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Industry Sessions

IS15.5 - Hybrid-Flyback: A novel power topology for ultra-flat SMPS designs

Wednesday, March 19, 2025
3:40 PM – 4:05 PM ET
Location: Level Four, A410
Presentation Description: Display based devices such as TVs, all-in-one PCs, etc., follow a development path towards slimmer designs. In some of those applications the power supply remains integrated and it presents the major challenge to further achieve thinner devices. In other cases, and due to such limitation, the power supply is provided separately.
Managing efficiency and thermals with limited magnetic components size and/or low number of them, is one of the key enablers.
If power factor needs to be provided, a PFC boost followed by a DC-DC stage is typically used. As DC-DC stage an LLC converter is the most common solution up to now. But reaching ultra-flat designs pushes the magnetics from a traditional wire winding to PCB based winding.
LLC based converters requiring a minimum series inductance, tight input voltage and especially center tape secondary winding bring high limitations to overcome.
In this presentation a novel converter, hybrid flyback, addressing the new challenges for ultra-flat design will be proposed and the advantages compared to existing state of the art solutions will be presented.