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    首頁產(chǎn)品索引NCP1254

    NCP1254

    購買收藏
    ?PWM Controller, Current Mode, for Offline Power Supplies

    制造商：ON

    中文數(shù)據(jù)手冊

    產(chǎn)品信息

    The NCP1254 is a highly integrated PWM controller capable of delivering a rugged and high performance offline power supply in a TSOP-6 package. With a supply range up to 35 V, the controller hosts a jittered 65-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 a minimum level of 26 kHz. As the power further goes down, the part enters skip cycle while freezing the peak current setpoint.
    To help building rugged converters, the controller features several key protective features: a non-dissipative Over Power Protection for a constant maximum output current regardless of the input voltage, two latched over voltage protection inputs - either through a dedicated pin or via the Vcc input and a dual-level auto-recover/latched overload/short-circuit timer.
    The controller architecture is designed to authorize a transient peak power excursion when the current setpoint hits the limit. At this point, the switching frequency is increased form 65 kHz to 130 kHz until the peak event disappears. The timer duration is then modulated as the converter crosses a peak power excursion mode (long) or undergoes a short circuit (short).
    • 65kHz Fixed Frequency Current Mode control with 130 kHz frequency excursion
    • Internal and adjustable Over Power Protection (OPP) circuit
    • Frequency Foldback down to 26 kHz and Skip-cycle in light load conditions
    • Timer-based Auto-recovery Overload/Short-circuit protection with 100% to 25% timer reduction for short-circuit faults
    • Frequency Jittering in Normal and Frequency Foldback Modes
    • Latch Input
    • Double Vcc hiccup in fault mode

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    型號制造商描述購買
    NCP1254ASN65T1GONIC OFF-LINE CNTRLR PWM CM 立即購買
    NCP1254BSN65T1GONIC REG CTRLR FLYBK ISO PWM 立即購買

    技術(shù)資料

    標(biāo)題類型大小（KB）下載
    Current-Mode PWM Controller for Off-line Power SuppliesPDF370 點擊下載
    TSOP-6PDF62 點擊下載
    NCP1254_PO.PNGUNKNOW9 點擊下載
    NCP1254_MS.PNGUNKNOW17 點擊下載
    NCP1254_PD.PNGUNKNOW5 點擊下載
    NCP1254_AD.PNGUNKNOW38 點擊下載
    Switch Mode: High Efficiency Switching Regulators for Consumer Electronics UNKNOW136 點擊下載

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