Interleaved parallel BOOST high-gain converter with low voltage stress

The invention provides an interleaving parallel BOOST high-gain converter with low voltage stress, and provides a novel interleaving parallel single-input high-voltage-rise DC/DC converter topology by combining a switched capacitor and a three-level circuit on the basis of a traditional interleaving parallel boost converter. Firstly, the input of the converter adopts an interleaved boost circuit, and the topological structure is simple and symmetrical, so that the current distribution between two phases is uniform, and the current stress and the input filter are smaller; in addition, the output end adopts a switched capacitor voltage-multiplying unit to be combined with a three-level circuit, so that the output voltage gain is further improved, and the voltage stress is reduced. The switched capacitors are charged in parallel and then discharged. While voltage gain is increased, a switching device in the converter is prevented from being in an extreme duty ratio state for a long time, ripples of input current