LTC9102AUKJ#PBF

LTC9102 is a chipset is a 12/24-port power sourcing equipment (PSE) controller designed for use in IEEE 802.3bt Type 3 and 4 compliant power over ethernet (PoE) systems. It is designed to power compliant 802.3af, 802.3at, and 802.3bt PDs. This device's chipset delivers lowest-in-industry heat dissipation by utilizing low RDS(ON) external MOSFETs and 0.1ohm sense resistance per power channel. A transformer-isolated communication protocol replaces expensive opto-couplers and a complex isolated 3.3V supply, resulting in significant BOM cost savings. Advanced power management features include per-port 14bit current/voltage monitoring, programmable power limits, and versatile fast shut down of preselected ports. An advanced power management host software layer is available. PD detection uses a proprietary multipoint detection mechanism ensuring excellent immunity from false PD identification. It is used in application such as PoE PSE switches/routers and midspans etc.

• ECC-protected eflash and data RAMs
• Chipset provides electrical isolation
• Eliminates optos and isolated 3.3V supply
• Very high reliability multipoint PD detection
• Connection check distinguishes single-signature and dual-signature PDs
• Continuous per-port voltage and current monitoring
• 1MHz I²C compatible serial control interface, pin or I²C programmable PD power
• VDD supply current is 40mA typical at (TA = 25°C)
• Operating temperature is -40°C to 85°C
• Package style is 64-lead plastic QFN

注释

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