MP8020中文資料美國芯源數(shù)據(jù)手冊PDF規(guī)格書

DESCRIPTION

The MP8020 is an IEEE 802.3af/at/btcompliant,

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 MP8020 is available in a QFN-18

(3mmx5mm) package.

FEATURES

? Compliant with 802.3af/at/bt Specifications

? Internal Detection Resistor

? Supports Up to 71.3W Powered Device

(PD) Operation

? Internal Hot-Swap MOSFET for ≤51W

Design

? External MOSFET with GATE1 for >51W

Design

? Auxiliary Power Supply from >8.8V Adapter

? GATE2 N-Channel MOSFET Driver for

Adapter Supply

? Configurable Current Limit

? Automatic Maintain Power Signature

? PG and Allocated Power Type Indicators

? 150°C Over-Temperature Protection (OTP)

? Available in a QFN-18 (3mmx5mm)

Package

APPLICATIONS

? IEEE 802.3 af/at/bt-Compliant Devices

? Security Cameras

? Video and VoIP Phones

? WLAN Access Points

? Internet of Things (IoT) Devices

? Pico Base Stations