TI launches PoE Controller To Optimize Sub-13W Designs

Texas Instruments Inc. (TI) introduced a 13W Power over Ethernet (PoE) powered device controller with onboard dc-dc converter specifically designed to meet the needs of IEEE 802.3af-compliant applications. The new, highly-integrated device is said to ease system design and size for PoE applications, including IP phones, IP security cameras, wireless access points, security card readers and RFID scanners, to name a few.

The TPS23753 is optimized for isolated dc-dc switching topologies, including flyback topology. The TPS23753 will operate on a wide range of local power supplies in cases where PoE power is not available. The device operates from 12 to 57V, including operation down to 9.5V to support droop on any 12V local power supply. The dc-dc converter allows for operation in this range with an 80% duty cycle and current slope compensation, reducing output rectifier stress for 12V adapters.

To ease design with local power supplies, the TPS23753 features adapter priority programming that allows the designer to select which power source to use when both PoE and local power are available. Native support for this prioritization is said to ease design and reduces system size by eliminating external components.

TPS23753 is currently available in 14-pin TSSOP packaging. Suggested resale price is $1.45 in quantities of 1,000.