Analyzing and mitigating parasitic capacitances in planar transformers for high‑frequency operation

Sujeong Lee; Seokwon Kim; Jongwon Shin; Wonhee Kim

Analyzing and mitigating parasitic capacitances in planar transformers for high‑frequency operation

Vol. 24, No. 6, pp. 946-954, Jun. 2024

10.1007/s43236-024-00804-6

Multi-layer PCB

Planar transformer

High frequency

Parasitic capacitance

Resonance

Impedance analysis

Abstract

Planar magnetic components are compact and less susceptible to skin effect due to their thin copper layers. However, the increase in parasitic capacitance has been a challenge in high-frequency operation of planar transformers (PTs). Parasiticcapacitances resonate with inductance and may damage switch devices. Thicker printed circuit board (PCB) and reconfigured windings are suggested in this paper to mitigate the parasitic capacitances. A detailed analysis of the parasitic capacitances is performed with a prototype PT. The resonant frequency increased from 1.27 to 1.63 MHz with a 0.4 mm thicker PCB. The reconfigured PT was 1.38 MHz, 0.3 MHz higher than the original PT.

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Cite this article

[IEEE Style]

S. Lee, S. Kim, J. Shin, W. Kim, "Analyzing and mitigating parasitic capacitances in planar transformers for high‑frequency operation," Journal of Power Electronics, vol. 24, no. 6, pp. 946-954, 2024. DOI: 10.1007/s43236-024-00804-6.

[ACM Style]

Sujeong Lee, Seokwon Kim, Jongwon Shin, and Wonhee Kim. 2024. Analyzing and mitigating parasitic capacitances in planar transformers for high‑frequency operation. Journal of Power Electronics, 24, 6, (2024), 946-954. DOI: 10.1007/s43236-024-00804-6.