MAX5971AETI+T 热交换电压控制器

MAX5971AETI+T

Single-Port, 40W, IEEE 802.3af/at PSE  Controller with Integrated MOSFET 热交换电压控制器

General Description

The MAX5971AETI+T MAX5971A is a single-port, power-sourcing equipment (PSE) power controller designed for use in IEEE® 802.3af/at-compliant PSE. This device provides powered device (PD) discovery, classification, current limit, and DC and AC load-disconnect detections. The MAX5971A operates automatically without the need for any software programming and features an integrated power MOSFET and sense resistor. The device also supports new Class 5 and 2-event classification for detection and classification of high-power PDs. The MAX5971A provides up to 40W to a single port (Class 5 enabled) and still provides highcapacitance detection for legacy PDs.

Features MAX5971AETI+T

S IEEE 802.3af/at Compliant

S Up to 40W for Single-Port PSE Applications

S Integrated 0.5I Power MOSFET and Sense Resistor

S PD Detection and Classification

S Programmable Current Limit for Class 5 PDs

S High-Capacitance Detection for Legacy Devices

S Supports Both DC and AC Load Removal Detections

S Current Foldback and Duty Cycle-Controlled Current Limit

S LED Indicator for Port Status

S Direct Fast-Shutdown Control Capability

S Space-Saving, 28-Pin TQFN (5mm x 5mm) Package

Applications MAX5971AETI+T

Single-Port PSE End-Point Applications

Single-Port PSE Power Injectors (Midspan Applications)

Switches/Routers

Industrial Automation Equipment

Wireless LAN Access Point/WiMAX™ Base

Station