TI intros high-power PoE Manager

BANGALORE: Texas Instruments Inc. (TI) today introduced the industry’s first fully integrated Power over Ethernet (PoE) management device that allows multi-port enterprise systems to deliver up to 25 watts of power over a standard Ethernet cable.

Supporting operation at -40º to +125º C, the power source equipment (PSE) manager enables commercial, industrial, medical and military applications to manage Ethernet-powered devices using nearly twice the power as previous IEEE 802.3af-compliant systems.

TI’s TPS23841 quad-port PoE integrated circuit (IC) provides power management control and protection, while safely delivering up to 665 mA per port from input voltage levels of 21.5 V to 57 V. The device’s extremely wide input voltage capability allows designers to support emerging Ethernet-powered 24-V medical and industrial applications, such as nurse call center systems and human machine-interaction equipment.

The TPS23841 simplifies PoE design by integrating several key components onto a single chip, including integrated switches and sense resistors and four individual 15-bit analog-to-digital (A/D) converters, which allows the device to accurately measure signature resistance, voltage, current and die temperature.

The TPS23841 also provides three different options – automatic mode, semi-auto mode or manual operation – that give designers added flexibility to meet specific PoE system requirements. While in manual mode, the TPS23841 can work with a microcontroller, such as TI’s MSP430 ultra-low-power microcontroller, to detect legacy capacitance loads.

The TPS23841 power manager is available from TI and its authorized distributors. Suggested resale pricing is $7.50 in quantities of 1,000 units.

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