LM5073

LM5073 100V Power Over Ethernet PD Interface with Aux Support March 2007 LM5073 100V Power Over Ethernet PD Interface with Aux Support General Description The LM5073 Powered Device (PD) interface provides a high performance solution that is fully compliant to IEEE 802.3af for a PD connecting into Power over Ethernet (PoE) networks. The LM5073 provides the flexibility for the PD to also accept power from unregulated auxiliary sources such as AC adapters and solar cells in a variety of configurations. The low RDS(ON) PD interface hot swap MOSFET and programmable DC current limit extend the range of LM5073 applications up to twice the power level of IEEE 802.3af compliant devices. The 100V maximum voltage rating simplifies selection of the transient voltage suppressor that protects the PD from network transients. Control outputs for a separate DC-DC converter are provided to allow freedom to select the best DC-DC converter topology for the particular application. ■ ■ ■ ■ ■ ■ ■ ■ ■ Programmable DC Current Limit up to 800 mA 100V, 0.7Ω Hot Swap MOSFET Integrated PD Signature Resistor Integrated PoE Input UVLO Inrush Current Limit PD Classification Capability Thermal Shutdown Protection Line Over Voltage Protection Complementary Open Drain Outputs for Controlling a DCDC Converter ■ Power Good Indicator Applications ■ IEEE 802.3af Compliant PoE Powered Devices ■ Non-Compliant, Application Specific Devices ■ Higher Power Ethernet Powered Devices Features PD Interface ■ Fully Co...