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Quad, IEEE 802.3at/af PSE Controller for Power-over-Ethernet

Lowest Power Loss with System Power Management Enables High-Power Applications Beyond IEEE 802.3af/at Standards

Product Details

Key Features

Parametric specs for Power Sourcing Equipment
Compliance IEEE 802.3af
IEEE 802.3at
High Power Mode Yes
# Channels 4
Port Current Readout I2C
Load Disconnect DC
Program-
mability
I2C
Package/Pins TQFN/32
Oper. Temp. (°C) -40 to +105
Budgetary
Price (See Notes)
6.68
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Parameters

Parametric specs for Power Sourcing Equipment
Compliance IEEE 802.3af
IEEE 802.3at
High Power Mode Yes
# Channels 4
Port Current Readout I2C
Load Disconnect DC
Program-
mability
I2C
Package/Pins TQFN/32
Oper. Temp. (°C) -40 to +105
Budgetary
Price (See Notes)
6.68

Key Features

  • IEEE 802.3at/af Compliant
  • 0.25Ω Current-Sensing Resistor
  • Up to 70W per Port for PSE Applications
  • 9-Bit Port Current and Voltage Monitoring
  • I²C-Compatible, 3-Wire Serial Interface
  • Supports Single-Supply Operation
  • High-Capacitance Detection for Legacy Devices
  • Supports DC Load-Removal Detections
  • Space-Saving, 32-Pin TQFN (5mm x 5mm) Power Package

Applications/Uses

  • Midspan Power Injectors
  • Power-Sourcing Equipment (PSE)
  • PSE-ICM
  • Switches/Routers

Description

The MAX5980 is a quad, power-sourcing equipment (PSE) power controller designed for use in IEEE® 802.3at/af-compliant PSE. This device provides powered device (PD) discovery, classification, current limit, and load disconnect detection. The device supports both fully automatic operation and software programmability. The device also supports new 2-event classification and Class 5 for detection and classification of high-power PDs. The device supports single-supply operation, provides up to 70W to each port (Class 5 enabled), and still provides high-capacitance detection for legacy PDs.

The device features an I²C-compatible, 3-wire serial interface, and is fully software configurable and programmable. The device provides instantaneous readout of port current and voltage through the I²C interface. The device's extensive programmability enhances system flexibility, enables field diagnosis, and allows for uses in other, nonstandard applications.

The device is available in a space-saving, 32-pin TQFN (5mm x 5mm) power package and is rated for the automotive (-40°C to +105°C) temperature range.

Simplified Block Diagram

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .