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.
| Tipo | Título | Fecha | ||
|---|---|---|---|---|
| * | Data sheet | High Efficiency PoE Interface and DC/DC Controller datasheet (Rev. D) | 20 nov 2013 | |
| Application note | PoE Powered Devices Debug Guidelines | PDF | HTML | 19 jul 2021 | |
| Application note | PoE PD Schematic Review Guidelines | PDF | HTML | 29 abr 2021 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 jun 2018 | ||
| Application note | Lightning Surge Considerations for PoE Powered Devices | 30 abr 2015 | ||
| Application note | Implementing a Buck Converter With the TPS23753A | 20 sep 2010 | ||
| User guide | TPS23757EVM: Evaluation Module for TPS23757 (Rev. B) | 30 ago 2010 | ||
| Application note | Using the TPS23753A with an External Error Amplifier | 06 ago 2010 | ||
| Application note | Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) | 09 feb 2009 | ||
| Application note | PoE Powered Device for 24 VAC Building Power Applications | 10 sep 2008 | ||
| Application note | Designing an EMI Compliant PoE with Isolated Flyback | 20 may 2008 | ||
| Application note | Practical Guidelines EMI Compliant PoE | 27 mar 2008 |
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
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 (...)
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| TSSOP (PW) | 20 | Ultra Librarian |
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