The LTC9101-2A/LTC9102 chipset is a (up to) 48-port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at Type 1 and 2 compliant Power over Ethernet (PoE) systems. The LTC9101-2A/LTC9102 is designed to power compliant 802.3af and 802.3at PDs. The LTC9101-2A/LTC9102 chipset delivers lowest-in-industry heat dissipation using low RDS(ON) external MOSFETs and 0.1Ω sense resistance per power channel. A transformer-isolated communication protocol replaces expensive optocouplers and a complex isolated 3.3V supply, resulting in significant bill of materials (BOM) cost savings. Advanced power management features include per-port 14‑bit current/voltage monitoring, programmable current limits, and versatile fast shutdown of preselected ports. PD detection uses a proprietary multipoint detection mechanism, ensuring excellent immunity from false PD identification. 1-event and 2-event physical classification are supported. The LTC9101-2A/LTC9102 includes an I2C serial interface operable up to 1MHz. The LTC9101-2A/LTC9102 is pin or I2C programmable to negotiate PD-delivered power up to 25.5W. APPLICATIONS * PoE PSE Switches/Routers and Midspans * Fully Compliant IEEE 802.3at Type 1 and 2 PSE * Up to 48 PSE Ports * Industry-Standard Register Map * +80V/–20V Tolerant Port-Facing Pins * ECC-Protected eFlash and Data RAMs * Low Power Path Dissipation per Channel * 100mΩ Sense Resistance * 30mΩ or Lower MOSFET RDS(ON) * Chipset Provides Electrical Isolation * Eliminates Optos and Isolated 3.3V Supply https://elecena.pl/product/24157253/12-24-48-port-ieee-802-3at-poe-pse-digital-controller 2023-09-07 https://elecena.pl/product/24157253/12-24-48-port-ieee-802-3at-poe-pse-digital-controller 2025-01-17