FSQ0265

FSQ0365/0265/0165/321 — Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter August 2011 FSQ0365, FSQ0265, FSQ0165, FSQ321 Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter – Low EMI and High Efficiency Features  Optimized for Valley Switching Converter (VSC)  Low EMI through Variable Frequency Control and Inherent Frequency Modulation  High Efficiency through Minimum Voltage Switching  Narrow Frequency Variation Range Over Wide Load and Input Voltage Variation  Advanced Burst-Mode Operation for Low Standby Power Consumption  Pulse-by-Pulse Current Limit  Protection Functions: Overload Protection (OLP), Over-Voltage Protection (OVP), Abnormal OverCurrent Protection (AOCP), Internal Thermal Shutdown (TSD)  Under-Voltage Lockout (UVLO) with Hysteresis  Internal Startup Circuit  Internal High-Voltage SenseFET: 650V  Built-in Soft-Start: 15ms Applications  Power Supplies for DVP Player, DVD Recorder, Set-Top Box  Adapter  Auxiliary Power Supply for PC, LCD TV, and PDP TV Description A Valley Switching Converter generally shows lower EMI and higher power conversion efficiency than a conventional hard-switched converter with a fixed switching frequency. The FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for valley switching operation with minimal external components. The PWM controller includes an integrated fixed-frequency oscillator, under-voltage lockout, Leading-Ed...