Product Overview: LTC4266AIUHF-4

The LTC4266AIUHF-4 is a robust, high-performance quad Power over Ethernet (PoE) controller designed by Linear Technology, now part of Analog Devices. This advanced component is engineered to facilitate the delivery of power over Ethernet cabling to powered devices (PDs) in accordance with the IEEE 802.3at (PoE+) standard, as well as the previous IEEE 802.3af (PoE) specifications.

Key Features

• Compliance with IEEE 802.3at Type 1 and 2 (PoE+)
• Four independent PoE channels
• Auto-detection of powered devices (PDs)
• Advanced power management and control
• High-efficiency operation with low heat dissipation
• Robust 100V MOSFETs integrated
• Supports 2-event classification
• Extended temperature range: -40°C to 125°C

Applications

The LTC4266AIUHF-4 is ideally suited for a wide range of applications that require reliable power distribution over Ethernet cables. Common applications include:

• VoIP phones
• Wireless network access points
• Security cameras
• Networked appliances
• Industrial controls

Product Advantages

The LTC4266AIUHF-4 provides several advantages to system designers and network administrators. Its ability to support up to four PDs on a single chip simplifies design and reduces board space. The integrated 100V MOSFETs allow for direct connection to a wide range of input voltages without the need for external pass transistors, improving reliability and reducing BOM cost.

The device also features sophisticated power management capabilities, including programmable current limit, inrush current control, and power good indicators. This allows for precise control over power allocation and ensures safe operation of the PDs. The extended temperature range makes the LTC4266AIUHF-4 suitable for harsh environments, ensuring reliable operation in industrial and outdoor settings.

Quality and Reliability

Linear Technology's LTC4266AIUHF-4 is designed with a commitment to quality and reliability, making it an excellent choice for critical network infrastructure. With robust protection features, including over-temperature, over-current, and over-voltage protection, this PoE controller ensures a secure and stable power delivery system for connected devices.