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FSQ0465RU Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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FSQ0465RU Datasheet(HTML) 1 Page - Fairchild Semiconductor |
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1 / 22 page  © 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSQ0465RU Rev. 1.0.0 May 2009 FSQ0465RU Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation - Low EMI and High Efficiency Features ! Optimized for Quasi-Resonant Converters (QRC) ! Low EMI through Variable Frequency Control and AVS (Alternating Valley Switching) ! 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 ! Simple Scheme for Sync-Voltage Detection ! Pulse-by-Pulse Current Limit ! Various Protection Functions: Overload Protection (OLP), Over-Voltage Protection (OVP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD) with Hysteresis, Output Short Protection (OSP) ! Under-Voltage Lockout (UVLO) with Hysteresis ! Internal Startup Circuit ! 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: http://www.fairchildsemi.com/apnotes/ for: ! AN-4134: Design Guidelines for Offline Forward Converters Using Fairchild Power Switch (FPS™) ! AN-4137: Design Guidelines for Offline Flyback Converters Using Fairchild Power Switch (FPS™) ! AN-4140: Transformer Design Consideration for Offline Flyback Converters Using Fairchild Power Switch (FPS™) ! AN-4141: Troubleshooting and Design Tips for Fairchild Power Switch (FPS™) Flyback Applications ! AN-4145: Electromagnetic Compatibility for Power Converters ! AN-4147: Design Guidelines for RCD Snubber of Flyback Converters ! AN-4148: Audible Noise Reduction Techniques for Fairchild Power Switch (FPS™) Applications ! AN-4150: Design Guidelines for Flyback Converters Using FSQ-Series Fairchild Power Switch (FPS™) 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 FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for quasi-resonant operation and Alternating Valley Switching (AVS). The PWM controller includes an integrated fixed-frequency oscillator, Under-Voltage Lockout (UVLO), Leading- Edge Blanking (LEB), optimized gate driver, internal soft- start, temperature-compensated precise current sources for a loop compensation, and self-protection circuitry. Compared with a discrete MOSFET and PWM controller solution, the FSQ-series can reduce total cost, component count, size, and weight; while simultaneously increasing efficiency, productivity, and system reliability. This device provides a basic platform for cost-effective designs of quasi-resonant switching flyback converters. |
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