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Datasheet Linear Technology LTC4278

ManufacturerLinear Technology
SeriesLTC4278

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

Datasheets

  • Download » Datasheet PDF, 516 Kb, Revision: C, File uploaded: Oct 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 0.7О© (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 Г— 4mm DFN Package The LTCВ®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 ...

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Packaging

Parametrics

LTC4278CDKD#PBFLTC4278CDKD#TRPBFLTC4278IDKD#PBFLTC4278IDKD#TRPBF
Number of Channels1111
Demo BoardsDC1561BDC1561BDC1561BDC1561B
Design ToolsLTspice ModelLTspice ModelLTspice ModelLTspice Model
Export Controlnononono
I2C Interfaceyesyesyesyes
IEEE-Compliant ClassificationOne Event, Two EventOne Event, Two EventOne Event, Two EventOne Event, Two Event
IEEE-Compliant DetectionYes (Internal 25k resistor)Yes (Internal 25k resistor)Yes (Internal 25k resistor)Yes (Internal 25k resistor)
IEEE-Compliant DisconnectionN/AN/AN/AN/A
Max Power, W25.525.525.525.5
Operating Temperature Range, °C0 to 700 to 70-40 to 85-40 to 85
PSE/PDPDPDPDPD
PoE Type2222

Eco Plan

Moldel Line

Series: LTC4278 (4)

Manufacturer's Classification

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

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