MP8020

The MP8020 is an IEEE 802.3af/at/bt compatible, power-over-Ethernet (PoE) powered device (PD) interface. The PD interface offers all IEEE 802.3af/at/bt functionality, including detection, five-event classification, and input current control. It also has an internal 100V hot-swap MOSFET.

The device features a configurable inrush current limit and an operation current limit for start-up and normal operation. The gate driver (GATE1) supports the external, low R_DS(ON) MOSFET to improve efficiency under heavy-load conditions. A power good (PG) signal enables the downstream DC/DC converter for PoE power regulation. The MP8020 also provides automatic maintain power signature (MPS) functionality for light-load operations. 

An auxiliary power input detector (AUX) and the second gate driver (GATE2) provide a smooth power switch from the PSE to an auxiliary wall adapter with low power loss. Full protection features include an integrated detection resistor, thermal protection, and a wide input under-voltage lockout (UVLO) hysteresis. The MP8020 is available in a QFN-18 (3mmx5mm) package.