DC-DC Converter for USB-C Power Adapter in Residential DC Electricity

This paper presents the design and development of a USB-C Power Adapter for residential DC electrical system. Although USB-C is a new and emerging technology, it is well placed to become a standard for DC power delivery. The power adapter utilizes a USB Power Delivery controller to operate a two-phase synchronous buck converter to interface with an existing 48V DC House infrastructure to provide output voltages of 5, 9, 15, or 20 VDC at up to 100W. Hardware design and construction of the converter were conducted and then tested. Results from the hardware test show that the USB-C power adapter was able to achieve the desired output voltages while delivering up to 100W. At full load, the power adapter was measured at 96.27% efficiency, less than 1% output voltage ripple, and less than 2% on line and load regulations. Additionally, when connecting actual consumer devices to the system, they were charged without issue and at the proper power delivery profile.