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TPS23756

Texas Instruments
Part Number TPS23756
Manufacturer Texas Instruments
Description PoE Interface and DC-DC Controller
Published Jul 3, 2022
Detailed Description Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design TPS23754, TPS23...
Datasheet PDF File TPS23756 PDF File

TPS23756
TPS23756

Overview
Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design TPS23754, TPS23754-1, TPS23756 SLVS885I – OCTOBER 2008 – REVISED DECEMBER 2017 TPS2375x IEEE 802.
3at, High Efficiency, PoE Interface and DC-DC Controller 1 Features • Powers up to 30-W (Input) PDs • DC-DC Control Optimized for Isolated Converters • Supports High-Efficiency Topologies • Complete PoE Interface • Enhanced Classification per IEEE 802.
3at With Status Flag • Adapter ORing Support • Programmable Frequency With Synchronization • Robust 100-V, 0.
5-Ω Hotswap MOSFET • –40°C to 125°C Junction Temperature Range • Industry Standard PowerPAD™ HTSSOP-20 2 Applications • IEEE 802.
3at Compliant Devices • Video and VoIP Telephones • RFID Readers • Multiband Access Points • Security Cameras 3 Description The TPS23754 and TPS23756 devices have a combined power-over-ethernet (PoE), powereddevice (PD) interface, and current-mode DC-DC controller optimized specifically for isolated converters.
The PoE interface supports the IEEE 802.
3at standard.
The TPS23754 and TPS23756 support a number of input voltage 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.
1 The PoE interface features the new extended hardware classification necessary for compatibility with high-power midspan power sourcing equipment (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.
The DC-DC controller features two complementary gate drivers with programmable dead time.
This simplifies the design of active-clamp forward converters or optimized gate drive for highly-efficient flyback topologies.
The second gate driver may be disabled if desired for single MOSFET topologies.
The controller also features internal soft...


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