MC33368: Power Factor Controller (PFC), High Voltage

Description: The MC33368 is an active power factor correction c...
  • The MC33368 is an active power factor correction controller that functions as a boost preconverter in off-line power supply applications. MC33368 is optimized for low power, high density power supplies requiring a minimum board area, reduced component count and low power dissipation. The narrow body SOIC package provides a small footprint. Integration of the high voltage startup saves approximately 0.7 W of power compared to resistor bootstrapped circuits.

    The MC33368 features a watchdog timer to initiate output switching, a one quadrant multiplier to force the line current to follow the instantaneous line voltage a zero current detector to ensure critical conduction operation, a transconductance error amplifier, a current sensing comparator, a 5.0 V reference, an undervoltage lockout (UVLO) circuit which monitors the VCC supply voltage and a CMOS driver for driving MOSFETs. The MC33368 also includes a programmable output switching frequency clamp. Protection features include an output overvoltage comparator to minimize overshoot, a restart delay timer and cycle-by-cycle current limiting.
  • Features
  • Lossless Off-Line Startup
  • Output Overvoltage Comparator
  • Leading Edge Blanking (LEB) for Noise Immunity
  • Watchdog Timer to Initiate Switching
  • Restart Delay Timer
  • Applications
  • Active Power Factor Control
  • End Products
  • Off-Line Power Supplies
  • Technical Documentation & Design Resources
    Product Change Notification
    Availability and Samples
    MC33368DG
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Power Factor Controller (PFC), High Voltage
  • Package Type: SOIC-16
  • Package Case Outline: 751K-01
  • MSL: 1
  • Container Type: TUBE
  • Container Qty: 48
  • Inventory

  • Market Leadtime (weeks):2 to 4
  • Arrow:0
  • Mouser:>1K
  • Newark:<1K
  • PandS:<100
  • MC33368DR2G
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Power Factor Controller (PFC), High Voltage
  • Package Type: SOIC-16
  • Package Case Outline: 751K-01
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 2500
  • Inventory

  • Market Leadtime (weeks):4 to 8
  • Arrow:0
  • Digikey:<1K
  • Mouser:<1K
  • Packages
    Specifications
  • PFC Mode: CRM 
  • Frequency Operation: Variable 
  • Control Mode: Current Mode 
  • Topology: Step-Up 
  • fSW Typ (kHz): Variable 
  • VCC Max (V): 16 
  • Drive Cap. (mA): 1000 / 1000 
  • UVLO (V): 8.5 - 13 
  • Latch: Yes 
  • UVP: No 
  • Inhibition: Yes 
  • Package Type: SOIC-16 
  • ON Semiconductor Full Web Site