Interleaved Hybrid Boost Converter with Switched Capacitor Technique

The output from solar panels, batteries, and other miniature DC sources supply current at low voltages. In order to use this output for certain applications, voltage has to be boosted. This paper presents a high gain DC-DC converter with two-phase interleaved input to reduce input current ripple. A voltage lift capacitor is used to add the outputs of interleaved stages. The output of the interleaved stage is given to a hybrid switched capacitor block, consisting of two diodes and two capacitors. The advantage of the proposed topology is that a high gain is obtained with moderate duty cycle, reduced input current ripple, relatively lower switching stress and without using coupled circuits. The advantages of this converter topology makes it an attractive option for automobile applications and fuel cell based power systems, that are employed in smart grids. The results of the SPICE simulation of the proposed converter are presented to prove its validity.