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    首頁產(chǎn)品索引UC2842B

    UC2842B

    購買收藏
    ?High Performance Current Mode PWM Controller

    制造商：ON

    中文數(shù)據(jù)手冊

    產(chǎn)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).
    • 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

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    型號(hào)制造商描述購買
    UC2842BDR2GONUC3842B、UC3843B 系列為高性能固定頻率電流模式控制器。此類器件專門針對(duì)離線和 DC-DC 轉(zhuǎn)換器應(yīng)用而設(shè)計(jì)，為設(shè)計(jì)人員提供了一種經(jīng)濟(jì)高效的方案，并最大限度減少了外部部件。這些集成電路具有實(shí)現(xiàn)精確占空比控制的微調(diào)振蕩器、溫度補(bǔ)償參考、高增益誤差放大器、電流感應(yīng)比較器和高電流圖騰柱輸出，適用于驅(qū)動(dòng)功率 MOSFET。此外，此外還包含以下保護(hù)功能：都具有遲滯的輸入和參考欠壓鎖定、逐周期電流限制、可編程輸出停滯時(shí)間以及用于單脈沖計(jì)量的鎖存。此類器件采用 8 引腳雙列直插和表面貼裝 (SO-8) 塑料封裝以及 14 引腳塑料表面貼裝 (SO-14) 封裝。SO-14 封裝具有用于圖騰柱輸出級(jí)的單獨(dú)電源和接地引腳。UCX842B 的 UVLO 閾值為 16 V（開）和 10 V（關(guān)），非常適用于離線轉(zhuǎn)換器。UCX843B 適用于 UVLO 閾值為 8.5 V（開）和 7.6 V（關(guān)）的較低電壓應(yīng)用。 立即購買
    UC2842BD1GON 立即購買
    UC2842BDGONUC3842B、UC3843B 系列為高性能固定頻率電流模式控制器。此類器件專門針對(duì)離線和 DC-DC 轉(zhuǎn)換器應(yīng)用而設(shè)計(jì)，為設(shè)計(jì)人員提供了一種經(jīng)濟(jì)高效的方案，并最大限度減少了外部部件。這些集成電路具有實(shí)現(xiàn)精確占空比控制的微調(diào)振蕩器、溫度補(bǔ)償參考、高增益誤差放大器、電流感應(yīng)比較器和高電流圖騰柱輸出，適用于驅(qū)動(dòng)功率 MOSFET。此外，此外還包含以下保護(hù)功能：都具有遲滯的輸入和參考欠壓鎖定、逐周期電流限制、可編程輸出停滯時(shí)間以及用于單脈沖計(jì)量的鎖存。此類器件采用 8 引腳雙列直插和表面貼裝 (SO-8) 塑料封裝以及 14 引腳塑料表面貼裝 (SO-14) 封裝。SO-14 封裝具有用于圖騰柱輸出級(jí)的單獨(dú)電源和接地引腳。UCX842B 的 UVLO 閾值為 16 V（開）和 10 V（關(guān)），非常適用于離線轉(zhuǎn)換器。UCX843B 適用于 UVLO 閾值為 8.5 V（開）和 7.6 V（關(guān)）的較低電壓應(yīng)用。 立即購買
    UC2842BNGON反激，升壓 穩(wěn)壓器 正，可提供隔離 輸出 升壓，升壓/降壓 DC DC 切換控制器 IC 8-PDIP 立即購買
    UC2842BD1R2GON反激，升壓 穩(wěn)壓器 正，可提供隔離 輸出 升壓，升壓/降壓 DC DC 切換控制器 IC 8-SOIC 立即購買

    技術(shù)資料

    標(biāo)題類型大小（KB）下載
    High Performance Current Mode ControllerPDF408 點(diǎn)擊下載
    SOIC-8 Narrow BodyPDF61 點(diǎn)擊下載
    SOIC-14 NBPDF33 點(diǎn)擊下載
    8 LEAD PDIPPDF34 點(diǎn)擊下載
    UC3842B_PKG.GIFUNKNOW16 點(diǎn)擊下載

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