LM5070 - Integrated Power Over Ethernet PD Interface and PWM Controller from the PowerWise® Family

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

Features
•Fully Compliant 802.3af Power Interface Port
•80V, 1, 400 mA Internal MOSFET
•Programmable Inrush Current Limit
•Detection Resistor Disconnect Function
•Programmable Classification Current
•Programmable Under-voltage Lockout with Programmable Hysteresis
•Thermal Shutdown Protection
•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)
•800 mA Peak Gate Driver

General Description

The LM5070 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. More...


  Typical Application
*click for larger image


Parametric Table     expand
Parametric Table    collapse
Error Flag No
Output Range 1.25V and above
Output Power 13 Watt
Input Min Voltage 1.8 Volt
Input Max Voltage 75 Volt
Frequency Min 50 kHz
Frequency Max 1000 kHz
Reference Accuracy (+/-) 2.0 %
Current Draw with AUX Winding (typ) 0.7 mA
Special Features Fully compliant IEEE 802.3af PD interface, error amplifier for non-isolated designs, leading edge blanking, high current gate drive
On/Off Pin Yes
Error Flag No
Adjustable Output Yes
Output Min 1.25 Volt
Output Range 1.25V and above
Output Power 13 Watt
Adj Switch Frequency Yes
Efficiency (peak) 90.5 %
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
LM5071Compatible With Auxilary Power Sources, Such As 12 V AC Adapters
LM5072Higher Transient Voltages (100V), Supplies More Current (750mA) And Compatible With Auxiliary Power
LM3411Feedback Control / Optocoupler Driver For Isolated Supplies

Additional Resources

Online Seminars 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
LM5070 Integrated Power Over Ethernet PD Interface and PWM Controller 840 Kbytes 4-Apr-06 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
LM5070AE EVALIntegrated Power Over Ethernet PD Interface and PWM ControllerFull productionLM5070_PSPICE_0325.zip
 
Buy Now 		1+$101.001-
8 weeksN/A
LM5070HE EVALIntegrated Power Over Ethernet PD Interface and PWM ControllerFull productionLM5070_PSPICE_0325.zip
 
Buy Now 		1+$120.001-
8 weeksN/A
LM5070MTC-50TSSOP16STD
NOPB		1
1		260
260		RoHS Download Full productionLM5070_PSPICE_0325.zip
Samples
Buy Now 		1K+$1.45rail
of
92		NSUZXYTT
5070M
TC-50
6 weeks500
LM5070MTC-80TSSOP16NOPB1260RoHS Download Full productionLM5070_PSPICE_0325.zip
Samples
Buy Now 		1K+$1.45rail
of
92		NSUZXYTT
5070M
TC-80
6 weeks1000
LM5070MTCX-50TSSOP16STD
NOPB		1
1		260
260		RoHS Download Full productionLM5070_PSPICE_0325.zip
 
Buy Now 		1K+$1.45reel
of
2500		NSUZXYTT
5070M
TC-50
6 weeks10000
LM5070MTCX-80TSSOP16NOPB1260RoHS Download Full productionLM5070_PSPICE_0325.zip
 
Buy Now 		1K+$1.45reel
of
2500		NSUZXYTT
5070M
TC-80
6 weeks5000
LM5070SD-50LLP16NOPB1260RoHS Download Full productionLM5070_PSPICE_0325.zip
Samples
Buy Now 		1K+$1.45reel
of
1000		NS
UZXYTT
L00051B
6 weeks100
LM5070SD-80LLP16NOPB1260RoHS Download Full productionLM5070_PSPICE_0325.zip
Samples
Buy Now 		1K+$1.45reel
of
1000		NS
UZXYTT
L00052B
6 weeks10
LM5070SDX-50LLP16NOPB1260RoHS Download Full productionLM5070_PSPICE_0325.zip
 
Buy Now 		1K+$1.45reel
of
4500		NS
UZXYTT
L00051B
6 weeksN/A
LM5070SDX-80LLP16NOPB1260RoHS Download Full productionLM5070_PSPICE_0325.zip
 
Buy Now 		1K+$1.45reel
of
4500		NS
UZXYTT
L00052B
6 weeksN/A

General Description

The LM5070 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 LM5070 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. Two options are available providing either an 80% maximum duty cycle limit with slope compensation (on the -80 suffix) device or a 50% maximum duty cycle limit and no slope compensation on the (-50 suffix) device.

Design Tools

TitleSize in Kbytes Date Click link below to Download    
LM5070 PSPICE model 286 Kbytes 26-Mar-2009 View Download  

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Reference Designs
•LM5070 Reference Design - Power-over-Ethernet (POE) Regulator, Low-cost, High Efficiency 5V 7W Output
•LM5070 Reference Design - Isolated Power-over-Ethernet (POE) Regulator, Low-cost, High Efficiency 5V 7W Output

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-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  
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-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  

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More Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1875: Application Note 1875 LM5073HE Evaluation Board With Active Bridge 230 Kbytes 2-Jul-08 Download
AN-1574: Application Note 1574 LM5073 Evaluation Board 464 Kbytes 24-Apr-07 Download
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-1430: Application Note 1430 LM5071 Evaluation Board 738 Kbytes 4-Jan-06 Download
AN-1521: Application Note 1521 POEPHYTEREV-I / -E User Guide 14913 Kbytes 4-Apr-08 Download

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[Information as of 3-Jul-2009]