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This literature is subject to all applicable copyright laws and is not for resale in any manner.FSQ0465RS/RB Green-Mode Farichild Power Switch (FPS) for Quasi-Resonant Operation December 2009 FSQ0465RS/RB Green-Mode Fairchild Power Switch (FPS) for Quasi-Resonant Operation - Low EMI and High Efficiency Features Description Optimized for Quasi-Resonant Converters (QRC) A Quasi-Resonant Converter (QRC) generally shows lower EMI and higher power conversion efficiency than a Low EMI through Variable Frequency Control and AVS (Alternating Valley Switching) conventional hard-switched converter with a fixed switching frequency. The FSQ-series is an integrated High-Efficiency through Minimum Voltage Switching Pulse-Width Modulation (PWM) controller and Narrow Frequency Variation Range over Wide Load SenseFET specifically designed for quasi-resonant and Input Voltage Variation operation and Alternating Valley Switching (AVS). The Advanced Burst-Mode Operation for Low Standby PWM controller includes an integrated fixed-frequency Power Consumption oscillator, Under-Voltage Lockout (UVLO), Leading- Simple Scheme for Sync Voltage Detection Edge Blanking (LEB), optimized gate driver, internal soft- Pulse-by-Pulse Current Limit start, temperature-compensated precise current sources Various Protection Functions: Overload Protection for a loop compensation, and self-protection circuitry. (OLP), Over-Voltage Protection (OVP), Abnormal Compared with a discrete MOSFET and PWM controller Over-Current Protection (AOCP), Internal Thermal solution, the FSQ-series can reduce total cost, Shutdown (TSD) with Hysteresis, Output Short Protection (OSP) component count, size, and weight while simultaneously increasing efficiency, productivity, and system reliability. Under-Voltage Lockout (UVLO) with Hysteresis This device provides a basic platform for cost-effective Internal Startup Circuit designs of quasi-resonant switching flyback converters. Internal High-Voltage Sense FET (650V) Built-in Soft-Start (17.5ms) Applications Power Supply for LCD TV and Monitor, VCR, SVR, STB, and DVD & DVD Recorder Adapter Related Resources Visit: