUcaUiUcaUTUsUcaUTUs5(b)R-T48V/100A5(b)2.4PWM(HystereticCurrent-modeControlPWM)PWM26PWMUc(Uc=Ue)UchUcUhUhUchUoutUcUchUch6Uch1=Uch262.5PWM(Summing-modeControlPWM)7PWM33(e/a)C1LfCf,UiUeUPWMPWM35Ui31)PWMPWM2)PWM3)PWM,1PowerSupplyControlProducts(PS)DataBook,UnitrodefromTexasInstruments20002AnunciadaV,SilvaMNewConstant-FrequencyCurrentModeControlforPowerConverters,StableforallvaluesofDutyRatio,andUsableinAllFourQuadrants.IEEETransactiononIndustrialElectronics,1990,37(4)40453Lenk,RonSumming-ModeControl,PCIM,1999,(5):2435