Date: 14/05/2010

Single port IEEE 802.3af/at-compliant PSE

Maxim has introduced the MAX5971A, single-port IEEE 802.3af/at-compliant power-sourcing equipment (PSE) controller. This device integrates a 0.5ohms power MOSFET and sense resistor to save space and cost, while delivering up to 40W/port for powered devices (PDs) such as IP phones, IP cameras, wireless LAN access points, and video surveillance cameras. This chip is fully compliant with the IEEE 802.3af and IEEE 802.3at standards. The device operates from 32V to 60V and provides IEEE 802.3af/at-compliant PD discovery, classification, and DC/AC load-disconnect detection. Class 5 and two-event classification are supported for detection and classification of high-power PDs. It is also capable of detecting legacy (noncompliant) PDs that use high capacitance.

The MAX5971A operates autonomously without the need for host processor intervention or software, thus saving processor overhead. Other features include: input undervoltage-lockout (UVLO) detection, input overvoltage detection, an LED-status indicator, overtemperature protection, and output voltage slew-rate limiting during startup.

Package: 28-pin TQFN.

Price: start at US$2.52.

Availability: Now