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LM5071

ACTIVE

Class 3 PoE PD with flyback DC-DC controller & 12V-57V Adapter Priority

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Data sheet

LM5071

ACTIVE
Data sheet Order now

Product details

PoE standards supported 802.3at Type 1 (802.3af) PD power level 13W DC/DC control PD and DC/DC Vin (max) (V) 60 Vin (min) (V) 1.8 PoE current limit (min) (mA) 390 PoE inrush limit (mA) (typ) (A) 0.1, 100 rDS(on) per FET (typ) (mΩ) 1000 Features Error Amplifier, Error amplifier, Primary Side Adapter Priority, Primary-side adapter priority, Programmable UVLO, Thermal shutdown Fault response Thermal Cycling Operating temperature range (°C) -40 to 125 Rating Catalog
PoE standards supported 802.3at Type 1 (802.3af) PD power level 13W DC/DC control PD and DC/DC Vin (max) (V) 60 Vin (min) (V) 1.8 PoE current limit (min) (mA) 390 PoE inrush limit (mA) (typ) (A) 0.1, 100 rDS(on) per FET (typ) (mΩ) 1000 Features Error Amplifier, Error amplifier, Primary Side Adapter Priority, Primary-side adapter priority, Programmable UVLO, Thermal shutdown Fault response Thermal Cycling Operating temperature range (°C) -40 to 125 Rating Catalog
TSSOP (PW) 16 32 mm² 5 x 6.4
  • Compatible with 12V AC Adapters
  • Fully Compliant 802.3af Power Interface Port
  • 80V, 1Ω, 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)

Package

  • TSSOP-16

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  • Compatible with 12V AC Adapters
  • Fully Compliant 802.3af Power Interface Port
  • 80V, 1Ω, 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)

Package

  • TSSOP-16

All trademarks are the property of their respective owners.

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.

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.
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TPS23753A ACTIVE IEEE 802.3-2005 PoE interface and Isolated Converter controller with Enhanced ESD Ride-Through This product integrates the PD & PWM controller and provides more robust protection from unexpected voltage transients (rated to 100V).

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Type Title Date
* Data sheet LM5071 Power Over Ethernet PD Controller with Auxiliary Power Interface datasheet (Rev. E) 29 Mar 2013
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
EVM User's guide AN-1430 LM5071 Evaluation Board (Rev. B) 06 May 2013

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