MAX5972A Datasheet | Maxim Integrated

19-4924; Rev 1; 2/10 TION KIT EVALUA BLE A IL A V A .. IEEE 802.3af/at-pliant, Powered Device Interface Controller with Integrated Power MOSFET General Description The MAX5972A provides a plete interface for a powered device (PD) to ply with the IEEE® 802.3af/ at standard in a power-over-Ethernet (Po E) system. The MAX5972A provides the PD with a detection signature, classification signature, and an integrated isolation power switch with inrush current control. During the inrush period, the MAX5972A limits the current to less than 180m A before switching to the higher current limit (720m A to 880m A) when the isolation power MOSFET is fully enhanced. The device Features an input UVLO with wide hysteresis and long deglitch time to pensate for twisted-pair cable resistive drop and to assure glitch-free transition during power-on/-off conditions. The MAX5972A can withstand up to 100V at the input. The MAX5972A supports a 2-event classification method as specified in the IEEE 802.3at standard and provides a signal to indicate when probed by Type 2 power-sourcing equipment (PSE). The device detects the presence of a wall adapter power-source connection and allows a smooth switch over from the Po E power source to the wall power adapter. The MAX5972A also provides a power-good (PG) signal, two-step current limit and foldback, overtemperature protection, and di/dt limit. The MAX5972A is available in a 16-pin, 5mm x 5mm, TQFN power package. This device is rated over the -40NC to +85NC extended temperature range. S IEEE 802.3af/at pliant S 2-Event Classification or an External Wall Adapter Indicator Output S Simplified Wall Adapter Interface S Po E Classification 0 to 5 S 100V Input...