Power switch driving techniques in single-phase dual-parallel interleaved boost PFC

摘要

Three driving techniques are analyzed in single-phase dual-parallel interleaved boost PFC (DPIB-PFC) control circuit, which are synchronized driving, phase-shifted driving and frequency-divided driving. And two kinds of boost inductors are also discussed, which are separated inductor and coupled inductor. Many simulations and experiments are also carried out based on different driving techniques and boost inductors, when dedicated controller L4981A/L4981B, pulse width modulator SG3525A and a logic circuit are employed respectively. It proves by results that the three driving techniques are feasible in principle, especially phase-shifted driving, because they can bring about not only better PFC effects but also low cost.