onsemi AC DC Converters, Offline Switches FSL126MRTWDTU

The FSL126MRT is an integrated Pulse Width Modulation (PWM) controller and SenseFET designed for offline Switch-Mode Power Supplies (SMPS). It features a rugged 650V internal SenseFET and operates with advanced soft burst-mode technology, which minimizes standby power consumption and reduces audible noise. The device includes various protection functions such as Overload Protection (OLP), Over-Voltage Protection (OVP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD) with hysteresis, and Under-Voltage Lockout (UVLO) with hysteresis. With a low operating current of 0.4mA in burst mode and an internal startup circuit, the FSL126MRT is optimized for efficiency and reliability. It supports a wide input voltage range of 85-265V AC and is suitable for applications in power supplies for home appliances and DVD players. The device is packaged in a TO-220F format and is designed to reduce component count, size, and weight compared to discrete solutions, while enhancing overall system performance.