DC1366A

LINEAR TECHNOLOGY DC1366A Demonstration Board, Power Over Ethernet POE, I2C Interface, Reliable 4-Point PD Detection

demonstration circuit features LTC4266CUHF, a quad network power controller with I2C interface, designed for use in IEEE 802.3at compliant power sourcing equipment. External power MOSFETs enhance system reliability and minimize channel resistance, cutting power dissipation and eliminating the need for heatsinks 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. It includes advanced power management features, including current and voltage readback and programmable ICUT and ILIM thresholds. Available C libraries simplify power management software development. Proprietary 4 point PD detection circuitry minimizes false PD detection while supporting legacy phone operation. Midspan operation is supported with built in 2 event classification and backoff timing. Host communication via 1MHz I2C serial interface.

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Four independent PSE channels

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Compliant with IEEE 802.3at Type 1 and 2

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Very high reliability 4 point PD detection

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High capacitance legacy device detection

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1MHz I2C compatible serial control interface

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Midspan backoff timer

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Supports proprietary power levels above 25W

Companion with DC590B USB serial controller board, sold separately.