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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
    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

LTC4278CDKD#PBFLTC4278CDKD#TRPBFLTC4278IDKD#PBFLTC4278IDKD#TRPBF
Package7x4 DFN-327x4 DFN-327x4 DFN-327x4 DFN-32
Package CodeDKDDKDDKDDKD

Parametrics

LTC4278CDKD#PBFLTC4278CDKD#TRPBFLTC4278IDKD#PBFLTC4278IDKD#TRPBF
Number of Channels1111
Demo BoardsDC1561BDC1561BDC1561BDC1561B
DescriptionIEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux SupportIEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux SupportIEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux SupportIEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support
Design ToolsLTspice ModelLTspice ModelLTspice ModelLTspice Model
Export Control, yes/nonononono
I2C Interface, yes/noyesyesyesyes
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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