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    KP4111

    Secondary Side Synchronous Rectifier (SR)
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    General Description

    KP4111 is a family of secondary side synchronous rectifier, that replaced Schottky diodes by combined with an ultra low on-state resistance power MOSFET for high-efficiency flyback converters. It supports High-Side and Low-Side in DCM and Quasi-Resonant Topologies.

    KP4111 is built-in HV supplies for VDD capacitor, that can eliminate the aux-winding of VDD supply for cost saving.

    KP4111 integrates protections of Under Voltage Lockout (UVLO), VDD Clamper.


    Features

    l   Secondary Side Synchronous Rectifier(SR) for Flyback converters

    l   Supports High-Side and Low-Side in DCM and Quasi-Resonant Topologies

    l   <300uA Low Quiescent Current

    l   Built-in HV Supplies without Aux-Winding for VDD supply

    l   Integrated with 50V Power MOSFET

    l   Built-in Protections:

    n  VDD UVLO

    n  VDD Clamper by >5mA sink current

    l   Available with SOP-8 Package


    Applications

    l   Flyback converters

    l   Chargers


    Pin Configuration

    Typical Application Circuit

    • High Side SR
    • Low Side SR

    Ordering Information

    Part Number

    Description

    KP4111SGA

    SOP-8, Halogen free in T&R, 4000Pcs/Reel


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