The LTC9103AUKJ#PBF from Analog Devices is a 48-Port IEEE 802.3bt Power-Over-Ethernet PSE Controller that is ideal for PoE power sourcing equipments (PSE) switches/routers and midspan applications. It requires an input voltage of up to 57 V and delivers an output power of 71.3 W. This controller is fully compliant with IEEE 802.3bt Type 3 and 4 PSE and IEEE 802.3at Type 2 PSE standards. It includes up to 48 PSE ports with one power channel per port and up to 24 PSE ports with two power channels per port. This PoE controller features ECC-protected eFlash and data RAMs and has low power path dissipation per channel. It also offers very high-reliability multipoint power delivery (PD) detection to validate and distinguish between single-signature and dual-signature PDs.
This PoE controller provides continuous per-port power and current monitoring. It benefits from a 1MHz I2C compatible serial control interface and a pin or I2C programmable PD power. This controller is available in a surface-mount package that measures 7 x 11 mm.
