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Datasheet Linear Technology LT8311

ManufacturerLinear Technology

Synchronous Rectifier Controller with Opto-Coupler Driver for Forward Converters


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    LT8311 - Synchronous Rectifier Controller with Opto-Coupler Driver for Forward Converters
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    Synchronous Rectifier
    Controller with Opto-Coupler
    Driver for Forward Converters
    DESCRIPTION FEATURES Wide Input Supply Range: 3.7V to 30V
    n Preactive Mode: n No Pulse Transformer Required n DCM Operation at Light Load
    n SYNC Mode: n FCM or DCM Operation at Light Load n Achieves Highest Efficiency
    n 1.5% Feedback Voltage Reference
    n 10mA Opto-Coupler Driver
    n Output Power Good Indicator
    n Integrated Soft-Start Function The LTВ®8311 is used on the secondary side of a forward
    converter to provide synchronous MOSFET control and
    output voltage feedback through an opto-coupler. The
    LT8311’s unique preactive mode allows control of the
    secondary-side MOSFETs without requiring a traditional
    pulse transformer for primary-to secondary-side communication. In preactive mode, the output inductor current
    operates in discontinuous conduction mode (DCM) at
    light load. If forced continuous mode (FCM) operation is
    desired at light load, the LT8311 can, alternatively, be used
    in SYNC mode, where a pulse transformer is required to
    send synchronous control signals from the primary-side
    IC to the LT8311. n APPLICATIONS Offline and HV Car Battery Isolated Power Supplies 48V Isolated Power Supplies
    n Industrial, Automotive and Military Systems The LT8311 offers a full featured opto-coupler controller, ...





Export Control, yes/nonononononononono
Number of Outputs11111111
Operating Temperature Range, °C0 to 850 to 85-40 to 125-40 to 125-40 to 85-40 to 85-55 to 125-55 to 125
Vin Max, V3030303030303030
Vin Min, V3.

Eco Plan


Moldel Line

Series: LT8311 (8)

Manufacturer's Classification

  • Power Management > Power Control > Secondary Side Controllers
  • Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Power Management

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