FSQ510

www.DataSheet4U.com PRELIMINARY DATASHEET FSQ510, FSQ510H Green Mode Fairchild Power Switch (FPSTM) for Quasi-Resonant Converter August 2006 FSQ510, FSQ510H — Green Mode Fairchild Power Switch (FPSTM) for Quasi-Resonant Converter – Low EMI and High Efficiency Features ƒ Uses a DMOS Integrated Power Switch ƒ Optimized for Quasi-Resonant Converter (QRC) ƒ Low EMI through Variable Frequency Control and Inherent Frequency Modulation Applications ƒ Cell Phone Chargers ƒ Auxiliary Power Supplies for PC and White Goods Description A Quasi-Resonant Converter (QRC) generally shows lower EMI and higher power conversion efficiency than a conventional hard-switched converter with a fixed switching frequency. The FSQ510(H) is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for quasi-resonant offline Switch Mode Power Supplies (SMPS) with minimal external components. The PWM controller includes an integrated fixed-frequency oscillator, Under-Voltage Lockout (UVLO), Leading Edge Blanking (LEB), optimized gate driver, internal soft start, temperaturecompensated precise current sources for loop compensation, and self-protection circuitry. Compared with discrete MOSFET and PWM controller solution, the FSQ510(H) can reduce total cost, component count, size and weight; while simultaneously increasing efficiency, productivity, and system reliability. This device provides a basic platform that is well suited for cost-effective designs of quasi-resonant...