MAX5981B Datasheet | Maxim Integrated

MAX5981A/MAX5981B 19-5732; Rev 2; 8/11 IEEE 802.3af/at-pliant, Powered Device Interface Controllers with Integrated Power MOSFET General Description The MAX5981 provides a ­plete interface for a powered device (PD) to ply with the IEEE® 802.3af/at standard in a power-over-ethernet (PoE) system. The MAX5981 provides the PD with a detection signature, classifica­tion signature, and an integrated isolation power switch with inrush current control. During the inrush period, the MAX5981 limits the current to less than 180mA before switching to the higher curr­ent limit (720mA to 880mA) when the isolation power MOSFET is fully enhanced. The device Features an input UVLO with wide...