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Administración de potencia
Circuitos integrados de alimentación a través de Ethernet (PoE)
Dispositivos alimentados

LM5072

ACTIVO

PD de PoE no estándar de Clase 4 con controlador DC-DC de retorno y prioridad de adaptador de 12 V-5

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LM5072

ACTIVO
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Detalles del producto

PoE standards supported 802.3at Type 1 (802.3af) PD power level 25W DC/DC control PD and DC/DC Vin (max) (V) 70 Vin (min) (V) 9 PoE current limit (min) (mA) 800 PoE inrush limit (mA) (typ) (A) Programmable rDS(on) per FET (typ) (mΩ) 700 Features Error amplifier, Primary-side adapter priority, 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 25W DC/DC control PD and DC/DC Vin (max) (V) 70 Vin (min) (V) 9 PoE current limit (min) (mA) 800 PoE inrush limit (mA) (typ) (A) Programmable rDS(on) per FET (typ) (mΩ) 700 Features Error amplifier, Primary-side adapter priority, Thermal shutdown Fault response Thermal Cycling Operating temperature range (°C) -40 to 125 Rating Catalog
HTSSOP (PWP) 16 32 mm² (5 mm × 6.4 mm)
  • PD Interface
    • 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
  • PWM Controller
    • 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)

Package

  • TSSOP-16 EP (Exposed Pad)

All trademarks are the property of their respective owners.

  • PD Interface
    • 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
  • PWM Controller
    • 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)

Package

  • TSSOP-16 EP (Exposed Pad)

All trademarks are the property of their respective owners.

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).

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).
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LM5072 Integrated 100V Pwr Over Ethernet PD Interface & PWM Cntrl w/Aux Support datasheet (Rev. D) 29/03/2013
Guía de selección Power Management Guide 2018 (Rev. R) 25/06/2018
Guía del usuario AN-1521 POEPHYTEREV-I / -E User Guide (Rev. C) 26/04/2013
Guía del usuario LM5072 5V out 25W IEEE 802.3at Compliant POE+ PD Power Ref Design User Guide 27/01/2012
Guía del usuario LM5072 12Vout 25W PoE PD Power Eval-Board for IP Camera User Guide 27/01/2012

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