HomedatasheetQ0465R

Q0465R Datasheet

Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation - Low EMI and High Efficiency
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Description

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), 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

Features

Parameters


Manufacturer information

FAIRCHILD SEMICONDUCTOR

Fairchild has a rich history as a pioneer in the semiconductor industry and that pioneering spirit endures today. In an era where diversity can dilute focus and hamper innovation, we specialize in the development and manufacturing of a complete portfolio of low- to high-power solutions for the mobile, industrial, cloud, automotive, lighting, and computing industries. Fairchild is one of the most reliable partners in the industry, offering the shortest time from concept to silicon, expert FAEs for customer support, and a flexible, multi-source supply chain. Our vision is clear – anticipate the power efficiencies demanded by tomorrow’s electronic products and deliver an amazing design experience

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