Design and Implementation of an Isolated Push-Pull DC-DC Converter using Parallel Transformer Configuration

This paper presents a parallel isolated push-pull DCDC converter capable of delivering a significantly boosted output current. The topology consists of two parallel push-pull converters with center-tapped transformers on both primary and secondary sides, operating at a switching frequency of 33 kHz to minimize component size. The converter employs four MOSFETs, with each pair operating in complementary mode. The proposed design is validated through both simulation and experimental implementation, providing a clear comparison of performance characteristics. Experimental results demonstrate an output current of 14.67 A, which is more than three times higher than the input current, with an efficiency of approximately$\mathbf{7 5. 1 \%}$at a$\mathbf{5 0 \%}$duty cycle. Furthermore, each stage shares half of the total output current, confirming the scalability of the topology. Additional parallel stages can be incorporated to further increase current capability, making this approach suitable for applications such as battery charging and other high-power conversion systems requiring high current outputs.