LTC4278IDKD#TRPBF: Power Over Ethernet (PoE) Interface Controller

The LTC4278IDKD#TRPBF is a highly integrated Power over Ethernet (PoE) interface controller from Linear Technology, designed to simplify the implementation of PoE-powered devices (PDs). This advanced controller is compliant with the IEEE 802.3at (PoE+) and IEEE 802.3af (PoE) standards, ensuring compatibility with a wide range of Power Sourcing Equipment (PSE) devices.

The LTC4278IDKD#TRPBF controller features an innovative LTPoE++™ technology, allowing for up to 90W of power delivery, surpassing the traditional PoE+ standard. This makes it an ideal choice for more demanding applications such as pan-tilt-zoom (PTZ) cameras, wireless access points, and remote computer terminals that require higher power levels.

This controller offers a robust and efficient solution for power device applications. It integrates a signature resistor, a classification engine, and a power MOSFET for a complete PoE interface port in a single package. The device's internal hot-swap MOSFET supports inrush and overload control, which protects both the PD and the switch or injector providing the power.

The LTC4278IDKD#TRPBF also features advanced power management capabilities, including programmable classification current, two-event classification, and a wide input voltage range of 9V to 57V. This flexibility ensures that the controller can adapt to various power requirements and system architectures.

For enhanced system reliability, the LTC4278IDKD#TRPBF includes comprehensive protection features such as current limit, thermal shutdown, and robust 80V abs max rating on the input supply. The device is offered in a compact, thermally enhanced 22-lead DFN package, which helps to minimize the footprint on the printed circuit board and ensures efficient heat dissipation.

Overall, the LTC4278IDKD#TRPBF is a versatile and reliable PoE interface controller that streamlines the design of PoE PDs, offering advanced features and protections to meet the needs of modern networked devices.