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Datasheet Linear Technology LTC3900

ManufacturerLinear Technology

Synchronous Rectifier Driver for Forward Converters


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    LTC3900 - Synchronous Rectifier Driver for Forward Converters
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    Synchronous Rectifier Driver
    for Forward Converters
    Features n n n n n n n n Description N-Channel Synchronous Rectifier MOSFET Driver
    Programmable Timeout Protection
    Reverse Inductor Current Protection
    Pulse Transformer Synchronization
    Wide VCC Supply Range: 4.5V to 11V
    15ns Rise/Fall Times at VCC = 5V, CL = 4700pF
    Undervoltage Lockout
    Small SO-8 Package The LTCВ®3900 is a secondary-side synchronous rectifier driver designed to be used in isolated forward converter power supplies. The chip drives N-channel rectifier
    MOSFETs and accepts pulse sychronization from the
    primary-side controller via a pulse transformer.
    The LTC3900 incorporates a full range of protection for the
    external MOSFETs. A programmable timeout function is
    included that disables both drivers when the synchronization signal is missing or incorrect. Additionally, the chip
    senses the output inductor current through the drain-source
    resistance of the catch MOSFET, shutting off the MOSFET
    if the inductor current reverses. The LTC3900 also shuts
    off the drivers if the supply voltage is too low. Applications 48V Input Isolated DC/DC Converters Isolated Telecom Power Supplies
    n High Voltage Distributed Power
    Step-Down Converters
    n Industrial Control System Power Supplies ...




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, V1111111111111111
Vin Min, V4.

Eco Plan

Moldel Line

Series: LTC3900 (8)

Manufacturer's Classification

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

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