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In this paper, an on-chip planar spiral stacked transformer for an integrated DC/DC converter Flyback is developed. The performance of a transformer is highly dependent on the geometry, electrical parameters, and thermal properties. At results, we obtained an efficiency of 81% at 350 MHz operating frequency. Then, a magnetic model simulation is carried out to study effects between the windings and substrate. 3D methods are used to study the electric field and magnetic field distribution in the transformer. A thermal simulation will be described to study effects of the substrate. The heat source is expressed from the losses. Heat dissipation depends on the geometric shape of the transformer. The temperature will be obtained by solving the heat equation, the conventional equations of conduction and convection.

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On-Chip Integrated Planar Spiral Stacked Transformer in Ferrite-Based Technology

  • 章节

  • 发表日期：

    2026年

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  • Yamina Benhadda,
  • Mokhtaria Derkaoui,
  • Kheira Mendaz,
  • Hayet Kharbouch

摘要

In this paper, an on-chip planar spiral stacked transformer for an integrated DC/DC converter Flyback is developed. The performance of a transformer is highly dependent on the geometry, electrical parameters, and thermal properties. At results, we obtained an efficiency of 81% at 350 MHz operating frequency. Then, a magnetic model simulation is carried out to study effects between the windings and substrate. 3D methods are used to study the electric field and magnetic field distribution in the transformer. A thermal simulation will be described to study effects of the substrate. The heat source is expressed from the losses. Heat dissipation depends on the geometric shape of the transformer. The temperature will be obtained by solving the heat equation, the conventional equations of conduction and convection.