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 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.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | High Efficiency PoE Interface and DC/DC Controller datasheet (Rev. D) | Nov 20, 2013 | |
| Application note | PoE Powered Devices Debug Guidelines | PDF | HTML | Jul 19, 2021 | |
| Application note | PoE PD Schematic Review Guidelines | PDF | HTML | Apr 29, 2021 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | Jun 25, 2018 | ||
| Application note | Lightning Surge Considerations for PoE Powered Devices | Apr 30, 2015 | ||
| Application note | Implementing a Buck Converter With the TPS23753A | Sep 20, 2010 | ||
| Application note | Using the TPS23753A with an External Error Amplifier | Aug 6, 2010 | ||
| Application note | Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) | Feb 9, 2009 | ||
| Application note | PoE Powered Device for 24 VAC Building Power Applications | Sep 10, 2008 | ||
| Application note | Designing an EMI Compliant PoE with Isolated Flyback | May 20, 2008 | ||
| Application note | Practical Guidelines EMI Compliant PoE | Mar 27, 2008 |
For additional terms or required resources, click any title below to view the detail page where available.
The TPS23757EVM contains evaluation and reference circuitry for the TPS23757. The TPS23757 contains a powered device (PD) and a power supply controller supporting many high-efficiency topologies. The TPS23757EVM supports the IEEE 802.3at (draft) standard for a type 1 PD (equivalent to the 13W (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| TSSOP (PW) | 20 | Ultra Librarian |
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.