The UCC3818 is an 8-pin Power Factor Correction (PFC) IC developed by Texas Instruments. It is designed for use in high-efficiency AC-to-DC converters to improve power factor and reduce harmonic distortion. Below are the key details about the IC: Key Features: Power Factor Correction (PFC): Ensures near-unity power factor in power supplies. Reduces harmonic distortion, making it suitable for meeting IEC 61000-3-2 compliance. Continuous Conduction Mode (CCM): Operates in CCM for better performance in medium-to-high power applications. Fixed Switching Frequency: Supports fixed switching frequency operation, simplifying design. High Efficiency: Designed for low total harmonic distortion (THD) and improved power efficiency. Soft Start: Features soft-start functionality to minimize inrush currents during startup. Overvoltage and Overcurrent Protection: Protects the system against voltage and current surges. Wide Temperature Range: Operates over an extended temperature range suitable for industrial environments. Applications: Power Supplies for Servers and Workstations High-Power Lighting Systems Industrial and Consumer Electronics Telecommunication Systems Package Information: The UCC3818 is typically available in an SOIC-8 (Small Outline Integrated Circuit) SMD package, ensuring ease of integration into PCB designs. If you need the datasheet, design guidelines, or additional technical support, let me know!