Part Details for MAX5945 by Maxim Integrated Products
Overview of MAX5945 by Maxim Integrated Products
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Part Details for MAX5945
MAX5945 CAD Models
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Reference Designs related to MAX5945
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Reference Design for Power-over-Ethernet (PoE) Midspan or Endpoint Insertion
This application note presents a reference design for Power-over-Ethernet (PoE) midspan or endpoint insertion. The reference design powers 4 to 192 Ethernet ports, and can be used in stand-alone mode or configured by a system-level microcontroller. Links to firmware and various support documents are provided.
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Low-Cost, Complete Power Solution for Powered Devices Includes a 12V Buck Converter
The MAX5953A provides a simple and inexpensive, yet complete, nonisolated power solution for a powered device (PD) in a Power-over-Ethernet (PoE) system. The circuit provides the PD with detection and classification signatures in compliance with the IEEESM 802.3af standard, plus programmable inrush-current control, an integrated power switch, a PWM controller, and integrated high- and low-side switches. The buck step-down converter is capable of > 80% conversion efficiency while delivering 12V at 0.85A.
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Evaluating a Quad Network Power-Sourcing Equipment (PSE) Controller
The MAX5945 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board featuring an Ethernet four-port network power controller circuit for -48V supply rail systems. The MAX5945 IEEE® 802.3af-compliant network power controller is available in a 36-pin SSOP package. The circuit includes four n-channel power MOSFETs used to form the main power-sourcing equipment (PSE) circuit on the EV kit. The MAX5945 is used in power-over-ethernet (POE) applications requiring DC power over four Ethernet network ports. The EV kit provides optical isolation for the I2C-compliant 3-wire interface. The isolated interface connects to a PC parallel port (LPT) through a MAXSMBus interface board. The EV kit can easily be reconfigured for interfacing to a user’s stand-alone microcontroller for isolated or nonisolated operation.