Transformerless step-up converter with high voltage ratio

摘要

A half-bridge HB consisting of two series-connected active switches S2 and S3, a capacitor C1, two coils L1 and L2, is provided for achieving a large DC voltage ratio, consisting of an asymmetrical half-bridge AHB, formed by the first active switch S1 and the diode D1 , A positive El and a negative E2 input terminal to which the input voltage U1 is connected, a positive Al and a negative output terminal to which the load LAST or the parallel circuit of the load LAST and a second capacitor C2 is connected. The asymmetric half-bridge AHB and the half-bridge HB can be formed by integrated modules, the half-bridge (HB) being controlled by a half-bridge driver.