Maxim Integrated MAX5945CAX+ Product Overview

The MAX5945CAX+ is a robust, quad, IEEE 802.3af-compliant Power-over-Ethernet (PoE) power-sourcing equipment (PSE) controller designed by Maxim Integrated to facilitate the delivery of DC power along with data over Ethernet cables. This high-performance integrated circuit is engineered to simplify the implementation of PoE in a wide range of applications such as IP phones, wireless access points, network cameras, and other powered devices (PDs).

Encased in a compact 36-pin SSOP package, the MAX5945CAX+ provides a complete PSE solution that integrates the necessary control functions to meet the IEEE 802.3af standard. It features an advanced auto-classification mechanism that accurately detects the class of connected PDs, ensuring optimal power management and efficiency. Additionally, the device supports per-port current limiting, overcurrent protection, and thermal shutdown, which are critical for maintaining the safety and reliability of the power network.

The MAX5945CAX+ is designed for flexibility, offering programmable under-voltage lockout (UVLO), I<sub>LIM setting, and operating modes. This allows for customization to specific system requirements and compatibility with various network architectures. The controller also facilitates remote power management by enabling powered device discovery, classification, and disconnect detection through signature resistance sensing.

Key features of the MAX5945CAX+ include:

• Quad independent PSE channels compliant with IEEE 802.3af
• Auto-classification of PDs with two-event classification support
• Programmable current limit and UVLO settings
• Integrated power MOSFETs for each channel
• Per-port power-on reset (POR) and fault reporting
• Robust protection features including overcurrent and thermal shutdown

The MAX5945CAX+ is ideal for network administrators and system designers looking to implement PoE capabilities with high reliability and advanced control. It is a testament to Maxim Integrated's commitment to developing innovative solutions that power the increasingly connected world.