FSQ0465RS

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SMPS Power switch(QRC), 4A, 650V, TO220F (Green)

General 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 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.

Product Status/Pricing/Packing

Product Product Status Eco Status *Pricing Package Type Leads Packing Method Package Drawing **Package Marking Convention RoHS IPC1752 RoHS/REACH/JIG Certificate of Compliance
FSQ0465RSLDTU Full Production Green as of Jul 2011 $1.43 TO220F 6-LEAD 6 RAIL PDF Line 1:$Y (Fairchild logo)
&Z (Asm. Plant Code)
&3 (3-Digit Date Code)
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FSQ0465RSWDTU Full Production Green as of Jul 2011 $1.41 TO220F 6-LEAD 6 RAIL PDF Line 1:$Y (Fairchild logo)
&Z (Asm. Plant Code)
&3 (3-Digit Date Code)
&K
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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

  • TBA

Application Notes

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