Generating USB Type-C (also called USB-C) charging power for multiple peripherals requires a flexible dc-dc converter that can work with a controller to deliver the desired voltage and current capability to the corresponding device. As power density increases—particularly in multiple-power port or hub applications—efficiency becomes paramount and requires the lowest power loss to minimize internal heat. The programmable power supply (PPS) specification for USB power sourcing adds even more functionality for the power-conversion device to integrate.
This article will focus on how to implement a complete USB-C power-delivery (PD) solution with flexible functionality. The system must meet the demands of the current and voltage regulations listed in the PPS specifications, while still enabling fully functional USB Type-C products. It will cover the major aspects of design, including component selection, board layout, and functional optimization utilizing programmable features and settings.