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Laptop power adaptor hits 94% efficiency, squeezes into 3.19 in.3 space

June 6, 2017 By Lee Teschler 1 Comment

A reference design for a tiny, 65-W, 94% efficient ac/dc power adaptor for laptops measures just 3.19 in.3 and has a power density of 20 W/in3. This high efficiency means that the device runs cooler than standard ac/dc adapters.

rompowerAt the core of this adapter is a synchronous rectifier circuit using 150-V, 7-mΩ EPC2033 eGaN FETs from Efficient Power Conversion Corporation (EPC). In this power conversion application, the eGaN FETs provide an 80% reduction in the driving power, a 25% reduction in on resistance, and 5% less power dissipation compared to devices based on silicon technology.

The reference design was developed by Rompower Energy Systems in Tucson, Ariz.

Filed Under: AC-DC, Converters Tagged With: epc

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  1. Press releases for AC/DC reference design – RomPower Inc says:
    June 8, 2017 at 2:41 pm

    […] Laptop power adaptor hits 94% efficiency, squeezes into 3.19 in.3 space […]

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