Analog Devices MAX5982A / MAX5982B / MAX5982C 70W PoE Powered Device Interface Controllers with integrated MOSFET provide a complete interface for a powered device (PD) to comply with the IEEE 802.3af/at standard in a power-over-Ethernet (PoE) system. These controllers provide the PD with a detection signature, classification signature, and an integrated isolation power switch with inrush current control. During the inrush period, these devices limit the current to less than 182mA before switching to the higher current limit (1700mA to 2100mA) when the isolation power MOSFET is fully enhanced.
