An EV charger is basically a power converter that conventionally consists of different stages. Firstly, because the battery requires DC power for charging, an AC-DC conversion stage is added. However, because AC-DC rectifiers are inefficient and draw distorted current from the grid, a PFC correction stage is added. Lastly, a DC-DC conversion stage is added to regulate the output voltage to the battery’s voltage level. The block diagram below illustrates in detail the types and categories of each stage.

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