The TPS23751 is a 16-pin integrated circuit that combines a Power-over-Ethernet (PoE) powered device (PD) interface and a current-mode DC-DC controller optimized specifically for applications requiring high efficiency over a wide load range.
The PoE interface implements type-2 hardware classification per IEEE 802.3at. It also includes an auxiliary power detect (APD) input and a disable function (DEN). A 0.5-Ω, 100-V pass MOSFET minimizes heat dissipation and maximizes power utilization.
The DC-DC controller features internal soft-start, a bootstrap startup current source, current-mode control with slope compensation, blanking, and current limiting. Efficiency is enhanced at light loads by disabling synchronous rectification and entering variable frequency operation (VFO).
The TPS23752 is a 20-pin extended version of the TPS23751 with the addition of a Sleep Mode feature. Sleep Mode disables the converter to minimize power consumption while still generating the Maintain Power Signature (MPS) required by IEEE802.3at.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | TPS2375x IEEE 802.3at PoE Interface With Flyback DC-DC Controller datasheet (Rev. E) | PDF | HTML | Jan 26, 2018 |
| 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 | ||
| Technical article | Maximizing PoE PD efficiency on a budget | PDF | HTML | Nov 10, 2015 | |
| Application note | Lightning Surge Considerations for PoE Powered Devices | Apr 30, 2015 | ||
| Application note | TPS23752 Maintain Power Signature Operation in Sleep Mode | Apr 12, 2013 | ||
| Application note | High Efficiency Class 4 PoE Powered Device | Mar 23, 2011 | ||
| Application note | Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) | Feb 9, 2009 | ||
| Application note | Designing an EMI Compliant PoE with Isolated Flyback | May 20, 2008 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 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.