PFC THD Reduction and Efficiency Improvement by ZVS or Valley Switching

Texas Instruments

Published Date: 04/26/2012

Description

When a PFC is in discontinuous conduction mode the inductor current will resonant between the boost inductor and MOSFET parasite capacitance. The resonant current can be big enough to distort the PFC current significantly. This application note introduces a digital control scheme based on UCD3XXX to predict the position at which the resonant current first time rises back from negative to zero a

Parts

Part Number Name Companion Part
UCD3020RGZR UCD3020RGZR Buy Datasheet
UCD3020RGZT UCD3020RGZT Buy Datasheet
UCD3028RHAR UCD3028RHAR Buy Datasheet
UCD3028RHAT UCD3028RHAT Buy Datasheet
UCD3028RMHR UCD3028RMHR Datasheet
UCD3028RMHT UCD3028RMHT Datasheet
UCD3040PFC UCD3040PFC Buy Datasheet
UCD3040PFCR UCD3040PFCR Buy Datasheet
UCD3040RGCR UCD3040RGCR Buy Datasheet
UCD3040RGCT UCD3040RGCT Buy Datasheet
UCD3138064ARGCR UCD3138064ARGCR Buy Datasheet
UCD3138064ARGCT UCD3138064ARGCT Buy Datasheet
UCD3138064RGCR UCD3138064RGCR Buy Datasheet
UCD3138064RGCT UCD3138064RGCT Buy Datasheet
UCD3138064RGZR UCD3138064RGZR Buy Datasheet
UCD3138064RGZT UCD3138064RGZT Buy Datasheet
UCD3138064RMHR UCD3138064RMHR Buy Datasheet
UCD3138064RMHT UCD3138064RMHT Buy Datasheet
UCD3138128PFC UCD3138128PFC Buy Datasheet
UCD3138128PFCR UCD3138128PFCR Buy Datasheet
UCD3138A64PFC UCD3138A64PFC Buy Datasheet
UCD3138A64PFCR UCD3138A64PFCR Buy Datasheet
UCD3138ARGCR UCD3138ARGCR Buy Datasheet
UCD3138ARGCT UCD3138ARGCT Buy Datasheet
UCD3138ARMHR UCD3138ARMHR Buy Datasheet
UCD3138ARMHT UCD3138ARMHT Buy Datasheet
UCD3138RGCR UCD3138RGCR Buy Datasheet
UCD3138RHAR UCD3138RHAR Buy Datasheet
UCD3138RMHR UCD3138RMHR Buy Datasheet
UCD3138RMHT UCD3138RMHT Buy Datasheet