The LTC4266IUHF#PBF is a state-of-the-art Power over Ethernet (PoE) controller from Linear Technology, designed for use in applications that require the delivery of both data and power over a single Ethernet cable. This advanced Integrated Circuit (IC) is compliant with the IEEE 802.3at (PoE+) standard, as well as backward compatible with the IEEE 802.3af (PoE) standard, making it a versatile solution for a wide range of PoE applications.

Key Features

• Power Over Ethernet Compliance: Fully compliant with IEEE 802.3at Type 1 and 2, ensuring compatibility with existing PoE infrastructure and devices.
• Quad PSE Channels: Equipped with four independent PSE (Power Sourcing Equipment) channels, capable of delivering up to 90W of power per port, enabling support for high-power devices.
• Advanced Power Management: Features include programmable power-up sequencing, per-port power monitoring, and I2C interface for management, providing precise control over power distribution.
• High Efficiency: Boasts high power efficiency, reducing power loss and heat dissipation, which is critical for maintaining the reliability and longevity of network equipment.
• Robust Protection: Integrated robust protection mechanisms including overcurrent, overvoltage, undercurrent, and thermal protection, safeguarding both the PSE and the powered devices from electrical anomalies.

Applications

The LTC4266IUHF#PBF is ideal for a range of applications that require reliable power delivery in conjunction with data transmission. It is particularly well-suited for:

• Enterprise networking switches and routers
• Wireless network access points
• IP security cameras and surveillance systems
• VoIP telephones and conferencing systems
• Point of Sale (PoS) systems and kiosks

Technical Specifications

The LTC4266IUHF#PBF operates over a wide temperature range and comes in a 38-lead QFN package. It requires a single 51V to 57V supply for operation, simplifying the power supply design and minimizing external component count. The package is RoHS compliant, ensuring adherence to current environmental standards and regulations.

Conclusion

In summary, the LTC4266IUHF#PBF from Linear Technology is a powerful PoE controller that offers advanced features for efficient and safe power delivery over Ethernet networks. Its robust design and comprehensive feature set make it an excellent choice for system designers looking to implement PoE capabilities in their next-generation network devices.