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TI ships IC for "Power Over Ethernet" apps

Posted: 30 Apr 2003 ?? ?Print Version ?Bookmark and Share

Keywords:texas instruments? tps2370? tps2383? power over ethernet? power management ic?

Texas Instruments (TI) Inc. has released two new power management ICs that allow dc power and data to be deliver and sourced over a single, standard Ethernet cable, and accelerate the adoption of "Power over Ethernet" systems.

Both are compliant with the soon-to-be ratified IEEE 802.3af standard and can be integrated into WLAN access points, IP phones, security systems, POS terminals, and Ethernet routers.

The TPS2370 power interface switch manages discovery, classification, and the delivery of dc power to a powered device over a standard Ethernet twisted pair cable. In addition, the TPS2383 power sourcing equipment manager can independently manage power for up to eight Ethernet ports.

Available as an 8-pin SOIC or TSSOP, the TSP2370 also provides inrush current limiting and switch FET control. An internal 0.3 ohm FET minimizes heat dissipation, while an external 25-kiloohm resistor helps in the accurate power device detection.

The TPS2383 is available as a 64-pin LQFP and manages power in multiple Ethernet ports. All operation of the IC are controlled through register R/W operation over a standard I?C serial interface. It has five selection pins, which permits the device to address up to 32 devices, and provide individual control and monitoring of up to 256 Ethernet ports from a single master I?C controller.

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