Based on the EG1654A chip's continuous mode APFC solution, with an input voltage of AC 85V - 265V, achieves stable voltage output of DC 380V and rated power of 600W through dual closed-loop control, featuring low THD, high PF (up to 0.998), and high efficiency (minimum 91.5%). It provides detailed explanations of the main component parameter selection and calculation methods, as well as typical waveforms, PCB design, and component lists.