onsemi PMIC - PMIC - PFC (Power Factor Correction) - NCP1654BD133R2G NCP1654BD133R2G

The NCP1654BD133R2G is a Power Factor Correction (PFC) controller designed for Continuous Conduction Mode (CCM) step-up pre-converters. It operates in a fixed frequency mode and adjusts the power switch conduction time based on the instantaneous coil current. This device is housed in a compact SO8 package, which minimizes the number of external components required for implementation, thereby simplifying the design process. Key features include compliance with IEC61000,àí3,àí2 standards, a fast transient response, very low startup currents (less than 75 ¬µA), and low shutdown currents (less than 400 ¬µA). The controller integrates several safety features such as overvoltage protection, undervoltage detection, brown-out detection, and accurate overcurrent limitation. It also includes a soft-start function for smooth startup operation and a latching PWM for cycle-by-cycle duty-cycle control. The NCP1654BD133R2G is suitable for applications in flat TVs, PC desktops, AC adapters, and other offline switch-mode power supplies (SMPS). Its operating junction temperature range is from -40¬8C to +125¬8C, making it versatile for various environmental conditions. The device is also Pb-free, aligning with modern environmental standards.