Design of Boost power factor corrector based on UC3854 Boost Controle de Tensão e Corrente

 ABSTRACT

 PFC (Power Factor Correction) is an effective method to reduce harmonic currents in power grids The control circuit and parameters design of the PFC circuit .

As shown in Fig.2, in Boost PFC circuit, the control core is internal multiplier of UC3854DW, through sampling input voltage Vin, input current Iin and output voltage Vo1, the PWM signal is generated to force the input average current to be in phase with the input voltage, so the power factor is close to 1

                 Figure 2. Boost PFC circuit controlled by UC3854

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