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Texas Instruments' high-power Power-over-Ethernet controller can deliver greater than 90 percent efficiency

Posted on: Monday, 18 May 2009, 08:00 CDT

Integrated PoE Plus controller meets new standard for powered device applications

DALLAS, May 18 /PRNewswire/ -- Texas Instruments Incorporated (TI) (NYSE: TXN) introduced today 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

Key benefits

• Supports high-efficiency isolated flyback and forward DC/DC converter topologies
• Implements IEEE 802.3at (draft 4.0) for PD applications requiring greater than 13 W
• Natively supports external, local power sources with or without PoE power present
• PD front end protects against current inrush and short circuits
• Robust manufacturing process withstands voltage surges up to 100 V at the IC

Availability and pricing

The TPS23754 is available now in a HTSSOP-20 package and is priced at $1.90 in quantities of 1,000. The TPS23756 will be available in third quarter in the same quantities and pricing. The TPS23757, also available in third quarter, is priced at $1.65 in quantities of 1,000.

Find out more about PoE and connect with TI by visiting the links below:

• See TI PoE portfolio, tools and resources: www.ti.com/poe-pr
• Get PoE design support on TI E2E Community: www.ti.com/poecommunity-pr
• Find TI power management products and tools: www.ti.com/power-pr
• TI's IP phone solutions: www.ti.com/voip-pr

About Texas Instruments

Texas Instruments (NYSE: TXN) helps customers solve problems and develop new electronics that make the world smarter, healthier, safer, greener and more fun. A global semiconductor company, TI innovates through manufacturing, design and sales operations in more than 25 countries. For more information, go to www.ti.com

Please refer all reader inquiries to: Texas Instruments Incorporated Semiconductor Group, SC-09047 Literature Response Center 14950 FAA Blvd. Fort Worth, TX 76155 1-800-477-8924

Trademarks

All registered trademarks and other trademarks belong to their respective owners.

SOURCE Texas Instruments Incorporated

Source: PR Newswire

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