Wide Input Range 60W Utility Power Supply

Due to the time these articles were written, devices used in these solutions do not always represent the latest UnitedSiC SiC FETs.
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Wide Input Range 60W Utility Power Supply

The wide input range of the Utility Power Supply is designed to operate off of high voltage rails (400VDC and 800VDC) that can handle the broadest range of input voltage tolerances (200VDC to 1000VDC). A JFET cascode configuration (UJN171K: 1.7k, 800mΩ) as the power switch provides high efficiency, but also simplifies the startup circuit.

Efficiency vs. Input Voltage

Efficiency of the converter at 35W and 55W across the entire input range (200 to 1000 Volts).