Dallas—TI's TPS23753 is a combined power-over-Ethernet powered device (PD) interface and current-mode DC/DC controller optimized specifically for 13-watt isolated converter designs. It touts low input voltage operation and smaller solution size for IP phones, IP security cameras, wireless access points, security card readers, and RFID scanners.
The TPS23753 operates from 12 to 57 volts, including operation down to 9.5 volts to support droop on any 12-volt local power supply. It includes current slope compensation to help minimize output rectifier stress for 12-volt 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 eases design and reduces system size by eliminating external components.
Pricing and availability: The TPS23753, in a 14-pin TSSOP package, is priced at $1.45 in 1k quantities. Evaluation modules are available online through power.ti.com/poe.
