User Guide
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Design & Integration File
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Overview

Features and Benefits

  • Galvanically isolated 12V flyback DC output with up to 24 W of output power capability
  • No Transformer third winding or Opto-Isolator for output regulation
  • Supports IEEE802.3at (PoE+, Type 2) and IEEE802.3bt (PoE++, Type 3 and 4) interfacing and power supply control via a configurable jumper array
  • Supports a wide input DC auxiliary power of 37V to 57V

Product Details

The AD-PS3803-RD reference design is a power converter capable of harnessing any IEEE802.3at (PoE+, Type 2) compliant downstream Power-Over-Ethernet (PoE) supply to provide a galvanically isolated DC power.

At the core of this solution is the LT8306 60V No-Opto Flyback controller, stepping down the 37V to 57V PoE input voltage to a 12V, 24W DC output.

The on-board LT4275 LTPoE++/PoE+/PoE power delivery (PD) controller handles interfacing and power delivery to any PoE supply.

The LT4321 ideal diode bridge controller is used for improved end-to-end power delivery efficiency and eased thermal design by utilizing low RDS(ON) N-Channel FETs, replacing the eight-diode configuration typically found in passive PoE rectifier bridge.

The AD-PS3803-RD also has auxiliary DC power support for a wide input range of 37V to 57V.

APPLICATIONS

  • Industrial Automation
  • Surveillance Camera Systems
  • VoIP Phones
  • Payment Terminal Systems
  • Wireless Access Points

Markets and Technologies

Applicable Parts

Documentation & Resources

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