National Semiconductor | High-performance Analog

 

 LM5071   
Power Over Ethernet PD Controller with Auxiliary Power Interface from the PowerWise® Family		 Click link to Download

Features
  • Compatible with 12V ac adapters
  • Fully Compliant 802.3af Power Interface Port
  • 80V, 1, 400 mA Internal MOSFET
  • Detection Resistor Disconnect Function
  • Programmable Classification Current
  • Programmable Under-voltage Lockout with Programmable Hysteresis
  • Thermal Shutdown Protection
  • Auxiliary Power Enable Pin
  • Current Mode Pulse Width Modulator
  • Supports both Isolated and Non-Isolated Applications
  • Error Amplifier and Reference for Non-Isolated Applications
  • Programmable Oscillator Frequency
  • Programmable Soft-start
  • 80% Maximum Duty Cycle Limiter, Slope Compensation (-80 device)
  • 50% Maximum Duty Cycle Limiter, No Slope Compensation (-50 device)

    • Description

    The LM5071 power interface port and pulse width modulation (PWM) controller provides a complete integrated solution for Powered Devices (PD) that connect into Power over Ethernet (PoE) systems. The LM5071 is specifically designed for the PD that must accept power from auxiliary sources such as ac adapters. The auxiliary power interface of the LM5071 activates the PWM controller when the ac adapter is connected to power the PD when PoE network power is unavailable. The LM5071 integrates an 80V, 400mA line connection switch and associated control for a fully IEEE 802.3af compliant interface with a full featured current mode pulse width modulator dc-dc converter. All power sequencing requirements between the controller interface and switch mode power supply (SMPS) are integrated into the IC.

    Also Recommended
    LM5068▲Negative Voltage Hot Swap Controller
    LM5070▲Integrated Power Over Ethernet PD Interface And PWM Controller
    LM5072▲Higher Transient Voltages (100V), Supplies More Current (750mA) And Compatible With Auxiliary Power



    Typical Application
    *click for larger image


    		Block Diagram
    *click for larger image



    Typical Performance
    click for larger image


    Parameters / ValuesLM5071 LM5068 LM5070 LM5072
    Input Min Voltage9.5 Volt -90 Volt 1.8 Volt 9 Volt
    Input Max Voltage60 Volt -10 Volt 75 Volt 100 Volt
    Frequency Min50 kHz 50 kHz 50 kHz
    Frequency Max1000 kHz 1000 kHz 1000 kHz
    Reference Accuracy (+/-)2 % 2.0 % 2 %
    Current Draw with AUX Winding (typ)0.7 mA 0.7 mA 0.7 mA
    Special FeaturesAuxiliary power interface, Fully compliant IEEE 802.3af PD interface, Error amplifier for non-isolated designs, leading edge blanking, high current gate drive Fully compliant IEEE 802.3af PD interface, error amplifier for non-isolated designs, leading edge blanking, high current gate drive 100V PD hot swap MOSFET, adjustable DC current limit, Auxiliary power interface
    On/Off PinYes Yes Yes
    PowerGood / Error FlagYes No Yes
    Adjustable OutputYes Yes Yes
    Output Min1.25 Volt 1.25 Volt 1.25 Volt
    Output Range1.25 and above 1.25V and above 1.25V and above
    Output Power13 Watt 13 Watt 25 Watt
    Adj Switch FrequencyYes Yes Yes
    Efficiency (peak)90.5 % 90.5 % 90.5 %
    TopologySingle Ended Single Ended Single Ended
    FlybackYes Yes Yes
    InvertingYes Yes Yes
    Step-UpYes Yes Yes
    Step-DownYes Yes Yes
    RegTypeSwitching Controller Hot Swap Controller Switching Controller Switching Controller
    Temperature Min-40 deg C -40 deg C -40 deg C -40 deg C
    Temperature Max125 deg C 105 deg C 125 deg C 125 deg C
    PowerWiseYes Yes Yes

    Datasheets
    TitleSizeDateOther
    Language
    LM5071 Power Over Ethernet PD Controller with Auxiliary Power Interface859
    Kbytes    		4-Jan-06   


