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    首頁(yè)產(chǎn)品索引NCP1239

    NCP1239

    購(gòu)買收藏
    ?Fixed Frequency Current Mode Controller for Flyback Converter with HV startup

    制造商：ON

    中文數(shù)據(jù)手冊(cè)

    產(chǎn)品信息

    The NCP1239 is a fixed-frequency current-mode controller featuring the Dynamic Self-Supply. This function greatly simplifies the design of the auxiliary supply and the Vcc capacitor by activating the internal startup current source to supply the controller during start-up, transients, latch, stand-by etc. With a supply range up to 35 V, the controller hosts a jittered 65 or 100-kHz switching circuitry operated in peak current mode control. When the power on the secondary side starts to decrease, the controller automatically folds back its switching frequency down to minimum level of 26 kHz. As the power further goes down, the part enters skip cycle while limiting the peak current that insures excellent efficiency in light load condition. It features a timer-based fault detection that ensures the detection of overload and an adjustable compensation to help keep the maximum power independent of the input voltage.
    • Fixed-frequency 65-kHz or 100-kHz current-mode control operation
    • Frequency foldback down to 26 kHz and skip mode
    • Adjustable Over Power Protection (OPP) circuit
    • High-voltage Current Source with Brown-out (BO) detection
    • High-voltage Current Source with Brown-out (BO) detection
    • Internal fixed 8-ms soft-start
    • Frequency jittering in normal and frequency foldback modes
    • 64-ms timer-based short-circuit protection with auto-recovery or latched operation
    • Pre-short ready
    • Latched OVP on Vcc (NCP1239 A & B versions)
    • Latched OVP/OTP input for improved robustness
    • +500 mA/ -500 mA peak source/sink drive capability
    • Internal thermal shutdown
    • Pin-to-pin compatible with the existing NCP1236/1247 series
    • Internal ramp compensation
    • 35-V Vcc operation

    在線購(gòu)買

    型號(hào)制造商描述購(gòu)買
    NCP1239ED65R2GONNCP1239 是一款固定頻率電流模式控制器，具有動(dòng)態(tài)自供電功能。此功能可激活內(nèi)部啟動(dòng)電流源使其在啟動(dòng)期間、瞬變、鎖存、待機(jī)等期間為控制器供電，大大簡(jiǎn)化了輔助電源和 Vcc 電容器的設(shè)計(jì)。 該控制器供電范圍高達(dá) 35 V，具有帶抖動(dòng)的 65 kHz 或 100 kHz 開關(guān)電路，在峰值電流模式控制下運(yùn)行。當(dāng)輔助側(cè)功率開始降低時(shí)，該控制器將其開關(guān)頻率自動(dòng)折回至最低 26 kHz 的水平。當(dāng)功率進(jìn)一步下降時(shí)，該零部件進(jìn)入跳過周期，同時(shí)對(duì)峰值電流進(jìn)行限制，確保輕型負(fù)載條件下的卓越能效。 它具有基于計(jì)時(shí)器的故障檢測(cè)可確保過載檢測(cè)，還具有可調(diào)節(jié)補(bǔ)償，有助于保持最大功率，而無論輸入電壓如何。 立即購(gòu)買
    NCP1239DD65R2GONNCP1239 是一款固定頻率電流模式控制器，具有動(dòng)態(tài)自供電功能。此功能可激活內(nèi)部啟動(dòng)電流源使其在啟動(dòng)期間、瞬變、鎖存、待機(jī)等期間為控制器供電，大大簡(jiǎn)化了輔助電源和 Vcc 電容器的設(shè)計(jì)。 該控制器供電范圍高達(dá) 35 V，具有帶抖動(dòng)的 65 kHz 或 100 kHz 開關(guān)電路，在峰值電流模式控制下運(yùn)行。當(dāng)輔助側(cè)功率開始降低時(shí)，該控制器將其開關(guān)頻率自動(dòng)折回至最低 26 kHz 的水平。當(dāng)功率進(jìn)一步下降時(shí)，該零部件進(jìn)入跳過周期，同時(shí)對(duì)峰值電流進(jìn)行限制，確保輕型負(fù)載條件下的卓越能效。 它具有基于計(jì)時(shí)器的故障檢測(cè)可確保過載檢測(cè)，還具有可調(diào)節(jié)補(bǔ)償，有助于保持最大功率，而無論輸入電壓如何。 立即購(gòu)買
    NCP1239CD65R2G-- 立即購(gòu)買
    NCP1239BD65R2G-- 立即購(gòu)買
    NCP1239BD100R2G-- 立即購(gòu)買
    NCP1239AD65R2G-- 立即購(gòu)買

    技術(shù)資料

    標(biāo)題類型大?。↘B）下載
    Fixed Frequency Current-Mode Controller for Flyback ConverterPDF239 點(diǎn)擊下載
    SOIC 7 CASE OUTLINEPDF60 點(diǎn)擊下載
    Upgrading NCP1236-Based Converters with NCP1239PDF1698 點(diǎn)擊下載
    A 65 W Adaptor with NCP1239 Fixed Frequency ControllerPDF1827 點(diǎn)擊下載
    NCP1239B65WGEVB Bill of Materials ROHS CompliantPDF62 點(diǎn)擊下載
    NCP1239B65WGEVB GERBER Layout Files (Zip Format)RAR580 點(diǎn)擊下載
    NCP1239B65WGEVB SCHEMATICPDF188 點(diǎn)擊下載
    NCP1239B65WGEVB TEST PROCEDUREPDF123 點(diǎn)擊下載

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