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MP8020

802.3af/at/bt Compliant PoE Powered Device Interface

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Powered Device
MP8020

MP8020

802.3af/at/bt Compliant PoE Powered Device Interface

Description

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.

Features & Benefits

802.3af/at/bt Compliant
Internal Detection Resistor
Supports Up to 71.3W PD Operation
Internal Hot-Swap MOSFET for ≤51W Applications
External MOSFET and Gate Driver (GATE1) for >51W Applications
Auxiliary Power Supply from >8.8V Adapter
GATE2 N-Channel MOSFET Driver for Adapter Supply
Configurable Current Limit
Automatic Maintain Power Signature (MPS)
PG and Allocated Power Type Indicators
Thermal Shutdown (150°C)
Available in a QFN-18 (3mmx5mm) Package

Active Part Numbers:

MP8020GQV-Z

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