This paper proposes a LLC resonant and partial power processing integrated converter to realize the reduction of stress to the components in the second stage and the increase in the whole switching efficiency. Meanwhile, the first stage applies a interleaved structure to realize zero input current ripple. On one hand, the given topology solves the problem of reducing efficiency and difficulty in magnetic component design. On the other hand, it significantly reduces the stress of switching elements of the second stage, lowering the cost for the system. Through theory analysis and simulation, the validity of proposed structure is verified, and the effectiveness and practicability are illustrated through the experiment.

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