LTC4269-1
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LTC4269-1

IEEE 802.3at High Power PD and No-Opto Flyback Controller with AUX Support

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LTspice LTC4269-1 - Power-over-Ethernet (PoE) Interface Controllers Download 6.72 KB
Part Models 4
1ku List Price Starting From $2.47
Features
  • 25.5W IEEE 802.3at Compliant (Type 2) PD
  • Integrated State-of-the-Art Synchronous Flyback
    Controller
    •  Isolated Power Supply Efficiency >92%
    • 88% Efficiency Including Diode Bridge and Hot Swap™ FET
  • Flexible Integrated Auxiliary Power Support
  • Superior EMI Performance
  • Robust 100V 0.7Ω (Typ) Integrated Hot Swap MOSFET
  • IEEE 802.3at High Power Available Indicator
  • Integrated Signature Resistor and Programmable Class Current
  • Undervoltage, Overvoltage and Thermal Protection
  • Short-Circuit Protection with Auto-Restart
  • Programmable Soft-Start and Switching Frequency
  • Complementary Power Good Indicators
  • Thermally Enhanced 7mm × 4mm DFN Package
Additional Details
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The LTC4269-1 is an integrated Powered Device (PD) controller and switching regulator intended for high power IEEE 802.3at and 802.3af applications. The LTC4269-1 is targeted for high efficiency, single and multioutput applications from 10W to 25W. By supporting both 1-event and 2-event classifications, as defined by the IEEE, the LTC4269-1 can be used in a wide range of product configurations.

The LTC4269-1 synchronous, current mode, flyback controller generates multiple supply rails in a single conversion step providing for the highest system efficiency while maintaining tight regulation across all outputs. The LTC4269-1 includes patented No-Opto feedback topology to provide full IEEE 802.3 isolation without the need of an opto-isolator circuit. A true soft-start function allows graceful ramp-up of all output voltages.

All PD solutions from ADI include a shutdown pin to provide flexible auxiliary power options. The LTC4269-1 can accommodate adaptor voltages from 18V to 60V and supports both PoE or aux dominance options. The LTC4269-1 is available in a space saving 32-pin DFN package.

Applications

  • VoIP Phones with Advanced Display Options
  • Dual-Radio Wireless Access Points
  • PTZ Security Cameras
  • RFID Readers
  • Industrial Controls
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file View Data Sheet
Documentation View All Documentation
LTspice LTC4269-1 - Power-over-Ethernet (PoE) Interface Controllers Download 6.72 KB
Part Models 4
1ku List Price Starting From $2.47
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LTC4269-1

Documentation

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Data Sheet

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UPDATED 08/28/2012
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LTC4269-1: IEEE 802.3at High Power PD and No-Opto Flyback Controller with AUX Support Data Sheet

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UPDATED 11/06/2012
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LTC4269-1: 同期整流式No-Opto フライバック・コントローラ付きIEEE 802.3at PD データシート

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Reliability Data

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UPDATED 03/26/2018
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User Guide

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UPDATED 07/26/2011
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Documentation

Documentation

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

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2018-08-20

02:51

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
LTC4269CDKD-1#PBF 32-Lead DFN (7mm x 4mm w/ EP) external-link
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  • Material Declaration external-link
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LTC4269CDKD-1#TRPBF 32-Lead DFN (7mm x 4mm w/ EP) external-link
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LTC4269IDKD-1#PBF 32-Lead DFN (7mm x 4mm w/ EP) external-link
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  • Material Declaration external-link
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LTC4269IDKD-1#TRPBF 32-Lead DFN (7mm x 4mm w/ EP) external-link
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Software & Part Ecosystem

Software & Part Ecosystem

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PRODUCTION

Power and Current Monitor

Evaluation Kit

Evaluation Kits 2

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DC1335B-C

LTC4269-1 | PoE Powered Device w/48V Isolated Auxiliary, VOUT = 12V, IOUT = 2A

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DC1335B-B

LTC4269-1 | PoE Powered Device w/48V Isolated Auxiliary, VOUT = 5V, IOUT = 5A

Evaluation Kits2

evaluation kit item images

DC1335B-C

LTC4269-1 | PoE Powered Device w/48V Isolated Auxiliary, VOUT = 12V, IOUT = 2A
evaluation kit item images

DC1335B-B

LTC4269-1 | PoE Powered Device w/48V Isolated Auxiliary, VOUT = 5V, IOUT = 5A
Tools & Simulations

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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LTC4269-1 - Power-over-Ethernet (PoE) Interface Controllers Download

6.72 K
Reference Designs

Reference Designs 1

Portable Radio Reference Design Block Diagram

CN0412

ADRV-PACKRF Robust Portable Radio Design

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CN0412

ADRV-PACKRF Robust Portable Radio Design

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CN0412

Circuits from the lab

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ADRV-PACKRF Robust Portable Radio Design

Features and Benefits

  • Two Complete Radios
    • 2-Tx, 2-Rx, 2-Observation
  • Multiple Power Options
    • Wall Connected, Power over Ethernet, Battery
  • Built in IMU and GPS for tracking
  • Fully configurable and customizable software
View Detailed Reference Design external link

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Design & Integration Tools

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ZIP

CN0412-DesignSupport.zip link icon

13.25 M

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Portable Radio Reference Design Block Diagram

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