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.