首页产品索引UC3842B

    UC3842B

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     High Performance Current Mode PWM Controller

    制造商:ON

    中文数据手册

    产品信息

    The UC3842B, UC3843B series are high performance fixed frequency current mode controllers. They are specifically designed for Off-Line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.
    Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, programmable output deadtime, and a latch for single pulse metering.
    These devices are available in an 8-pin dual-in-line and surface mount (SO-8) plastic package as well as the 14-pin plastic surface mount (SO-14). The SO-14 package has separate power and ground pins for the totem pole output stage.
    The UCX842B has UVLO thresholds of 16 V (on) and 10 V (off), ideally suited for off-line converters. The UCX843B is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).


    优势特点

    • Trimmed Oscillator for Precise Frequency Control

    • Oscillator Frequency Guaranteed at 250 kHz

    • Current Mode Operation to 500 kHz

    • Automatic Feed Forward Compensation

    • Latching PWM for Cycle-By-Cycle Current Limiting

    • Internally Trimmed Reference with Undervoltage Lockout

    • High Current Totem Pole Output

    • Undervoltage Lockout with Hysteresis

    • Low Startup and Operating Current

    • Pb-Free Packages are Available


    规格参数

    uc3842b规格参数.png

    uc3842b规格参数1.png

    uc3842b规格参数2.png

    电路图、引脚图和封装图

    在线购买

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    技术资料

    标题类型大小(KB)下载
    SOIC-14 NBPDF33 点击下载
    8 LEAD PDIPPDF34 点击下载
    UC3842B_PKG.GIFUNKNOW16 点击下载
    High Performance Current Mode ControllerPDF408 点击下载
    SOIC-8 Narrow BodyPDF61 点击下载

    应用案例更多案例

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