Comparison of Inductor-Half-Bridge and Class-E resonant topologies for piezoelectric transformer applications

A comparison of Inductor-Half-Bridge (IHB) and Class-E (CLE) resonant converters using piezoelectric transformer (PT) is presented in this paper. The analysis approach is based on state space normalized solutions which allows precise analyzing and comparing the two topologies for different applications with mathematics software. The obtained mathematic results can be directly used to design and to optimize the converter parameters to meet the requirements of specific applications. Two demonstration boards for an offline 2 Watts LED application have been implemented with IHB and CLE resonant converters separately. The experiment results are in a good agreement with the theoretical calculations and conclusions.