LM5072 - Integrated 100V Power Over Ethernet PD Interface and PWM Controller with Aux Support from the PowerWise® Family

Datasheet Packaging Samples & Pricing Eval. Boards Design Tools Application Notes Knowledge Base

Features
PD InterfacePWM Controller
•Fully Compliant IEEE 802.3af PD Interface
•Versatile Auxiliary Power Options
•9V Minimum Auxiliary Power Operating Range
•100V Maximum Input Voltage Rating
•Programmable DC Current Limit Up To 800mA
•100V, 0.7Ω Hot Swap MOSFET
•Integrated PD Signature Resistor
•Integrated PoE Input UVLO
•Programmable Inrush Current Limit
•PD Classification Capability
•Power Good Indicator
•Thermal Shutdown Protection
•Current Mode PWM Controller
•100V Start-up Regulator
•Error Amplifier with 2% Voltage Reference
•Supports Isolated and Non-Isolated Applications
•Programmable Oscillator Frequency
•Programmable Soft-Start
•800 mA Peak Gate Driver
•80% Maximum Duty Cycle with Built-in Slope Compensation (-80 device)
•50% Maximum Duty Cycle, No Slope Compensation (-50 device)

General Description

The LM5072 Powered Device (PD) interface and Pulse-Width-Modulation (PWM) controller provides a complete power solution, fully compliant to IEEE 802.3af, for the PD connecting into Power over Ethernet (PoE) networks. More...


Applications

•IEEE 802.3af Compliant PoE Powered Devices
•Non-Compliant, Application Specific Devices
•Higher Power Ethernet Powered Devices
  Typical Application
*click for larger image


Parametric Table     expand
Parametric Table    collapse
Error Flag Yes
Output Range 1.25V and above
Output Power 25 Watt
Input Min Voltage 9 Volt
Input Max Voltage 100 Volt
Frequency Min 50000 Hz
Frequency Max 1000000 Hz
Reference Accuracy (+/-) 2 %
Current Draw with AUX Winding (typ) 0.7 mA
Special Features 100V PD hot swap MOSFET, adjustable DC current limit, Auxiliary power interface
On/Off Pin Yes
Error Flag Yes
Adjustable Output Yes
Output Min 1.25 Volt
Output Range 1.25V and above
Output Power 25 Watt
Adj Switch Frequency Yes
Efficiency (peak) 85 %
Topology Single Ended
Flyback Yes
Inverting Yes
Step-Up Yes
Step-Down Yes
RegType Switching Controller
Temperature Min -40 deg C
Temperature Max 125 deg C
PowerWise Yes
View Using Catalog


Typical Performance

*click for larger image


  Also Recommended
LM5073100V PoE PD Interface For Flexible DC-DC Regulator Selection

Additional Resources

Design Tools (see below)

Application Notes (see below)


Block Diagram

*click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM5072 Integrated 100V Power Over Ethernet PD Interface and PWM Controller with Aux Support 491 Kbytes 30-Oct-07 View Online
Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LM5072EVALIntegrated 100V Power Over Ethernet PD Interface and PWM Controller with Aux SupportFull productionN/A
 
Buy Now 		1+$134.001-
8 weeksN/A
POEPHYTEREV-EIntegrated 100V Power Over Ethernet PD Interface and PWM Controller with Aux SupportFull productionN/A
 
Buy Now 		1+$199.001-
8 weeksN/A
POEPHYTEREV-IIntegrated 100V Power Over Ethernet PD Interface and PWM Controller with Aux SupportFull productionN/A
 
Buy Now 		1+$199.001-
8 weeksN/A
LM5072MH-50TSSOP EXP PAD16NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.85rail
of
92		NSUZXYTT
LM5072
MH-50
16 weeks500
LM5072MH-80TSSOP EXP PAD16STD
NOPB		1
1		260
260		RoHS Download Full productionN/A
 
Buy Now 		1K+$1.85rail
of
92		NSUZXYTT
LM5072
MH-80
12 weeks500
LM5072MHX-50TSSOP EXP PAD16NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.85reel
of
2500		NSUZXYTT
LM5072
MH-50
16 weeks5000
LM5072MHX-80TSSOP EXP PAD16NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.85reel
of
2500		NSUZXYTT
LM5072
MH-80
16 weeks3000

General Description

The LM5072 Powered Device (PD) interface and Pulse-Width-Modulation (PWM) controller provides a complete power solution, fully compliant to IEEE 802.3af, for the PD connecting into Power over Ethernet (PoE) networks. This controller integrates all functions necessary to implement both a PD powered interface and DC-DC converter with a minimum number of external components. The LM5072 provides the flexibility for the PD to also accept power from auxiliary sources such as AC adapters in a variety of configurations. The low RDS(ON) PD interface hot swap MOSFET and programmable DC current limit extend the range of LM5072 applications up to twice the power level of 802.3af compliant PD devices. The 100V maximum voltage rating simplifies selection of the transient voltage suppressor that protects the PD from network transients. The LM5072 includes an easy-to-use PWM controller that facilitates the various single-ended power supply topologies including the flyback, forward and buck. The PWM control scheme is based on peak current mode control, which provides inherent advantages including line feed-forward, cycle-by-cycle current limit, and simplified feedback loop compensation. Two versions of the LM5072 provide either an 80% maximum duty cycle (-80 suffix), or a 50% maximum duty cycle (-50 suffix).

Design Tools

TitleSize in Kbytes Date Click link below to Download    
Power over Ethernet Consortium - Interoperability Test 563 Kbytes 17-Mar-2006 View Online Download  
Power over Ethernet Consortium - Clause 33 PD Conformance Test 450 Kbytes 17-Mar-2006 View Online Download  
Get The Scoop On How To Power Share Between Isolated PoE Channels     View    

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Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1474: Application Note 1474 The LM507X Family of PoE Devices: Frequently Asked Questions (FAQs) 457 Kbytes 10-May-06 Download
AN-1474 (Chinese): Application Note 1474 The LM507X Family of PoE Devices: Frequently Asked Questions (FAQs)
 388 Kbytes  
AN-1455: Application Note 1455 LM5072 Evaluation Board 708 Kbytes 30-Mar-06 Download
AN-1455 (Chinese): Application Note 1455 LM5072 Evaluation Board
 600 Kbytes  
AN-1521: Application Note 1521 POEPHYTEREV-I / -E User Guide 14913 Kbytes 4-Apr-08 Download
AN-1875: Application Note 1875 LM5073HE Evaluation Board With Active Bridge 230 Kbytes 2-Jul-08 Download
AN-1430: Application Note 1430 LM5071 Evaluation Board 738 Kbytes 4-Jan-06 Download
AN-1574: Application Note 1574 LM5073 Evaluation Board 464 Kbytes 24-Apr-07 Download

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More Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1358: Application Note 1358 LM5070 'AE' Evaluation Board 787 Kbytes 27-Jan-05 Download
AN-1408: Application Note 1408 Designing Power Over Ethernet Using LM5070 and DP83865 1072 Kbytes 10-Jan-06 Download
AN-1408 (Chinese): Application Note 1408 Designing Power Over Ethernet Using LM5070 and DP83865
 697 Kbytes  
AN-1346: Application Note 1346 LM5070 'HE' Evaluation Board 550 Kbytes 13-Mar-06 Download
AN-1346 (Chinese): Application Note 1346 LM5070 'HE' Evaluation Board
 399 Kbytes  

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[Information as of 10-Oct-2008]