LTC4266CGW#PBF Datasheet PDF - Linear Technology

●The LTC4266CGW#PBF is a quad PSE Controller designed for use in IEEE 802.3 type 1 and type 2 (high power) compliant power over Ethernet systems. External power MOSFETs enhance system reliability and minimize channel resistance, cutting power dissipation and eliminating the need for heat-sinks even at type 2 power levels. External power components also allow use at very high power levels while remaining otherwise compatible with the IEEE standard. 80V-rated port pins provide robust protection against external faults. The LTC4266 includes advanced power management features, including current and voltage readback and programmable ICUT and ILIM thresholds. Available C libraries simplify power-management software development, an optional AUTO pin mode provides fully IEEE-compliant standalone operation with no software required. Proprietary 4-point PD detection circuitry minimizes false PD detection while supporting legacy phone operation.

● Four independent PSE channels

● Compliant with IEEE 802.3 at type 1 and 2

● 0.34R Total channel resistance

● 8-bit Programmable current limit (ILIM)

● 7-bit Programmable overload currents (ICUT)

● Fast shutdown of preselected ports

● 14.5-bit Port current/voltage monitoring

● 2-Event classification

● Very high reliability

● 4-point PD detection

● 2-point Forced voltage

● 2-point Forced current

● High capacitance legacy device detection

● Midspan backoff timer

● Supports proprietary power levels above 25W