onsemi Integrated Circuits (ICs) - PMIC - AC DC Converters, Offline Switchers FSL4110LRN

The FSL4110LRN is an integrated pulse width modulation (PWM) controller combined with a 1000 V avalanche rugged SenseFET, designed for high input voltage offline Switching Mode Power Supplies (SMPS). It operates at a fixed frequency of 50 kHz and can be powered through an integrated high-voltage regulator, eliminating the need for an auxiliary bias winding. This device features a range of protection functions including Under-Voltage Lockout (UVLO), Over-Voltage Protection (OVP), and Internal Thermal Shutdown (TSD) with hysteresis. It also incorporates soft-start functionality and pulse-by-pulse current limiting to enhance system reliability. The FSL4110LRN is suitable for applications such as electric metering and auxiliary power supplies for industrial systems. Engineers may find this product advantageous due to its reduced component count, smaller PCB size, and improved efficiency compared to discrete solutions. The device is available in a PDIP-7 package and is Pb-free.