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LM5072

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具有反激式直流/直流控制器和 12V 至 57V 适配器优先级输入的 4 级非标准 PoE PD

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LM5072

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产品详情

Vin (min) (V) 9 Vin (max) (V) 70 PoE current limit (min) (mA) 800 PoE inrush limit (mA) (typ) (A) Programmable rDS(on) per FET (typ) (mΩ) 700 PoE standards supported 802.3at Type 1 (802.3af) PD power level 25W DC/DC control PD and DC/DC Fault response Thermal Cycling Features Error amplifier, Primary-side adapter priority, Thermal shutdown Operating temperature range (°C) -40 to 125 Rating Catalog
Vin (min) (V) 9 Vin (max) (V) 70 PoE current limit (min) (mA) 800 PoE inrush limit (mA) (typ) (A) Programmable rDS(on) per FET (typ) (mΩ) 700 PoE standards supported 802.3at Type 1 (802.3af) PD power level 25W DC/DC control PD and DC/DC Fault response Thermal Cycling Features Error amplifier, Primary-side adapter priority, Thermal shutdown Operating temperature range (°C) -40 to 125 Rating Catalog
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • 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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类型 标题 下载最新的英语版本 日期
* 数据表 LM5072 Integrated 100V Pwr Over Ethernet PD Interface & PWM Cntrl w/Aux Support 数据表 (Rev. D) 2013年 3月 29日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
EVM 用户指南 AN-1430 LM5071 Evaluation Board (Rev. B) 2013年 5月 6日
EVM 用户指南 AN-1455 LM5072 Evaluation Board (Rev. A) 2013年 5月 6日
用户指南 AN-1521 POEPHYTEREV-I / -E User Guide (Rev. C) 2013年 4月 26日
用户指南 LM5072 12Vout 25W PoE PD Power Eval-Board for IP Camera User Guide 2012年 1月 27日
用户指南 LM5072 5V out 25W IEEE 802.3at Compliant POE+ PD Power Ref Design User Guide 2012年 1月 27日
应用手册 The LM507X Family of PoE Devices: Frequently Asked Questions (FAQs) (cn) 2006年 5月 10日
应用手册 Application Note 1455 LM5072 Evaluation Board (cn) 最新英语版本 (Rev.A) 2006年 3月 29日

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