The LTC4291IUF-1#PBF is an integrated power-sourcing equipment (PSE) controller from Linear Technology (now part of Analog Devices Inc.). It is designed to supply power to multiple devices in Power over Ethernet (PoE) applications. Here is an overview of its key features:
1. PoE/PoE+ Support: The LTC4291IUF-1#PBF is compliant with both the IEEE 802.3af and IEEE 802.3at standards for PoE and PoE+ applications. It can deliver up to 25.5W of power per port.
2. PSE Controller: This IC serves as a PSE controller, managing all the operations required to provide power to Ethernet-connected devices.
3. Integrated PD Detection: The LTC4291IUF-1#PBF features a built-in Powered Device (PD) detection capability. It can detect whether a connected device is a valid PD, ensuring safe power delivery.
4. Classification and Current Limiting: The device implements a classification mechanism to determine the power needs of connected PDs. It supports class 0, 1, 2, 3, and 4 classification. It also provides programmable current limit levels to ensure optimal power allocation.
5. Automatic Disconnect and Disable: The LTC4291IUF-1#PBF includes an automatic disconnect feature that can disable power delivery to faulty or disconnected PDs
