Wednesday, December 5, 2012

tps23754.pdf download Texas Instruments TI pdf datasheet

 Powers up to 30 W (input) PDs " The TPS23754/6 supports a number of input voltage 
 DC/DC Control Optimized for Isolated Converters " Supports High-efficiency Topologies " ORing options including highest voltage, external adapter preference, and PoE preference. These features allow the designer to determine which power source will carry the load under all conditions. 
 Complete PoE Interface " The PoE interface features the new extended 
 Enhanced Classification per IEEE 802.3at with " hardware classification necessary for compatibility 
Status Flag  with high-power midspan power sourcing equipment 
 Adapter ORing Support " Programmable Frequency with Synchronization " (PSE) per IEEE 802.3at. 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. 
 Robust 100 V  0.5 . Hotswap MOSFET " ?0� to 125� Junction Temperature Range "
 Industry Standard PowerPAD" TSSOP-20 " design of active-clamp forward converters or 
optimized gate drive for highly-efficient flyback 
APPLICATIONS  topologies. The second gate driver may be disabled if 
 IEEE 802.3at Compliant Devices " desired for single MOSFET topologies. The controller also features internal softstart, bootstrap startup 
 Video and VoIP Telephones " source, current-mode compensation, and a 78% 
 RFID Readers " Multiband Access Points " maximum duty cycle. A programmable and synchronizable oscillator allows design optimization for efficiency and eases use of the controller to 
 Security Cameras " upgrade existing power supply designs. Accurate 
programmable blanking, with a default period, 
DESCRIPTION  simplifies the usual current-sense filter design trade-
The TPS23754/6 is a combined Power over Ethernet  offs. 
(PoE) powered device (PD) interface and current-mode dc/dc controller optimized specifically for isolated converters. The PoE interface supports the IEEE 802.3at standard.  The TPS23754 has a 15 V converter startup while the TPS23756 has a 9 V converter startup. The TPS23754-1 replaces the PPD pin with a no-connect for increased pin spacing. 

DatasheetDoc-Texas Instruments TI pdf datasheet download


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