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威尼斯游乐城appTexas Instruments TPS23785B High-Power High Efficiency PoE PD & DC-to-DC Controller

Texas Instruments TPS23785B High-Power High Efficiency PoE PD & DC-to-DC Controller

威尼斯游乐城appTexas Instruments TPS23785B High-Power High Efficiency PoE PD & DC-to-DC Controller is a combined Power over Ethernet (PoE) powered device (PD) interface and current-mode DC-to-DC controller optimized specifically for non-isolated converters. The PoE interface supports the IEEE 802.3at standard. The TPS23785B supports 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. The PoE interface features the two-event, physical-layer 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.

Features

  • Powers up to 30W (Input) PDs

  • 威尼斯游乐城appDC-to-DC Control Optimized for Non-Isolated Converters

  • 威尼斯游乐城appSupports High-Efficiency Topologies

  • 威尼斯游乐城appComplete PoE Interface

  • 威尼斯游乐城appEnhanced Classification per IEEE 802.3at with Status Flag

  • Adapter ORing Support

  • Robust 100V, 0.5Ω Hotswap MOSFET

  • 威尼斯游乐城app-40°C to 125°C Junction Temperature Range

  • 威尼斯游乐城appIndustry Standard PowerPAD TSSOP-24

Applications

  • IEEE 802.3at Compliant Devices

  • Video and VoIP Telephones

  • 威尼斯游乐城appRFID Readers

  • Surveillance Cameras

  • Wireless Access Points

Functional Block Diagram
Functional Block Diagram


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