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FSQ0465RS: 650V Integrated Power Switch with Quasi-Resonant Operation for 48Watt offline flyback converters

Datasheet: FSQ0465RS-D.pdf
Rev. A (2861kB)
Product Overview
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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.
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
  • LCD TV
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
FSQ0465RSLDTU Obsolete
Pb-free
Halide free
FSQ0465RS TO-220-6 340BN NA Tube 400  
FSQ0465RSWDTU Active
Pb-free
Halide free
FSQ0465RS TO-220-6 340BG NA Tube 400 $0.8661
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 8,000
Avnet   (2020-08-19 00:00) : <1K
Case Outlines
340BG    340BN   
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