MAX5941BESE+

Overview

The MAX5941BESE+ is an IEEE 802.3af-compliant Power-over-Ethernet (PoE) controller designed for powered devices. It integrates a PD interface and a DC-DC PWM controller suitable for flyback and forward converters. The device operates with an input voltage range of 18V to 67V and features current-mode control with leading-edge blanking. It includes a programmable classification signature, integrated isolation MOSFET, and programmable inrush current control. The component functions within a temperature range of -40°C to +85°C and is housed in a 16-SOIC package.

Feature Summary

• Integrates complete IEEE 802.3af-compliant PD interface with detection and classification signatures
• Includes compact DC-DC PWM controller supporting isolated or non-isolated flyback and forward topologies
• Features integrated MOSFET for isolation and inrush current limiting with gate output control
• Provides programmable undervoltage lockout and low leakage current during detection

Applications

• IP Phones
• Wireless Access Nodes
• Security Cameras
• Internet Appliances

Procurement Notes

Verify the specific suffix 'ESE+' against the manufacturer's official part numbering guide to confirm package type and RoHS compliance status. Confirm availability through authorized distributors as this component may be subject to limited supply or obsolescence notices. Ensure the ordering information matches the required operating temperature range and pin configuration for your design.

Selection Notes

Select this component for designs requiring a fully integrated PoE solution that minimizes external component count. It is suitable for applications needing precise inrush current management and low leakage during detection phases. Consider the 16-SOIC package constraints and thermal performance when designing the PCB layout for flyback or forward converter implementations.

Part Context

This part belongs to the MAX5941 family of PoE controllers from Analog Devices/Maxim Integrated. It is specifically engineered for powered devices in Ethernet networks, combining interface logic with power conversion control. The 'B' variant typically denotes extended industrial temperature ranges compared to commercial variants.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative PoE controllers by comparing IEEE 802.3af compliance, input voltage ranges, and package pinouts.