FSQ0565RQLDTU
数据手册.pdf绿色模式飞兆功率开关( FPS )的准谐振操作 - 低EMI和高效率 Green-Mode Fairchild Power Switch FPS for Quasi-Resonant Operation - Low EMI and High Efficiency
Green-Mode Power Switch FPS™ for Quasi-Resonant Operation- Low EMI and High Efficiency
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.
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, 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