MAX5941AESE+

Overview

The MAX5941AESE+ is an IEEE 802.3af-compliant Powered Device (PD) interface and current-mode PWM controller designed for Power over Ethernet applications. It operates within a supply voltage range of 18V to 67V and supports a maximum power output of 12.95W. The component functions as a single-channel controller without internal switches, utilizing external MOSFETs for power handling. It is housed in a 16-SOIC package with a width of 3.90mm and is rated for operation across a temperature range of 0°C to 70°C.

Feature Summary

• Complies with IEEE 802.3af standards for Powered Device classification and control
• Integrates current-mode PWM control for precise power management
• Supports hot-swap capabilities to handle input transients during connection

Applications

• IEEE 802.3af compliant Powered Devices
• Power-over-Ethernet interface circuits
• Telecommunications equipment requiring PoE power

Procurement Notes

Verify the specific suffix designation to confirm package type and tape/reel configuration, as variations exist between tube and reel packaging. Confirm RoHS compliance status through official documentation, as manufacturing updates may affect environmental certifications. Check for obsolescence notices or product change notifications prior to procurement, as this component family has undergone lifecycle changes.

Selection Notes

Select this component when designing systems requiring strict adherence to IEEE 802.3af Powered Device protocols. Ensure the external MOSFET selection matches the current requirements, as the controller lacks internal switching elements. Verify that the operating voltage range aligns with the available PoE power source specifications. Consider thermal management strategies given the 12.95W maximum power capability in the SOIC-16 package.

Part Context

This part belongs to the MAX5941 series of PoE controllers manufactured by Maxim Integrated, now part of Analog Devices Inc. The series includes variants such as MAX5941ACSE+ and MAX5941B, which share similar functional architectures but may differ in specific electrical characteristics or pin configurations. The MAX5941AESE+ specifically targets Powered Device applications rather than PSE interfaces.

Replacement Considerations

Public confirmed substitute part numbers are not explicitly documented in the provided source material. Designers should consult official manufacturer cross-reference guides or engineering bulletins for validated alternatives. Generic replacements may require circuit redesign due to differences in control algorithms or pinout compatibility.