J. S. Glaser and J. M. Rivas, “A 500 W push-pull dc-dc power converter with a 30 MHz switching frequency,

” IEEE Transactions on Power Electronics, vol. 23, no. 4, pp. 2012-2019, Jul. 2008.

This paper presents the design and implementation of a high-power push-pull dc-dc converter operating at a high switching frequency of 30 MHz. The converter is capable of delivering up to 500 W of power with high efficiency and low output voltage ripple. The push-pull topology offers several advantages such as reduced output voltage ripple, increased power density, and improved efficiency. However, high-frequency operation presents several challenges such as switching losses, EMI, and parasitic effects.

The authors propose a design methodology that takes into account the parasitic elements of the components and the layout of the circuit to minimize the impact of these effects on the converter performance. The transformer design is optimized to minimize leakage inductance and interwinding capacitance, which are critical factors affecting the converter efficiency and EMI. The authors also propose a novel gate drive scheme that reduces the switching losses and improves the converter efficiency.

The experimental results show that the proposed converter achieves a peak efficiency of 92% and a power density of 16.7 W/cm3, which is significantly higher than other high-frequency converters reported in the literature. The converter also exhibits low output voltage ripple and meets the EMI standards. The authors conclude that the proposed converter is suitable for high-power applications where high efficiency, low output voltage ripple, and high power density are required.