The LTC9111 is an IEEE 802.3cg compliant Single-Pair Power over Ethernet (SPoE) Powered Device (PD) controller. A wide 2.3V to 60V operating range capability with polarity correction make the LTC9111 particularly well suited for classification-based systems in building and factory automation. SCCP-based classification ensures full operating voltage is applied by the Power Sourcing Equipment (PSE) only when a valid PD is connected. The LTC9111 drives two external N-channel MOSFET switches during classification with micropower operation to minimize reservoir capacitor requirements. An external N-channel MOSFET switch isolates the output capacitance from the connector during classification and inrush. A voltage supervisor enables the external MOSFET when the PD input voltage exceeds the ON voltage threshold for the configured class and after a mandated delay. The EN output asserts after the controlled GATE pin ramp-up. The MOSFET is disabled if the input voltage drops below the OFF voltage threshold for the configured class. The LTC9111 drives a pair of external low-side N-channel MOSFETs with a low start-up voltage of 1.6V for polarity correction with reduced power losses. APPLICATIONS * Building Automation * Factory Automation * Security Systems * Traffic Control Systems * IEEE 802.3cg Compliant * Wide Input Voltage Range: 2.3V to 60V * Supports Serial Communication Classification Protocol (SCCP) * Wakeup Signature * Integrated 3.5V Standby Regulator * 150μA Maximum Current During Classification https://elecena.pl/product/21918353/industrial-spoe-pd-controller 2022-10-26 https://elecena.pl/product/21918353/industrial-spoe-pd-controller 2025-01-18