802.3af/at-compliant PSE controller delivers 40 W
The MAX5971B is a single-port PSE controller for IEEE 802.3af/at-compliant high-power PoE+ applications. The device integrates a 0.5-Ω power MOSFET, sense resistor, and current monitor for PSE systems. The device also includes a 9-bit ADC and I2 C interface to enable advanced power management and power budgeting. It delivers up to 40 W/port for PoE+-powered devices and suits IP phones, IP cameras, wireless LAN access points, and video surveillance cameras. Typical application circuits require fewer than eight external components.
This PSE controller operates from 32 to 60 V 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. The device also detects legacy (noncompliant) PDs that use high capacitance as the discovery signature. It can be controlled with a system microcontroller (such as the MAXQ2000), can be configured to operate autonomously without the need for a host microcontroller or software, or it can be configured to operate in manual or semiautomatic modes. It offers input UVLO detection, input overvoltage detection, LED-status indication, overtemperature protection, and output-voltage slew-rate limiting during startup. (From $3.15 ea/1,000 — available now.)
Maxim Integrated Products , Sunnyvale , CA
Customer Service 800-998-8800
Advertisement
Learn more about Maxim Integrated
