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MAX5971B

Maxim Integrated Products
Part Number MAX5971B
Manufacturer Maxim Integrated Products
Description PSE Controller
Published Aug 25, 2010
Detailed Description www.DataSheet4U.com 19-5336; Rev 0; 6/10 TION KIT EVALUA BLE IL AVA A Single-Port, 40W, IEEE 802.3af/at, PSE Controll...
Datasheet PDF File MAX5971B PDF File

MAX5971B
MAX5971B

Overview
www.
DataSheet4U.
com 19-5336; Rev 0; 6/10 TION KIT EVALUA BLE IL AVA A Single-Port, 40W, IEEE 802.
3af/at, PSE Controller with I2C Features S IEEE 802.
3af/at Compliant S Up to 40W for Single-Port PSE Applications S Integrated Power MOSFET and Sense Resistor S Supports 54V Single-Supply Operation S PD Detection and Classification S I2C-Compatible, 2-Wire Serial Interface S Instantaneous Readout of Port Current Through I2C Interface 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) Power Package General Description The MAX5971B is a single-port power controller designed for use in IEEEM 802.
3af/at-compliant power-sourcing equipment (PSE).
This device provides powered device (PD) discovery, classification, current limit, and DC and AC load-disconnect detections.
The MAX5971B supports both fully automatic operation and software programmability, and features an integrated power MOSFET and sense resistor.
The device supports detection and classification operation from a single 54V supply.
In addition, it supports 2-event classification and new Class 5 classification of high-power PDs.
The MAX5971B provides up to 40W to a single port (Class 5 enabled) and still provides high-capacitance detection for legacy PDs.
The device provides four operating modes to suit different system requirements.
By default, auto mode allows the device to operate automatically at its default settings without any software.
Semiautomatic mode automatically detects and classifies a device connected to the port after initial software activation, but does not power the port until instructed to by software.
Manual mode allows total software control of the device and is useful for system diagnostics.
Shutdown mode terminates ...


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