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  •   MC44608 Datasheet
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  • MC-4  -  Series DataSheet
    MC44608  -  Few External Components Reliable and Flexible SMPS Controller  -  ON Semiconductor  -  AC-DC Off-Line Controllers


      The MC44608 is a high performance voltage mode controller designed for off−line converters. This high voltage circuit that integrates the startup current source and the oscillator capacitor, requires few external components while offering a high flexibility and reliability.
      The device also features a very high efficiency standby management consisting of an effective Pulsed Mode operation. This technique enables the reduction of the standby power consumption to approximately 1.0 W while delivering 300 mW in a 150 W SMPS.
    General Features
    • Integrated Startup Current Source
    • Lossless Off−Line Startup
    • Direct Off−Line Operation
    • Fast Startup
    • Flexibility
    • Duty Cycle Control
    • Undervoltage Lockout with Hysteresis
    • On Chip Oscillator Switching Frequency 40 or 75
    • Secondary Control with Few External Components
    • Pb−Free Packages are Available* Protections
    • Maximum Duty Cycle Limitation
    • Cycle by Cycle Current Limitation
    • Demagnetization (Zero Current Detection) Protection
    • “Over VCC Protection” Against Open Loop
    • Programmable Low Inertia Over Voltage Protection Against Open Loop
    • Internal Thermal Protection SMPS Controller
    • Pulsed Mode Techniques for a Very High Efficiency Low Power Mode
    • Lossless Startup
    • Low dV/dT for Low EMI Radiations



    Click to view : MC44608.pdf   



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