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LM5070 -
Integrated Power Over Ethernet PD Interface and PWM Controller from the PowerWise® Family
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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...
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Typical Application
*click for larger image
| Parameters | Values |
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| 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 |
Typical Performance
click for larger image
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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 |
| LM3411 | Feedback Control / Optocoupler Driver For Isolated Supplies |
Additional Resources
Online Seminars
Design Tools
Application Notes
Block Diagram
*click for larger image
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Datasheet
Package Availability, Models, Samples & Pricing
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.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
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LM5070MTC-50 | ABCD150XV1 | 0 | 3868 | 0 | 0 | 2595000 | 2 | 736338335
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LM5070MTC-80 | ABCD150XV1 | 0 | 3868 | 0 | 0 | 2595000 | 2 | 736338335
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LM5070MTCX-50 | ABCD150XV1 | 0 | 3868 | 0 | 0 | 2595000 | 2 | 736338335
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LM5070MTCX-80 | ABCD150XV1 | 0 | 3868 | 0 | 0 | 2595000 | 2 | 736338335
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LM5070SD-50 | ABCD150XV1 | 0 | 3868 | 0 | 0 | 2595000 | 2 | 736338335
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LM5070SD-80 | ABCD150XV1 | 0 | 3868 | 0 | 0 | 2595000 | 2 | 736338335
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LM5070SDX-50 | ABCD150XV1 | 0 | 3868 | 0 | 0 | 2595000 | 2 | 736338335
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LM5070SDX-80 | ABCD150XV1 | 0 | 3868 | 0 | 0 | 2595000 | 2 | 736338335
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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.
Design Tools
| Title | Size in Kbytes |
Date |
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| LM5070 PSPICE model |
286 Kbytes |
26-Mar-2009 |
View |
Download |
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Reference Designs
Application Notes
| Title | Size in Kbytes |
Date |
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| 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
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399 Kbytes |
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| 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
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697 Kbytes |
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| 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)
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388 Kbytes |
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More Application Notes
| Title | Size in Kbytes |
Date |
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| 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
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600 Kbytes |
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| 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 |
[Information as of 7-Nov-2009]
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RoHS Compliance Information
