electronics engineering Herald                                          
Home | News | New Products | India Specific | Design Guide | Sourcing database | Student Section | About us | Contact us | What's New
Processor / MCU / DSP
Memory
Analog
Logic and Interface
PLD / FPGA
Power-supply and Industrial ICs
Automotive ICs
Cellphone ICs
Consumer ICs
Computer ICs
Communication ICs (Data & Analog)
RF / Microwave
Subsystems / Boards
Reference Design
Software / Development kits
Test and Measurement
Discrete
Opto
Passives
Interconnect
Sensors
Batteries
Others

Date: 30th July 2010

IEEE 802.3af/at-compliant single port PSE controller from Maxim for POE applications

Maxim has unveiled the MAX5971B, a single-port power-sourcing equipment (PSE) controller for IEEE 802.3af/at-compliant, high-power power-over-Ethernet (PoE+) applications. This device integrates a 0.5O power MOSFET, sense resistor, and current monitor. The typical application circuit requires less than eight external components. The MAX5971B includes a 9-bit ADC and I²C interface to enable power management and power budgeting. Maxim says that this device is capable of delivering up to 40W/port for PoE+ powered devices (PDs) and is suggested for IP phones, IP cameras, wireless LAN access points, and video surveillance cameras.

This PSE controller is fully compliant to the IEEE 802.3af and IEEE 802.3at standards. This device has an operating voltage range of 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. The MAX5971B also detects legacy (noncompliant) PDs that use high capacitance as the discovery signature.

The MAX5971B can be controlled with a system microcontroller through the I2C interface and also it can be configured to operate autonomously without the need for a host microcontroller or software.

Other device features include input undervoltage-lockout (UVLO) detection, input overvoltage detection, LED-status indication, overtemperature protection, and output voltage slew-rate limiting during startup.

Package: 28-pin TQFN

Operating temperature range: -40°C to +85°C

Price: starts at US$3.15

Availability: Now

For more information visit: www.maxim-ic.com.

 
Home | News | New Products | India Specific | Design Guide | Sourcing database | Student Section | About us | Contact us | What's New
©2006 Electronics Engineering Herald