The MAX5944ESE+T from Maxim Integrated is a robust, feature-rich quad Ethernet Power-Sourcing Equipment (PSE) controller designed for use in Power over Ethernet (PoE) applications. This integrated circuit is specifically engineered to facilitate the delivery of power over Ethernet network cables in accordance with the IEEE 802.3af standard. It is an ideal choice for network devices that require a reliable and efficient power supply solution, such as wireless access points, IP cameras, and VoIP phones.

Key Features

• IEEE 802.3af Compliance: The MAX5944ESE+T adheres to the strict specifications of the IEEE 802.3af standard, ensuring compatibility with a wide range of PoE devices.
• Quad-Port Capability: This PSE controller can manage up to four PoE ports simultaneously, making it a cost-effective solution for multi-port applications.
• Integrated Power MOSFETs: Each of the four ports is equipped with internal power MOSFETs, simplifying the design and reducing external component count.
• Detection and Classification: The device performs signature detection and power classification of connected PDs (Powered Devices), ensuring safe and efficient power management.
• Current Limit and Thermal Shutdown: Advanced protection features such as current limit and thermal shutdown are built in to prevent damage to the PSE controller and connected devices.
• Low Power Dissipation: Designed for efficiency, the MAX5944ESE+T minimizes power dissipation, which is crucial for maintaining the temperature within safe operating limits.

Applications

The MAX5944ESE+T is suitable for a variety of PoE applications including:

• Network Switches and Routers
• Wireless Access Points
• IP Surveillance Cameras
• VoIP Phone Systems
• Networked Home Appliances

Technical Specifications

The device comes in a 16-pin narrow SO package and operates over the -40°C to +85°C temperature range. It requires a supply voltage typically ranging from 32V to 57V to accommodate the PoE voltage requirements. The MAX5944ESE+T also features an I²C-compatible serial interface for digital programming and control of the PSE functions.

With its combination of robust protection features, compliance with industry standards, and ease of integration, the MAX5944ESE+T is a top choice for designers looking to incorporate PoE capabilities into their networking products.