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25 - 27 February 2020 // Nuremberg, Germany

Conferences and supporting programme

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Presentations Exhibitor´s Forum

Power Supply Efficiency – An Inconvenient Truth Vortragssprache Englisch

Any embedded system needs a power supply, and conversion efficiency is its figure of merit. However, as often with important parameters, there is neither a uniform measurement method nor a uniform measurement setup. To make matters worse, the efficiency depends on external parameters like input voltage, load current and ambient temperature. And in their data sheets the power supply manufacturers indicate the efficiency differently or even are doing some specsmanship, which makes it impossible to directly compare the models from different manufacturers via their data sheets.

In 2015, the EPSMA (European Power Supplies Manufacturers' Association) published a guideline in which a consistent method for determining the efficiency was proposed. According to this method, we have measured the efficiency curves of 13 PCB-mounted DC/DC converter modules from different manufacturers at different operating points and compared the results with the figures in the data sheet. The findings are thrilling!

--- Date: 27.02.2019 Time: 11:00 - 11:30 Location: Exhibitor's Forum, Hall 3A, 3A-730



Ralf Higgelke



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