FAN4800I

Power Factor Correction (PFC) and PWM Controller Combo

Obsolete as of 12-Mar-2013

    The FAN4800 is a controller for power-factor-corrected, switched-mode power supplies. Power Factor Correction (PFC) allows the use of smaller, lower-cost bulk capacitors, reduces power line loading and stress on the switching FETs, and results in a power supply that fully complies with IEC-1000-3-2 specifications. Intended as a BiCMOS version of the industry-standard ML4800, the FAN4800 includes circuits for the implementation of leading edge, average current, boost-type power factor correction and a trailing-edge Pulse Width Modulator (PWM). A gate driver with 1A capabilities minimizes the need for external driver circuits. Low-power requirements improve efficiency and reduce component costs.     An over-voltage comparator shuts down the PFC section in the event of a sudden decrease in load. The PFC section also includes peak-current limiting and input voltage brownout protection. The PWM section can be operated in current or voltage mode, at up to 250kHz, and includes an accurate 50% duty cycle limit to prevent transformer saturation.     The FAN4800 includes a folded-back current limit for the PWM section to provide short-circuit protection.

    Features

    • Low start-up current(100µA typical)
    • Low operating current(2.5mA typical)
    • Low total harmonic distortion, high power factor
    • Pin-compatible upgrade for the ML4800
    • Average current, continuous, or discontinuous boost leading-edge PFC
    • Slew rate enhanced transconductance error amplifier for ultra-fast PFC response
    • Internally synchronized leading edge PFC and trailing edge PWM
    • Reduction of ripple current in the storage capacitor between the PFC and PWM sections
    • PWM configurable for current-mode or voltage-mode operation
    • Additional folded-back current limit for PWM section
    • 20V BiCMOS process
    • VIN OK guaranteed turn-on PWM at 2.25V
    • VCC OVP comparator, low-power detect comparator
    • Current-fed gain modulator for improved noise immunity
    • Brownout control, over-voltage protection, UVLO, soft-start, and reference OK
    • Available in 16-DIP package
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    Index Product Product &
    Eco Status
    Replacement Part Number Packing Method Convention Package Marking
    Convention*
    Qualification
    Support
    Compliance
    Certificates
    2 FAN4800IN_G Obsolete as of 12-Mar-2013
    Green as of Jun 2010
    FAN4800AUN

    MDIP 16L -  Details
    3.3 x 6.3 x 19.18mm,  RAIL

    PDF MDIP 16L  Drawing
    Last Update: Feb 2012 PDF SiTEC DIP16 tube drawing
    Last Update: Sep 2014
    Line 1$Y (Fairchild logo)
    &Z (Plant Code)
    &4 (4-Digit Date Code)
    &K

    Line 2FAN4800IN

    RƟJA 80°C/W

    PDF RoHS IPC1752
    XML RoHS IPC1752
    PDF RoHS/REACH/JIG
    2 FAN4800IN Obsolete as of 21-Sep-2011
    ROHS Compliant as of 27-Feb-2006
    FAN4800AUN

    MDIP 16L -  Details
    3.3 x 6.3 x 19.18mm,  RAIL

    PDF MDIP 16L  Drawing
    Last Update: Feb 2012 PDF SiTEC DIP16 tube drawing
    Last Update: Sep 2014
    Line 1$Y (Fairchild logo)
    &Z (Plant Code)
    &4 (4-Digit Date Code)
    &K

    RƟJA 80°C/W

    PDF RoHS IPC1752
    XML RoHS IPC1752
    PDF RoHS/REACH/JIG
    • Desktop PC
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