LTC4268-1
Info: : PRODUCTION
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LTC4268-1

High Power PD with Synchronous No-Opto Flyback Controller

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Info: : PRODUCTION tooltip
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Part Details
Part Models 4
1ku List Price Starting From $2.90
Features
  • Robust 35W PD Front End
  • IEEE 802.3af Compliant
  • Rugged 750mA Power MOSFET with Precision Dual Level Current Limit
  • High Performance Synchronous Flyback Controller
  • IEEE Isolation Obtained Without an Opto-Isolator
  • Adjustable Frequency from 50kHz to 250kHz
  • Tight Multi-Output Regulation with Load Compensation
  • On-board 25k Signature Resistor
  • Programmable Classification Current to 75mA
  • Complete Thermal and Over-Current Protection
  • Available in Compact 32-Pin 7mm × 4mm DFN Package
Additional Details
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The LTC4268-1 is an integrated Powered Device (PD) controller and switching regulator intended for IEEE 802.3af and high power PoE applications up to 35W. By including a precision dual current limit, the LTC4268-1 keeps inrush below IEEE 802.3af current limit levels to ensure interoperability success while enabling high power applications with a 750mA operational current limit.

The LTC4268-1 synchronous, current-mode, flyback controller generates multiple supply rails in a single conversion providing for the highest system efficiency while maintaining tight regulation across all outputs. The LTC4268-1 includes patented No-Opto feedback topology to provide full IEEE 802.3af isolation without the need of opto-isolator circuitry.

The oversized power path and high performance flyback controller of the LTC4268-1 combine to make the ultimate solution for power hungry PoE applications such as WAPs, PTZ security cameras, RFID readers and ultra-efficient 802.3af applications running near the 12.95W limit.

The LTC4268-1 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
  • Magnetic Card Readers
  • High Power PoE Systems
Part Models 4
1ku List Price Starting From $2.90

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

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