Title Content

​Si3461 Single-Port PoE+ PSE Controller

The IEEE-required powered device (PD) detection feature uses a robust 3-point algorithm to avoid false detection events. The Si3461 controllers' PoE PSE reference design kit also provides full IEEE-compliant classification and PD disconnect. Intelligent protection circuitry includes input under voltage lockout (UVLO), classification-based current limiting, and output short circuit protection. The Si3461 PoE PSE is designed to operate completely independently of host processor control. An LED status signal is provided to indicate the port status including detection, power good, and output fault event information. The Si3461 is pin programmable to support four available power levels, endpoint and mid-span applications, and auto-retry or restart after disconnect functions. A comprehensive reference design kit (Si3461-KIT) includes a complete schematic, layout files and bill-of-materials (BOM) for an IEEE-compliant PoE PSE solution.