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    首頁(yè)產(chǎn)品索引NCP1250

    NCP1250

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    ?PWM Controller, Current Mode, for Offline Power Supplies

    制造商:ON

    中文數(shù)據(jù)手冊(cè)

    產(chǎn)品信息

    The NCP1250 is a highly integrated PWM controller capable of delivering a rugged and high performance offline power supply in a tiny TSOP-6 package. With a supply range up to 28 V, the controller hosts a jittered 65 kHz 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 a minimum level of 26 kHz. As the power further goes down, the part enters skip cycle while limiting the peak current. 40W Adapter
    Over Power Protection (OPP) is a difficult exercise especially when no-load standby requirements drive the converter specifications. The ON proprietary integrated OPP lets you harness the maximum delivered power without affecting your standby performance simply via two external resistors. An Over Voltage Protection input is also combined on the same pin and protects the whole circuitry in case of optocoupler failure or adverse open loop operation.
    Finally, a timer-based short-circuit protection offers the best protection scheme, letting you precisely select the protection trip point irrespective of a loose coupling between the auxiliary and the power windings.
    • Non-dissipative internal and adjustable Over Power Protection (OPP) circuits
    • Frequency Foldback down to 26 kHz and Skip-Cycle in light load conditions
    • Internal Ramp Compensation
    • Frequency jittering from full load to skip-cycle
    • Latch input for OVP and OTP implementations
    • See NCP1251 for integrated Over Voltage Protection (OVP) monitoring on the Vcc pin

    電路圖、引腳圖和封裝圖

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    型號(hào)制造商描述購(gòu)買(mǎi)
    NCP1250BP65GONNCP1250 是一款高度集成的 PWM 控制器,適用于離線(xiàn)電源供應(yīng)。它可以在小型 TSOP-6 或 PDIP-8 封裝中提供堅(jiān)固且高性能的電源管理功能。該控制器支持 65kHz 或 100kHz 的開(kāi)關(guān)頻率,并具有頻率折返和跳周期模式,以?xún)?yōu)化輕載條件下的性能。此外,它還具有內(nèi)部軟啟動(dòng)、過(guò)功率保護(hù) (OPP) 和短路保護(hù)等功能。 立即購(gòu)買(mǎi)
    NCP1250ASN100T1GONConverter Offline Flyback Topology 100kHz 6-TSOP 立即購(gòu)買(mǎi)
    NCP1250BSN100T1GONIC PWM CTLR OCP AUTO 立即購(gòu)買(mǎi)
    NCP1250ASN65T1GONNCP1250 是一款高度集成的 PWM 控制器,能夠在極小型 TSOP-6 封裝內(nèi)提供耐用的高性能離線(xiàn)電源。該控制器供電范圍高達(dá) 28 V,具有帶抖動(dòng)的 65 kHz 或 100 kHz 開(kāi)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(kāi)始降低時(shí),該控制器將其開(kāi)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(guò)周期,同時(shí)對(duì)峰值電流進(jìn)行限制。 40W 適配器過(guò)功率保護(hù) (OPP) 是一種非常困難的措施,尤其當(dāng)無(wú)負(fù)載待機(jī)要求驅(qū)動(dòng)轉(zhuǎn)換器規(guī)格時(shí)更是如此。安森美半導(dǎo)體的專(zhuān)屬集成 OPP 讓您僅通過(guò)兩個(gè)外部電阻即可充分利用提供的最高功率,而不會(huì)影響待機(jī)性能。同一個(gè)引腳上還組合了過(guò)電壓保護(hù)輸入,用于在發(fā)生光耦合器故障或反向開(kāi)路運(yùn)行時(shí)保護(hù)整個(gè)電路。最后,基于計(jì)時(shí)器的短路保護(hù)提供了最佳保護(hù)方案,讓您能夠精確選擇保護(hù)跳閘點(diǎn),而不用考慮輔助繞組和電源繞組之間的松散耦合。 立即購(gòu)買(mǎi)
    NCP1250BSN65T1GONNCP1250 是一款高度集成的 PWM 控制器,能夠在極小型 TSOP-6 封裝內(nèi)提供耐用的高性能離線(xiàn)電源。該控制器供電范圍高達(dá) 28 V,具有帶抖動(dòng)的 65 kHz 或 100 kHz 開(kāi)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(kāi)始降低時(shí),該控制器將其開(kāi)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(guò)周期,同時(shí)對(duì)峰值電流進(jìn)行限制。 40W 適配器過(guò)功率保護(hù) (OPP) 是一種非常困難的措施,尤其當(dāng)無(wú)負(fù)載待機(jī)要求驅(qū)動(dòng)轉(zhuǎn)換器規(guī)格時(shí)更是如此。安森美半導(dǎo)體的專(zhuān)屬集成 OPP 讓您僅通過(guò)兩個(gè)外部電阻即可充分利用提供的最高功率,而不會(huì)影響待機(jī)性能。同一個(gè)引腳上還組合了過(guò)電壓保護(hù)輸入,用于在發(fā)生光耦合器故障或反向開(kāi)路運(yùn)行時(shí)保護(hù)整個(gè)電路。最后,基于計(jì)時(shí)器的短路保護(hù)提供了最佳保護(hù)方案,讓您能夠精確選擇保護(hù)跳閘點(diǎn),而不用考慮輔助繞組和電源繞組之間的松散耦合。 立即購(gòu)買(mǎi)

    技術(shù)資料

    標(biāo)題類(lèi)型大?。↘B)下載
    The NCP1250, a Versatile Tiny Controller for Offline ConvertersPDF271 點(diǎn)擊下載
    A 60 W ac-dc Demonstrator with NCP1250PDF490 點(diǎn)擊下載
    Loop Control Design of an ac-dc Adapter Using the NCP1250PDF357 點(diǎn)擊下載
    OrCAD Models for NCP1250RAR105 點(diǎn)擊下載
    ICAPS Flyback Drawing with NCP1250UNKNOW315 點(diǎn)擊下載
    PWM Controller, Current Mode, for Offline Power SuppliesPDF284 點(diǎn)擊下載
    A 12V/40W Demonstrator with NCP1250PDF128 點(diǎn)擊下載
    Tips and Tricks for NCP1250PDF242 點(diǎn)擊下載

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