Q0765R – FSQ0765R

Part Number : Q0765R

Function : FSQ0765R

Manufactures : Fairchild Semiconductor

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Description :

FSQ0565R, FSQ0765R — Green-Mode Farichild Power Switch (FPS™) for Quasi-Resonant Operation June 2008 FSQ0565R, FSQ0765R Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation – Low EMI and High Efficiency Features „ Optimized for Quasi-Resonant Converter (QRC) „ Low EMI through Variable Frequency Control and AVS 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), LeadingEdge Blanking (LEB), optimized gate driver, internal softstart, 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. (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 Start-up 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 Resourses 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 AN-4148: Audible Noise Reduction Techniques for Fairchild Power Switch Fairchild Power Switch(FPS™) Applications AN-4150: Design Guidelines for Flyback Converters Using FSQ-Series Fairchild Power Switch (FPS™) © 2008 Fairchild Semiconductor Corporation FSQ0565R, FSQ0765R Rev. 1.0.1 www.fairchilds […]

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Q0765R Datasheet


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