High Efficiency PoE Interface And DC/DC Controller

The TPS23757 is a combined Power Over Ethernet (PoE) powered device (PD) Interface and current-mode DC/DC controller optimized specifically for isolated converters. The PoE Interface supports the IEEE 802.3at (draft) standard for a type 1 PD, which is equivalent to the 13W standard of IEEE 802.3-2008. The TPS23757 supports a number of input voltage ORing options including highest voltage, external adapter preference, and PoE preference. The TPS23757 has an output flag indicating if an external wall adapter is active when used in conjunction with ORing controls. The detection signature pin CAN also be used to force power from the PoE source off. Classification CAN be programmed to any of the defined types with a single resistor. The DC/DC controller features two complementary Gate drivers with programmable dead time. This simplifies design of highly-efficient flyback topologies or active-clamp forward or flyback converters. The second Gate driver may be disabled if desired for single MOSFET topologies. The controller also features internal softstart, bootstrap startup source, current-mode compensation, and a 78% maximum duty cycle. A programmable and synchronizable Oscillator allows design optimization for efficiency and eases use of the controller to upgrade existing power supply designs. Accurate programmable blanking, with a default period, simplifies the usual current- sense Filter design trade-offs. The TPS23757 has a 9 V converter startup, permitting operation with 12 V wall adapters. By Texas Instruments
Part Manufacturer Description Datasheet Samples
TPS23757PW Texas Instruments High Efficiency PoE Interface and DC/DC Controller 20-TSSOP -40 to 125
TPS23757PWR Texas Instruments High Efficiency PoE Interface and DC/DC Controller 20-TSSOP -40 to 125
TPS23757 's PackagesTPS23757 's pdf datasheet
TPS23757PW TSSOP
TPS23757PWR TSSOP




TPS23757 Pinout, Pinouts
TPS23757 pinout,Pin out
This is one package pinout of TPS23757,If you need more pinouts please download TPS23757's pdf datasheet.

TPS23757 Application circuits
TPS23757 circuits
This is one application circuit of TPS23757,If you need more circuits,please download TPS23757's pdf datasheet.


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