TI's high-power PoE controller delivers over 90 percent efficiency

BANGALORE, INDIA: Texas Instruments Inc. (TI) recently introduced a high-efficiency, high-power Power-over-Ethernet (PoE) controller for 13-watt or 26-watt powered device (PD) applications, such as IP phones, wireless access points or security cameras.

Fully compliant to the IEEE 802.3at draft 4.0 standard, the integrated TPS23754 supports DC/DC converter topologies that can achieve higher than 90 percent power conversion efficiency, which reduces heat and increases reliability of the system.

The single-chip PoE solution leverages a 100-V manufacturing process to provide a robust solution in a 13-watt or 26-watt design. For product details and to request samples see: www.ti.com/tps23754-pr.

Along with the TPS23754, TI is sampling the TPS23756 to support auxiliary input voltages as low as 12 V, allowing a PoE designer to use popular, inexpensive 12-V wall adapters. Additionally, the TPS23757 will support 13-W and below applications requiring the higher efficiency DC/DC topologies. Both the TPS23756 and TPS23757 will be available in the third quarter.

Key features
* Complementary auxiliary driver with programmable dead-time.
* PD controller supports up to 825-mA continuous current.
* Power source selection priority.
* Current and inrush limit.
* 100-V monolithic SOI process.