LM5070   
Integrated Power Over Ethernet PD Interface and PWM Controller from the PowerWise® Family		 Click link to Download

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

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.
Also Recommended
LM5071▲Compatible With Auxilary Power Sources, Such As 12 V AC Adapters
LM5072▲Higher Transient Voltages (100V), Supplies More Current (750mA) And Compatible With Auxiliary Power
LM3411Feedback Control / Optocoupler Driver For Isolated Supplies



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Typical Application
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Block Diagram
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Typical Performance
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Paramaters / ValuesLM5070 LM5071 LM5072
Input Min Voltage1.8 Volt 9.5 Volt 9 Volt
Input Max Voltage75 Volt 60 Volt 100 Volt
Frequency Min50 kHz 50 kHz 50 kHz
Frequency Max1000 kHz 1000 kHz 1000 kHz
Reference Accuracy (+/-)2.0 % 2 % 2 %
Current Draw with AUX Winding (typ)0.7 mA 0.7 mA 0.7 mA
Special FeaturesFully compliant IEEE 802.3af PD interface, error amplifier for non-isolated designs, leading edge blanking, high current gate drive Auxiliary power interface, 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
Error FlagNo Yes Yes
Adjustable OutputYes Yes Yes
Output Min1.25 Volt 1.25 Volt 1.25 Volt
Output Range1.25V and above 1.25 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 Switching Controller Switching Controller
Temperature Min-40 deg C -40 deg C -40 deg C
Temperature Max125 deg C 125 deg C 125 deg C
PowerWiseYes Yes Yes

Datasheet
TitleSizeDateOther
Language
LM5070 Integrated Power Over Ethernet PD Interface and PWM Controller840
Kbytes		4-Apr-06 


Featured Application Notes
TitleSizeDateOther
Language
AN-1358: Application Note 1358 LM5070 'AE' Evaluation Board787
Kbytes		27-Jan-05 
AN-1346: Application Note 1346 LM5070 'HE' Evaluation Board550
Kbytes		13-Mar-06 中文
AN-1408: Application Note 1408 Designing Power Over Ethernet Using LM5070 and DP838651072
Kbytes		10-Jan-06 中文
AN-1474: Application Note 1474 The LM507X Family of PoE Devices: Frequently Asked Questions (FAQs)457
Kbytes		10-May-06 中文


More Application Notes
TitleSizeDateOther
Language
AN-1875: Application Note 1875 LM5073HE Evaluation Board With Active Bridge230
Kbytes		2-Jul-08 
AN-1574: Application Note 1574 LM5073 Evaluation Board464
Kbytes		24-Apr-07 
AN-1455: Application Note 1455 LM5072 Evaluation Board708
Kbytes		30-Mar-06 中文
AN-1430: Application Note 1430 LM5071 Evaluation Board738
Kbytes		4-Jan-06 
AN-1521: Application Note 1521 POEPHYTEREV-I / -E User Guide14913
Kbytes		4-Apr-08 

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM5070MTC-50/NOPB
LM5070MTC-50

RoHS



TSSOP		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide10
AVNET-EMWorldwide276
DIGIKEYWorldwide0
FARNELLEurope and Asia268
FUTUREWorldwide1100
NEWARKAmericas380
$1.45 each at 1K+ pcsrail
of
92
LM5070MTC-80/NOPB

RoHS



TSSOP		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide66
DIGIKEYWorldwide597
FARNELLEurope and Asia15
FUTUREWorldwide36
NEWARKAmericas75
$1.45 each at 1K+ pcsrail
of
92
LM5070MTCX-50/NOPB
LM5070MTCX-50

RoHS



TSSOP		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
TECHMOSAAsia Pacific2500
$1.45 each at 1K+ pcsreel
of
2500
LM5070MTCX-80/NOPB

RoHS



TSSOP		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.45 each at 1K+ pcsreel
of
2500
LM5070SD-50/NOPB

RoHS



LLP		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1777
$1.45 each at 1K+ pcsreel
of
1000
LM5070SD-80/NOPB

RoHS



LLP		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide0
$1.45 each at 1K+ pcsreel
of
1000
LM5070SDX-50/NOPB

RoHS



LLP		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.45 each at 1K+ pcsreel
of
4500
LM5070SDX-80/NOPB

RoHS



LLP		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.45 each at 1K+ pcsreel
of
4500

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM5070AE EVAL
Integrated Power Over Ethernet PD Interface and PWM ControllerFull production
Lead Free (RoHS)

 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide49
$101.00 each1

LM5070 Integrated Power Over Ethernet PD Interface and PWM Controller

Features:

  • Fully compliant 802.3af Power Interface Port
  • 80V 1Ω, 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 Applicatins
  • 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

Contents:

  • A fully assembled LM5070AE evaluation board
  • LM5070 datasheet
  • LM5070 eval board appnote

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM5070HE EVAL
Integrated Power Over Ethernet PD Interface and PWM ControllerFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide19
$120.00 each1

LM5070 Integrated Power Over Ethernet PD Interface and PWM Controller

Features:

  • Fully Compliant 802.3af Power Interface Port
  • 80V 1Ω, 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 Applicatins
  • 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

Contents:

  • A fully assembled LM5070 evaluation board
  • LM5070 datasheet
  • LM5070 eval board appnote

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM5070MTC-50ABCD150XV1038680025950002736338335
LM5070MTC-80ABCD150XV1038680025950002736338335
LM5070MTCX-50ABCD150XV1038680025950002736338335
LM5070MTCX-80ABCD150XV1038680025950002736338335
LM5070SD-50ABCD150XV1038680025950002736338335
LM5070SD-80ABCD150XV1038680025950002736338335
LM5070SDX-50ABCD150XV1038680025950002736338335
LM5070SDX-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.


[Information as of 20-Nov-2009]