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    KP401

    Secondary Side Synchronous Rectifier (SR) Controller
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    General Description

    KP401 is a secondary side synchronous rectifier controller, that replaced Schottky diodes by combined with an ultra low on-state resistance power switch for high-efficiency flyback converters. KP401 supports CCM, DCM and Quasi-Resonant Topologies based on the proprietary of “Self-Suitable Dead Time Control” technology. An integrated Error Amplifier with 1.25V reference voltage can replace TL431 for cost saving.

    KP401 integrates protections of Under Voltage Lockout (UVLO), Primary-Side switching on time Expansion and Shrink Protection.


    Features

    l   Secondary Side Synchronous Rectifier(SR) for flyback converters

    l   Supports CCM, DCM and Quasi-Resonant Topologies

    l   <300uA Low Quiescent Current

    l   Built-in 1.25V(±1.5%) Reference Voltage and Error Amplifier for Eliminating TL431

    l   Built-in Protections:

    n  VCC UVLO

    n  Primary-Side switching on time Expansion and Shrink Protection

    l   SOT23-6  packages available


    Applications

    l   Industrial Power Systems

    l   Battery Powered Systems

    l   Flyback Converters


    Pin Configuration

    Typical Application Circuit

    Ordering Information

    Part Number

    Description

    KP401LGA

    SOT23-6L, Pb free in T&R, 3000Pcs/Reel


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