    Application Notes
    TitleSizeDateOther
    Language
    AN-1430: Application Note 1430 LM5071 Evaluation Board738
    Kbytes    		4-Jan-06 
    AN-1474: Application Note 1474 The LM507X Family of PoE Devices: Frequently Asked Questions (FAQs)457
    Kbytes    		10-May-06 中文


    Other Technical Documents
    TitleTypeDate
    Get The Scoop On How To Power Share Between Isolated PoE ChannelsExternal Article 2007-06-04
    Power Supply Design for Power-over-Ethernet ApplicationsPower Designer 2007-03-22
    Auxiliary Power Extends PoE ApplicationsTechnology Edge 2006-04-01

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5071MT-50/NOPB


    RoHS Status

    TSSOP    		Full production
    Lead Time: 8 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide179
    AVNET-EMWorldwide225
    DIGI-KEYWorldwide1591
    NEWARKAmericas847
    TAYLORAmericas179
    		$1.45 each at 1K+ pcsrail
    of
    92
    LM5071MT-80/NOPB

    LM5071MT-80

    RoHS Status

    TSSOP    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide64
    AVNET-EMWorldwide127
    DIGI-KEYWorldwide389
    FARNELLEurope and Asia82
    MOUSERWorldwide276
    NEWARKAmericas2313
    TAYLORAmericas64
    		$1.45 each at 1K+ pcsrail
    of
    92
    LM5071MTX-50/NOPB

    LM5071MTX-50

    RoHS Status

    TSSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.45 each at 1K+ pcsreel
    of
    2500
    LM5071MTX-80/NOPB


    RoHS Status

    TSSOP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AITGAsia Pacific1001
    AVNET-EMWorldwide2500
    DIGI-KEYWorldwide0
    		$1.45 each at 1K+ pcsreel
    of
    2500

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM5071.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM5071 is located at RoHS Status.

    Part Number(s)
    (NSID)    		DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM5071EVAL/NOPB

    		Power Over Ethernet PD Controller with Auxiliary Power InterfaceFull production
    Lead Free (RoHS)

     
    DistributorRegionQty
    AVNET-EMWorldwide2
    DIGI-KEYWorldwide0
    MOUSERWorldwide2
    		$123.00 each1

    LM5071 Power Over Ethernet PD Controller with Auxiliary Power Interface

    Features:

    • Detection Resistor Disconnect Function
    • Programmable Classification Current
    • Programmable Under-Voltage Lockout with Programmable Hysteresis
    • Thermal Shutdown Protection
    • Auxiliary Power Enable Pin
    • Current Mode Pulse Width Modulator
    • Supports Both Isolated and Non-Isolated Applications
    • Error Amplifier and Reference for Non-Isolated Applications
    • Programmable Oscillator Frequency
    • Programmable Soft-Start
    • 80% Maximum Duty Cycle Limiter, Slope Compensation (-80 Device)
    • 50% Maximum Duty Cycle Limiter, No Slope Compensation (-50 Device)

    Contents:

    • A fully assembled LM5071MT-80 evaluation board.
    • LM5071 datasheet
    • LM5071 evaluation board appnote



    National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

    Lead Free product status is available through the search tool located here

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM5071MT-50/NOPB

    		56.74
    		TSSOP161260DetailDownloadspice file
    		NSUZXYTT
    5071MT
    -50
    LM5071MT-80/NOPB

    LM5071MT-80
    		56.74
    57
    		TSSOP161
    1    		260
    260    		DetailDownloadspice file
    		NSUZXYTT
    5071MT
    -80
    LM5071MTX-50/NOPB

    LM5071MTX-50
    		56.74
    57
    		TSSOP161
    1    		260
    260    		DetailDownloadspice file
    		NSUZXYTT
    5071MT
    -50
    LM5071MTX-80/NOPB

    		56.74
    		TSSOP161260DetailDownloadspice file
    		NSUZXYTT
    5071MT
    -80

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM5071.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM5071 is located at RoHS Status.

    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM5071MT-50ABCD150XV1038680025950002736338335
    LM5071MT-80ABCD150XV1038680025950002736338335
    LM5071MTX-50ABCD150XV1038680025950002736338335
    LM5071MTX-80ABCD150XV1038680025950002736338335

    Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

    For more information on Reliability Metrics, please click here.


    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM5071.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM5071 is located at RoHS Status.

    [Information as of 7-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation