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Datasheet Linear Technology LT8309HS5#TR

Linear Technology LT8309HS5#TR

Производитель:Linear Technology
Серия:LT8309
Модель:LT8309HS5#TR

Синхронный драйвер MOSFET вторичной стороны, имитирующий поведение выходного диода посредством измерения напряжения сток-исток МОП-транзистора и определения моментов его включения или выключения

Datasheets

  • Скачать » Datasheet, PDF, 232 Кб
    LT8309 - Secondary-Side Synchronous Rectifier Driver
    Выписка из документа ↓
    LT8309
    Secondary-Side
    Synchronous Rectifier Driver
    Features Description Works with DCM and BCM/CrCM Conduction Mode
    Flyback Topologies
    n V : 4.5V to 40V
    CC
    n Supports Up to 150V MOSFETs
    n 26ns Turn-Off Propagation Delay
    n Accurate Minimum On and Off Timers for Reliable
    Operatio Adjustable and Accurate Trip Point: +5mV to –30mV
    n 1О© Gate Driver Pull-Dow SOT-23 5-Lead Package The LTВ®8309 is a secondary-side synchronous rectifier
    driver that replaces the output rectifier diode in a flyback
    topology. By replacing the diode with a N-channel MOSFET,
    applications are no longer restricted by the heat constraints
    of the output diode. The IC replicates the behavior of a
    diode by sensing the drain-to-source voltage to determine
    when the current becomes negative. The LT8309's low
    minimum on-and off-times help improve noise immunity. n The fast propagation delay of 26ns allows applications to
    operate in discontinuous conduction mode (DCM) and
    critical conduction mode (CrCM). The gate driver features
    a 0.8О© pull-down device for fast turn-offs. The 40V VCC
    rating allows the part to be driven from the output voltage or the rectified drain voltage of the MOSFET. A low ...

Цены

    IC RECTIFIER DRVR SYNC TSOT23-5
    Цена LT8309HS5#TR
    ПоставщикПроизводительНаименованиеЦена
    5 элементLinear TechnologyLT8309HS5#TRPBF251 руб.
    ЭлитанLinear TechnologyLT8309HS5256 руб.
    Подробнее об условиях поставки »

Классификация производителя

  • Power Management > Power Control > Secondary Side Controllers

Варианты написания: LT8309HS5TR, LT8309HS5 TR

Выписка из документа:
LT8309 Secondary-Side Synchronous Rectifier Driver FeaTures n DescripTion
The LT®8309 is a secondary-side synchronous rectifier driver that replaces the output rectifier diode in a flyback topology. By replacing the diode with a N-channel MOSFET, applications are no longer restricted by the heat constraints of the output diode. The IC replicates the behavior of a diode by sensing the drain-to-source voltage to determine when the current becomes negative. The LT8309's low minimum on-and off-times help improve noise immunity. The fast propagation delay of 26ns allows applications to operate in discontinuous conduction mode (DCM) and critical conduction mode (CrCM). The gate driver features a 0.8 pull-down device for fast turn-offs. The 40V VCC rating allows the part to be driven from the output voltage or the rectified drain voltage of the MOSFET. A low quiescent current of 400µA maximizes efficiency at low output currents.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Works with DCM and BCM/CrCM Conduction Mode Flyback Topologies VCC: 4.5V to 40V Supports Up to 150V MOSFETs 26ns Turn-Off Propagation Delay Accurate Minimum On and Off Timers for Reliable Operation Adjustable and Accurate Trip Point: +5mV to ­30mV 1 Gate Driver Pull-Down SOT-23 5-Lead Package applicaTions High Output Current Flybacks High Efficiency Flybacks Typical applicaTion
40W, 5V Isolated Telecom Supply
VIN 36V TO 72V 5.33:1 10µF 15.4k 412k EN/UVLO VIN RFB RREF 60 100pF 147k 6.04k TC 30.9k 0.1µF SS VC 12.1k 15nF GATE SENSE GND INTVCC 4.7µF VOUT + 5V, 8A 100 95 90 EFFICIENCY (%) 85 80 75 70 VOUT­
8309 TA01a Efficiency vs Load Current 10 1µF 2.2k VCC...

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