FSQ0565RQWDTU

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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