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Datasheet Linear Technology LTC4278IDKD#TRPBF

ManufacturerLinear Technology
SeriesLTC4278
Part NumberLTC4278IDKD#TRPBF

IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support

Datasheets

  • Download » Datasheet, PDF, 516 Kb, Revision: C, File uploaded 10-25-2017
    LTC4278 - IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support
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    LTC4278
    IEEE 802.3at PD with
    Synchronous No-Opto Flyback
    Controller and 12V Aux Support
    DESCRIPTION FEATURES n n n n n n n n n 25.5W IEEE 802.3at Compliant (Type 2) PD
    10V to 57V Auxiliary Power Input
    Shutdown Pin for Flexible Auxiliary Power Support
    Integrated State-of-the-Art No-Opto Synchronous
    Flyback Controller
    – Isolated Power Supply Efficiency >92%
    – 88% Efficiency Including Diode Bridge and Hot Swap™ FET
    Superior EMI Performance
    Robust 100V 0.7Ω (Typ) Integrated Hot Swap MOSFET
    IEEE 802.3at High Power Available Indicator
    Integrated Signature Resistor and Programmable
    Class Current
    Undervoltage, Overvoltage and Thermal Protection
    Short-Circuit Protection with Auto-Restart
    Programmable Soft-Start and Switching Frequency
    Complementary Power Good Indicators
    Thermally Enhanced 7mm × 4mm DFN Package The LTC®4278 is an integrated Powered Device (PD) controller and switching regulator intended for high power
    IEEE 802.3at and 802.3af applications. With a wide input
    voltage range, the LTC4278 is specifically designed to support PD applications that include a low-voltage auxiliary ...

Prices

Packaging

Package7x4 DFN-32
Package CodeDKD
Package Index05-08-1734

Parametrics

Number of Channels1
Demo BoardsDC1561B
Design ToolsLTspice Model
Export Controlno
I2C Interfaceyes
IEEE-Compliant ClassificationOne Event, Two Event
IEEE-Compliant DetectionYes (Internal 25k resistor)
IEEE-Compliant DisconnectionN/A
Max Power25.5 W
Operating Temperature Range-40 to 85 °C
PSE/PDPD
PoE Type2

Eco Plan

RoHSCompliant

Moldel Line

Series: LTC4278 (4)

Manufacturer's Classification

  • Monitor, Control and Protection > Power-over-Ethernet (PoE) Interface Controllers > PoE Powered Device (PD)

Other Names:

LTC4278IDKDTRPBF, LTC4278IDKD TRPBF

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