CrCM PFC Controller, PFC-Ready Signal

Not Recommended For New Design as of 09-Apr-2012

    The FAN7930 is an active power factor correction (PFC) controller for boost PFC applications that operate in critical conduction mode (CRM). It uses a voltage-mode PWM that compares an internal ramp signal with the error amplifier output to generate a MOSFET turn-off signal. Because the voltage-mode CRM PFC controller does not need rectified AC line voltage information, it saves the power loss of an input voltage sensing network necessary for a current-mode CRM PFC controller.

    FAN7930 provides over-voltage protection, openfeedback protection, over-current protection, inputvoltage- absent detection, and under-voltage lockout protection. The PFC-ready pin can be used to trigger other power stages when PFC output voltage reaches the proper level with hysteresis. The FAN7930 can be disabled if the INV pin voltage is lower than 0.45V and the operating current decreases to a very low level. Using a new variable on-time control method, THD is lower than the conventional CRM boost PFC ICs.


    • PFC Ready Signal
    • Input Voltage Absent Detection Circuit
    • Maximum Switching Frequency Limitation
    • Internal Soft-Start and Startup without Overshoot
    • Internal Total Harmonic Distortion (THD) Optimizer
    • Precise Adjustable Output Over-Voltage Protection
    • Open-Feedback Protection and Disable Function
    • Zero Current Detector
    • 150µs Internal Startup Timer
    • MOSFET Over-Current Protection
    • Under-Voltage Lockout with 3.5V Hysteresis
    • Low Startup and Operating Current
    • Totem-Pole Output with High State Clamp
    • +500/-800mA Peak Gate Drive Current
    • 8-Pin SOP
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    Product Product &
    Eco Status
    Replacement Part Number Packing Method Convention Package Marking
    FAN7930MX Not Recommended For New Design as of 09-Apr-2012
    Green as of Oct 2014
     China RoHS

    SO 8L NB  -  Details
    1.75 x 3.9 x 4.9mm,  TAPE REEL

    PDF SO 8L NB  Drawing
    Last Update: Nov 2015 PDF MO8A SON8, Packing Drawing
    Last Update: Oct 2015 PDF SOIC 8L TR packing drawing
    Last Update: May 2013 PDF SOIC 8L PACKING DRAWING
    Last Update: May 2013 PDF SOIC 8L PACKING DRAWING
    Last Update: May 2013 PDF SOIC Tape And Reel Packing Drawing
    Last Update: Jun 2016
    Line 1$Y (Fairchild logo)
    &Z (Plant Code)
    &2 (2-Digit Date Code)

    Line 2FAN

    Line 37930

    FIT [Calculate] 8.72 @55°C
    MTBF 1.15E8

    ESD (HBM) 2500V

    Moisture Sensitivity Level (MSL) 1

    Max Reflow Temp 260

    PDF RoHS IPC1752
    XML RoHS IPC1752
    PDF China RoHS
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    Application Note Description
    AN-8035 PDFDesign Consideration for Boundary Conduction Mode Power Factor Correction (PFC) Using FAN7930
    Last Update : 13-Jan-2014
    AN-9738 PDFDesign Guideline on 150W Power Supply for LED Street Lighting Design Using FL7930B and FAN7621S
    Last Update : 20-Apr-2011

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    (0.3 - 1.4)
    T use (°C)
    T Stress (°C)
    Kt (eV/K)
    Device Hours
    @ T Stress
    FIT @ T use
    MTBF @ T
    use (hours)
    FAN7930MX 0.7 0.6 55 150 8.62E-05 405524.74 0 1.83 259.24 8.72
    Run new FIT calculation
    FAN7930M 0.7 0.6 55 150 8.62E-05 405524.74 0 1.83 259.24 8.72
    Run new FIT calculation