The FSL4110LR is an integrated pulse width modulation (PWM) controller and 1000 V avalanche rugged SenseFET specifically designed for high input voltage offline Switching Mode Power Supplies (SMPS) with minimal external components. VCC can be supplied through integrated high−voltage power regulator without auxiliary bias winding. The integrated PWM controller includes a fixed−frequency oscillator, Under−Voltage Lockout (UVLO), Leading−Edge Blanking (LEB), optimized gate driver, soft−start, temperature−compensated precise current sources for loop−compensation, and variable protection circuitry. Compared with a discrete MOSFET and PWM controller solution, the FSL4110LR reduces total cost, component count, PCB size, and weight; while simultaneously increasing efficiency, productivity, and system reliability. This device provides a basic platform for cost−effective design of a flyback converter.
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