LTC4269-2
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LTC4269-2

IEEE 802.3at High Power PD and Synchronous Forward Controller with AUX Support

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LTspice LTC4269-2 - Power-over-Ethernet (PoE) Interface Controllers Download 5.36 KB
Part Models 4
1ku List Price Starting From $2.71
Features
  • 25.5W IEEE 802.3at Compliant (Type-2) PD
  • PoE+ 2-Event Classification
  • IEEE 802.3at High Power Available Indicator
  • Integrated State-of-the-Art Synchronous Forward Controller
    • – Isolated Power Supply Efficiency >94%
  • Flexible Auxiliary Power Interface
  • Superior EMI Performance
  • Robust 100V 0.7Ω (Typ) Integrated Hot Swap™ MOSFET
  • Integrated Signature Resistor, Programmable Class Current, UVLO, OVLO and Thermal Protection
  • Short-Circuit Protection with Auto-Restart
  • Programmable Switching Frequency from 100kHz to 500kHz
  • Thermally Enhanced 7mm × 4mm DFN Package
Additional Details
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The LTC4269-2 is an integrated Powered Device (PD) interface and power supply controller featuring 2-event classification signaling, flexible auxiliary power options, and a power supply controller suitable for synchronously rectified forward supplies. These features make the LTC4269-2 ideally suited for an IEEE802.3at PD application.

The PD controller features a 100V MOSFET that isolates the power supply during detection and classification, and provides 100mA inrush current limit. Also included are power good outputs, an undervoltage/overvoltage lockout and thermal protection. The current mode forward controller allows for synchronous rectification, resulting in an extremely high efficiency, green product. Soft-start for controlled output voltage start-up and fault recovery is included. Programmable frequency over 100kHz to 500kHz allows flexibility in efficiency vs size and low EMI.

Applications

  • IP Phones with Large Color Screens
  • Dual Radio 802.11n Access Points
  • PTZ Security Cameras
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LTspice LTC4269-2 - Power-over-Ethernet (PoE) Interface Controllers Download 5.36 KB
Part Models 4
1ku List Price Starting From $2.71
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LTC4269-2

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Data Sheet

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UPDATED 04/06/2010
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LTC4269-2: IEEE 802.3at High Power PD and Synchronous Forward Controller with AUX Support Data Sheet

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UPDATED 06/11/2010
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LTC4269-2: 補助サポート付きIEEE 802.3at 高電力PDおよび同期整流式フォワード・コントローラ データシート

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UPDATED 01/23/2013
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UPDATED 09/01/2009
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PD Controller ICs with Integrated Flyback or Forward Controllers Meet Demands of 25.5W PoE+ redirect icon

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Documentation

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Power over Ethernet Solutions
PoE PD Controllers
PoE+ for the Power Hungry

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2018-08-20

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Next Generation Power Over Ethernet

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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LTC4269IDKD-2#PBF 32-Lead DFN (7mm x 4mm w/ EP) external-link
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LTC4269IDKD-2#TRPBF 32-Lead DFN (7mm x 4mm w/ EP) external-link
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PRODUCTION

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Evaluation Kits 1

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DC1351B

LTC4269-2 | PoE Powered Device w/48V Isolated Auxiliary, VOUT = 5V, IOUT = 5A

Evaluation Kits1

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DC1351B

LTC4269-2 | PoE Powered Device w/48V Isolated Auxiliary, VOUT = 5V, IOUT = 5A

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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LTC4269-2 - Power-over-Ethernet (PoE) Interface Controllers Download

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