中文AV岛国无码免费播放

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    UC2844/UC3845 pdf,UC2844/UC384

    資料大?。?/em> 446

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    上傳日期: 2008-09-06

    上 傳 者: 發燒友他上傳的所有資料

    資料介紹

    標簽:UC(33)
    UC3844, UC3845, UC2844,
    UC2845
    High Performance
    Current Mode Controllers
    The UC3844, UC3845 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 an oscillator, 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, a latch for single pulse metering, and a flip−flop which
    blanks the output off every other oscillator cycle, allowing output dead
    times to be programmed for 50% to 70%.
    These devices are available in an 8−pin dual−in−line plastic package
    as well as the 14−pin plastic surface mount (SOIC−14). The SOIC−14
    package has separate power and ground pins for the totem pole output
    stage.
    The UCX844 has UVLO thresholds of 16 V (on) and 10 V (off),
    ideally suited for off−line converters. The UCX845 is tailored for
    lower voltage applications having UVLO thresholds of 8.5 V (on) and
    7.6 V (off).

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    中文AV岛国无码免费播放

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