NCP1622: Power Factor Controller, Enhanced Light Load Efficiency

Description: The 6-pin PFC controller NCP1622 is designed to dr...
  • The 6-pin PFC controller NCP1622 is designed to drive PFC boost stages. It is based on an innovative Valley Synchronized Frequency Fold-back (VSFF) method. In this mode, the circuit classically operates in Critical conduction Mode (CrM) when control voltage exceeds a programmable value Vctrl,FF. When Vcontrol is below this preset level Vctrl,FF, the NCP1622 (versions [B**] and [D**]) linearly decays the frequency down to about 30 kHz until Vcontrol reaches the SKIP mode threshold. VSFF maximizes the efficiency at both nominal and light load. In particular, the stand-by losses are reduced to a minimum. Like in FCCrM controllers, internal circuitry allows near-unity power factor even when the switching frequency is reduced. Housed in a TSOP6 package, the circuit also incorporates the features necessary for robust and compact PFC stages, with few external components.
  • Features
  • Critical Conduction Mode with frequency foldback - Optimizes conversion efficiency across load range
  • Valley Synchronized Frequency Fold-back (VSFF) - Enhanced efficiency at light load conditions compared to CrM PFC
  • Works with or without a transformer w/ ZCD winding - Reduced inductor cost and simplified design
  • Dynamic Response Enhancer - Improved transient response for line and load steps
  • Applications
  • Offline Power Supply
  • End Products
  • Flat panel TV
  • High Power Adapters
  • PC Power Supplies
  • Lighting Ballasts
  • Flat Screen TV
  • All Off Line Appliances Requiring Power Factor correction
  • Technical Documentation & Design Resources
    Evaluation/Development Tool Information
    Availability and Samples
    NCP1622BCCSNT1G
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Power Factor Controller, Enhanced Light Load Efficiency, Power Factor Controller, Enhanced Light Load Efficiency
  • Package Type: TSOP-6
  • Package Case Outline: 318G-02
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 3000
  • Inventory

  • Market Leadtime (weeks):4 to 8
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  • ON Semiconductor:9,000
  • NCP1622BECSNT1G
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Power Factor Controller, Enhanced Light Load Efficiency, Power Factor Controller, Enhanced Light Load Efficiency
  • Package Type: TSOP-6
  • Package Case Outline: 318G-02
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 3000
  • Inventory

  • Market Leadtime (weeks):Contact Factory
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  • ON Semiconductor:18,000
  • NCP1622DCCSNT1G
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Power Factor Controller, Enhanced Light Load Efficiency, Power Factor Controller, Enhanced Light Load Efficiency
  • Package Type: TSOP-6
  • Package Case Outline: 318G-02
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 3000
  • Inventory

  • Market Leadtime (weeks):13 to 16
  • Arrow:0
  • Digikey:>1K
  • Mouser:>1K
  • Newark:>1K
  • ON Semiconductor:15,000
  • Specifications
  • PFC Mode:  
  • Frequency Operation:  
  • Control Mode:  
  • Topology:  
  • fSW Typ (kHz):  
  • VCC Max (V):  
  • Drive Cap. (mA):  
  • UVLO (V):  
  • Latch:  
  • UVP:  
  • Inhibition:  
  • Package Type: TSOP-6 
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