PSR Flyback PWM Controller with MOSFET Integrated for LED Lighting

Not Recommended For New Design as of 07-Feb-2013

    This third-generation Primary Side Regulation (PSR) and highly integrated PWM controller provides several features to enhance the performance of low-power flyback converters. The proprietary topology, TRUECURRENT®, of FSEZ1317 enables precise CC regulation and simplified circuit design for battery-charger applications. A low-cost, smaller, and lighter charger results, as compared to a conventional design or a linear transformer.

    To minimize standby power consumption, the proprietary green mode provides off-time modulation to linearly decrease PWM frequency under light-load conditions. Green mode assists the power supply in meeting power conservation requirements.

    By using the FSEZ1317, a charger can be implemented with few external components and minimized cost.


    • Low Standby Power Under 30mW
    • High-Voltage Startup
    • Fewest External Component Counts
    • Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary-Feedback Circuitry
    • Green-Mode: Linearly Decreasing PWM Frequency
    • Fixed PWM Frequency at 50kHz with Frequency Hopping to Solve EMI Problem
    • Cable Compensation in CV Mode
    • Peak-Current-Mode Control in CV Mode
    • Cycle-by-Cycle Current Limiting
    • VDD Over-Voltage Protection with Auto Restart
    • VDD Under-Voltage Lockout (UVLO)
    • Gate Output Maximum Voltage Clamped at 15V
    • Fixed Over-Temperature Protection with Auto Restart
    • Available in the 7-Lead SOP and DIP Packages
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    Product Product &
    Eco Status
    Replacement Part Number Packing Method Convention Package Marking
    FSEZ1317MY Not Recommended For New Design as of 07-Feb-2013
    Green as of Nov 2008

    SO 7L NB  -  Details
    1.750 x 3.912 x 4.902mm,  TAPE REEL

    PDF SO 7L NB  Drawing
    Last Update: Feb 2016
    Line 1$Y (Fairchild logo)
    &Z (Plant Code)
    &2 (2-Digit Date Code)

    Line 2EZ1317

    Line 3MYN

    ESD (HBM) 5000V

    RƟJA 150°C/W

    Moisture Sensitivity Level (MSL) 3

    Max Reflow Temp 260

    PDF RoHS IPC1752
    XML RoHS IPC1752
    FSEZ1317NY Not Recommended For New Design as of 07-Feb-2013
    Green as of Apr 2010

    MDIP 7L  -  Details
    3.4 x 6.4 x 9.2mm,  RAIL

    PDF MDIP 7L  Drawing
    Last Update: May 2016 PDF MDIP-7L, PACKING DRAWING
    Last Update: May 2013 PDF Dip 7 Tube drawing
    Last Update: Jan 2016
    Line 1$Y (Fairchild logo)
    &Z (Plant Code)
    &2 (2-Digit Date Code)

    Line 2EZ1317

    Line 3NYN

    ESD (HBM) 5000V

    RƟJA 150°C/W

    PDF RoHS IPC1752
    XML RoHS IPC1752

    If there is no sample button displayed at the top of the page, please contact one of the Fairchild distributors or your local sales office to obtain samples.
    * Click here for further top mark packaging information for FSEZ1317

    • Lighting
    • Mobile Handsets
    Application Document Number Featured Products Output
    Cell Phone Charger PDFRD-310
    3.5 W 90-265V<sub>AC</sub> Primary-Side Regulated Flyback Converter
    Application Note Description
    AN-8033 PDFDesign Guideline for Primary Side Regulated (PSR) Flyback Converter Using FAN103 and FSEZ13X7
    Last Update : 28-Jun-2014

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