Boost converter with high voltage gain using a switched capacitor circuit

An integrated boost switched-capacitor (SC) converter able to step-up the line by ten times is presented. It is formed by a SC-circuit containing three capacitors and a boost stage. The two power stages are not connected in cascade, but they are integrated for achieving an overall high efficiency. The SC-circuit allows for a steep voltage ratio; for efficiency's purpose, it is not regulated. The boost stage gives the line and load regulation, using a classical PWM control. The theoretical results based on an energy-balance approach and simulation using the exact cyclical differential equations of the converter are confirmed by the experimental results on a prototype of 35 W power.

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