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Monolithic Power Systems (MPS) MP8020 Power Over Ethernet Powered Device is an IEEE 802.3af/at/bt compliant, Power over Ethernet (PoE) powered device (PD). The device supports all the functions of IEEE 802.3af/at/bt, including detection, 5-event classification, input current (IIN) control, and an internal 100V hot-swap MOSFET.
The MP8020 provides configurable inrush current limiting during start-up and operation current limiting when the internal MOSFET is fully turned on. The GATE1 driver supports the use of an external low on-resistance (RDS(ON)) MOSFET for high-power design. A high-power good (PG) signal enables the use of a downstream DC/DC converter. The MP8020 also provides automatic maintain power signature functionality under light loads.
An auxiliary power input detector (AUX) and GATE2 driver provide a smooth power switch from the power-sourcing equipment (PSE) to an auxiliary wall adapter with low power loss. The MP8020 also features a built-in detection resistor, thermal protection, and a wide input under-voltage lockout (UVLO) hysteresis. The Monolithic Power Systems (MPS) MP8020 is available in a QFN-18 (3mmx5mm) package.
