Improved Quadratic Boost High-Gain DC-DC Converter Based on Constant Off-Time Control Mode

Abstract

A non-isolated modified quadratic boost high-gain DC-DC converter is proposed to overcome the problems of limited boost capability and high switching stress in quadratic boost converters. The proposed converter has two topologies. The operating principles of the two topologies are analyzed, and the voltage gain and switching stress of the circuit topologies are theoretically derived and compared with existing converters. The proposed converter increases the output gain while reducing switching stress and improving conversion efficiency. A simulation model is built in MATLAB/Simulink, and the simulation results verify the correctness of the theoretical calculations. A prototype was built, and the feasibility of the converter design was verified by comparing the theoretical derivation and the prototype test results.