onsemi PFC (Power Factor Correction) FAN7529MX-FS

The FAN7529MX-FS is a critical conduction mode (CRM) power factor correction (PFC) controller designed for boost applications. It operates using voltage mode PWM, which eliminates the need for rectified AC line voltage sensing, thereby reducing power loss compared to current-mode controllers. The device features low total harmonic distortion (THD), adjustable output over-voltage protection, and multiple safety mechanisms including open-feedback protection, over-current protection, and under-voltage lockout with a 3.5V hysteresis. The FAN7529MX-FS has a low start-up current of 40µA and an operating current of 1.5mA, making it efficient for various applications such as adapters, ballasts, LCD TVs, CRT TVs, and switch-mode power supplies (SMPS). It is available in an 8-pin SOP package and supports a peak gate drive current of +500/-800mA. The device can be disabled when the INV pin voltage is below 0.45V, reducing its operating current to 65µA. This combination of features makes the FAN7529MX-FS suitable for engineers looking for an efficient and reliable PFC solution.