FAN4800AS: Power Factor Controller (PFC) CCM + PWM Controller, with Surge Capability Enhancement

Description: The highly integrated FAN4800AS/CS/01S/02S parts a...
  • The highly integrated FAN4800AS/CS/01S/02S parts are specially designed for power supplies that consist of boost PFC and PWM. They require very few external components to achieve versatile protections / compensation. They are available in 16-pin DIP and SOP packages.
    The PWM can be used in either current or voltage mode. In voltage mode, feed-forward from the PFC output bus can reduce the secondary output ripple.
    Compared with older productions, ML4800 and FAN4800, FAN4800AS/CS/01S/02S have lower operation current that saves power consumption in external devices. FAN4800AS/CS/01S/02S have accurate 49.9% maximum duty of PWM that makes the hold-up time longer. Brownout protection and PFC soft-start functions available in this series are not available in ML4800 and FAN4800.

    To evaluate FAN4800AS/CS/01S/02S for replacing existing FAN4800 and ML4800 boards, five things must be completed before the fine-tuning procedure:
    1. Change RAC resister from the old value to a higher resister: between 6 MΩ to 8 MΩ.
    2. Change RT/CT pin from the existing values to RT=6.8 kΩ and CT=1000 pF to have fPFC=64 kHz and fPWM=64 kHz.
    3. The VRMS pin needs to be 1.224 V at VIN=85 VAC for universal input application from line input from 85 VAC to 270 VAC.
    4. At full load, the average VVEA needs to be ~4.5 V and the ripple of VVEA needs to be less than 400 mV.
    5. For the Soft-Start pin, the soft-start current has been reduced to half the FAN4800 capacitor.

    There are two differences from FAN4800A/C/01/02 to FAN4800AS/CS/01S/02S:
    1. Under-voltage protection debounce time is extended to one second.
    2. PWM gate clamp voltage is raised to 19 V.
  • Features
  • Pin-to-Pin Compatible with ML4800 and FAN4800 and CM6800 and CM6800A
  • PWM Configurable for Current Mode or Feedforward Voltage-Mode Operation
  • Internally Synchronized Leading-Edge PFC and Trailing-Edge PWM in One IC
  • Low Operating Current
  • Innovative Switching-Charge Multiplier Divider
  • Average-Current Mode for Input-Current Shaping
  • PFC Over-Voltage and Under-Voltage Protections
  • PFC Feedback Open-Loop Protection
  • Cycle-by-Cycle Current Limiting for PFC/PWM
  • Power-on Sequence Control and Soft-Start
  • Brownout Protection
  • Interleaved PFC/PWM Switching
  • Improved Efficiency at Light Load
  • fRTCT=4xfPFC=4xfPWM for FAN4800AS/01S
  • fRTCT=4xfPFC=2xfPWM for FAN4800CS/02S
  • Applications
  • Desktop PC
  • LCD TV
  • LCD Monitor
  • Distribution
  • Technical Documentation & Design Resources
    Availability and Samples
    FAN4800ASMY
  • Status: Last Shipments
  • Compliance: Pb-free Halide free 
  • Description: Power Factor Controller (PFC) CCM + PWM Controller, with Surge Capability Enhancement
  • Package Type: SOIC-16
  • Package Case Outline: 751BG
  • MSL: 3
  • Container Type: REEL
  • Container Qty: 2500
  • FAN4800ASMY-F116
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Power Factor Controller (PFC) CCM + PWM Controller, with Surge Capability Enhancement
  • Package Type: SOIC-16
  • Package Case Outline: 751BG
  • MSL: 3
  • Container Type: REEL
  • Container Qty: 2500
  • Inventory

  • Market Leadtime (weeks):2 to 4
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  • ON Semiconductor:27,500
  • FAN4800ASNY
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Power Factor Controller (PFC) CCM + PWM Controller, with Surge Capability Enhancement
  • Package Type: PDIP-16
  • Package Case Outline: 648-08
  • MSL: NA
  • Container Type: TUBE
  • Container Qty: 1500
  • Specifications
  • PFC Mode: CCM 
  • Frequency Operation: Fixed 
  • Control Mode: Current Mode 
  • Topology: Step-Up 
  • fSW Typ (kHz): 64 
  • VCC Max (V): 30 
  • Drive Cap. (mA): 470 / 550 
  • UVLO (V): 11 
  • Latch: No 
  • UVP: Yes 
  • Inhibition: No 
  • Package Type: SOIC-16  PDIP-16 
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