The USB-C Portable Power Bank is a capstone project focused on designing a safe, testable, battery-powered USB-C charging system. The project combines a 1-cell lithium-ion battery, USB-C input charging, regulated 5 V output power, MCU supervision, and output fault protection into one portable prototype. The goal is to manage more than simple voltage conversion: the system must charge the battery safely, provide steady USB-C output power, and respond predictably to fault conditions. The poster presents the system architecture, design objectives, preliminary test results, and planned hardware improvements. Early testing confirmed USB-C input detection, charging-state entry, UART fault-state entry and recovery, and low-load output operation at 5.077 V and 212 mA. Final validation focuses on the 4.75-5.25 V input range, controlled battery charging, ripple, 1.5 A output target, and 1.65 to 2.0 A protection response. The project demonstrates how power electronics, embedded control, PCB design, and hardware validation work together in a practical energy-management system.
