Changes

FM-POE FACE Module incorporates 4 ports of GbE LAN supporting 10/100/1000BASE-T Ethernet connectivity, compliant with IEEE 802.3/u/ab standard. All four ports compliant with IEEE 802.3af* support PoE and PoE + PSE applications. Two additional USB2.0 downstream ports supporting data rates up to 480Mbps for general purpose connectivity.<br>Note that HW Rev1.0 1 supports PSE Class 0 (15.4W max) per port when 2 ports populated with PD Class 0 devices (12.95W max).<br>

When connected directly to the host system or configured in Auto mode, each Si3452 high-voltage port controller provides all of the critical circuitry and sophisticated The LTC4266С is a quad power measurement functionality for the high-voltage interfaces of four complete sourcing equipment (PSE ports. The Si3452 fully integrates robust, low-RON (0.3Ω typical) power MOSFET switches, low-power dissipation current sensing circuitry, and transient voltage surge suppression devices. The on-chip current sense circuitry and power MOSFETs provide programmable scaling controller capable of current limits delivering up to match 90W of PoE (350 mA, 15.4 W for 2 ports) and PoE+ (600 mA, 30 W for one port) power requirements on to a per port basis. Each Si3452 also performs the IEEE-required compatible PoE powered device (PD) detection, classification, and disconnect functionality.<br>The flexible architecture enables powered device disconnect A proprietary detection using Silicon Laboratories proprietary dV/dt disconnect sensing algorithm. dV/dt disconnect is an alternative to DC disconnect that requires no additional BOM components, does not dissipate extra device power, classification scheme allows mutual identification between a PoE PSE and fully interoperates PoE PD while remaining compatible and interoperable with all powered devices. Also provided are multi-point detection algorithms existing Type 1 (13W) and per-port current and voltage monitoringType 2 (25.5W) PDs.<br>Intelligent protection circuitry includes power supply under voltage lockout (UVLO), port output current limiting These PSE controllers feature low RON external MOSFETs and short-circuit protection, thermal overload sensing and port shutdown, and transient voltage surge suppressors capable of protecting 0.25Ω sense resistors which are especially important at the Si3452 from a variety of harsh surge events seen on PoE current levels to maintain the RJ-45 interfacelowest possible heat dissipation. To maximize system design flexibility and minimize cost, each Si3452 connects directly The LTC4266C targets fully automatic PSE systems powering Type 1 (up to a system host controller through an I2C serial interface13W) PDs.