» Datasheets » DC/DC преобразователи и контроллеры

Datasheet Linear Technology LT8309ES5#PBF

Secondary-Side Synchronous Rectifier Driver

Datasheets

• Скачать » Datasheet, PDF, 232 Кб, Версия: A, Файл закачен 31-07-2016
  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

Корпус / Упаковка / Маркировка

Параметры

Экологический статус

Статьи

• Скачать » Статьи - LT Journal, PDF, 376 Кб, 06-01-2014
  Increase Current Capability and Simplify Thermal Design of Flyback Converters with Secondary-Side Synchronous Rectifier Driver in a 5-Pin SOT-23
  Выписка из документа ↓
  Increase Current Capability and Simplify Thermal Design
  of Flyback Converters with Secondary-Side Synchronous
  Rectifier Driver in a 5-Pin SOT-23
  Wei Gu In a flyback converter, current levels in high current applications are constrained
  by heat produced in the output rectifier diode. The clear way to lift this restriction
  is to replace the diode with a much lower voltage drop MOSFET, significantly
  reducing heat produced in the rectifier—reduced heat dissipation increases output
  current capability and efficiency, and simplifies thermal design. The LT8309 is a
  secondary-side synchronous MOSFET driver that replicates the behavior of the
  output diode by sensing the drain-to-source voltage of the MOSFET to determine
  if should be on or off, allowing it to replace a less efficient rectifier diode.
  The LT8309 can be combined with any
  of Linear’s line of no-opto boundarymode flyback ICs (such as the LT3748
  primary side controller) to produce high
  performance isolated power supplies
  with a minimal number of components.
  5V, 8A ISOLATED SUPPLY Figure 1 shows a low voltage, high
  current, low parts count flyback
  supply. The traditional output diode is
  replaced by an ideal diode consisting
  of the LT8309, a MOSFET and a few
  small external components.
  For a MOSFET to act as a diode it must ...

Модельный ряд

• LT8309ES5#PBF LT8309ES5#TRMPBF LT8309ES5#TRPBF LT8309HS5#PBF LT8309HS5#TRMPBF LT8309HS5#TRPBF LT8309IS5#PBF LT8309IS5#TRMPBF LT8309IS5#TRPBF

Классификация производителя

• Power Management > Switching Regulator > Flyback, Forward and Isolated Controllers
• Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Power Management
• Power Management > Power Control > Secondary Side Controllers

Варианты написания:

LT8309ES5PBF, LT8309ES5 PBF

На английском языке: Datasheet Linear Technology LT8309ES5#PBF

Рекомендуемые материалы по теме:

• Datasheet Linear Technology LT8309ES5#TR
• Datasheet Linear Technology LT8309ES5#TRM
• Datasheet Linear Technology LT8309IS5
• Datasheet Linear Technology LT8309IS5#TR
• Datasheet Linear Technology LT8309IS5#TRM

При перепечатке материалов с сайта прямая ссылка на РадиоЛоцман обязательна.

Приглашаем авторов статей и переводов к публикации материалов на страницах сайта.