ADI LTC4263IDE#TRPBF

控制器（PSE）15.4 W802.3af（PoE）

Overview

The LTC4263IDE is an autonomous single-channel PSE controller for use in IEEE 802.3af compliant Power over Ethernet systems. It includes an on-board power MOSFET, internal inrush, current limit, and short-circuit control, IEEE 802.3af compliant PD detection and classification circuitry, and selectable AC or DC disconnect sensing. On-board control algorithms provide complete IEEE 802.3af compliant operation without the need of a microcontroller. The LTC4263IDE simplifies PSE implementation, needing only a single 48V supply and a small number of passive support components.

The LTC4263IDE is available in 14-pin 4mm × 3mm DFN and 14-pin SO packages.

Features

IEEE 802®.3af Compliant

Operation from a Single 48V Supply

Fully Autonomous Operation without Microcontroller

Internal MOSFET with Thermal Protection

Power Management Works Across Multiple Ports with Simple RC Network

Precision Inrush Control with Internal Sense Resistor

Powered Device (PD) Detection and Classification

AC and DC Disconnect Sensing

Robust Short-Circuit Protection

Pin-Selectable Detection Backoff for Midspan PSEs

Classification Dependent ICUT Current Threshold

LED Driver Indicates Port On and Blinks Status Codes

Available in 14-Pin SO and 4mm × 3mm DFN Packages

Applications

IEEE 802.3af Compliant Endpoint/Midspan PSEs

Single-Port or Multi-Port Power Injectors

Power Forwarders

Low-Port Count PSEs

Environment B PSEs

Standalone PSEs