Considering the conclusion of ripple analysis, it can be seen that the maximum current ripple that can be achieved when the three phases are staggered is 1/3 of the maximum ripple of each phase. Therefore, the maximum current ripple of each phase is12A。 According to the working principle of Buck circuit, when the peak-to-peak value of inductor current is twice the average value of inductor current, the buck circuit is in a critical working state, i.e.Inductive current is at the boundary between continuity and discontinuity