Class 2 Mulitple Output, High Efficiency Flyback Converter for PoE Applications

(ACTIVE) PMP8407

Description & Features

Technical Documents

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Description

This reference evaluation module, featuring the TPS23785B PoE interface and DC-toDC contoller, is used for class 2 PoE applications where high effliency and multiple outputs are required.

The flyback converter with synchronous reftifier provides excellent efficiency and small size for PoE applications such as IP phones. The TPS23785B contains both the PoE powered device and the PWM contoller.

Features
  • Efficiency achieved >90%
  • 1.5% peak to peak cross regulation on 5V
  • Isolated multiple output (3.3V at 0.88A; 5V at 0.35A; 10V at 0.11A)
  • Uses TPS23785B high-power, high-efficiency PoE PD and DC-to-DC controller
  • Small board size
  • This circuit design is fully functional and tested and recommended for new design.

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  



Schematic/Block Diagram

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Design Files

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Bill of Materials (BOM)

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Parametrics
 PMP8407.1
(Output Voltage 1)
PMP8407.2
(Output Voltage 2)
PMP8407.3
(Output Voltage 3)
Vin (Min) (V)363636
Vin (Max) (V)575757
Vout (Nom) (V)3.3510
Iout (Max) (A).88.35.11
Output Power (W)2.9041.751.1
Isolated/Non-IsolatedIsolatedIsolatedIsolated
Input TypeDCDCDC
TopologyFlyback- Synchronous
POE
Flyback- Synchronous
POE
Flyback- Synchronous
POE

TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD17527Q5A  30V, N-Channel NexFET™ Power MOSFETs  MOSFETs  Not Available Not Available
TLV431A  1% Accuracy Low-Voltage Adjustable Precision Shunt Regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
TPS23785B  High-Power, High-Efficiency PoE PD and DC-to-DC Controller  Power over Ethernet (PoE)  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD17527Q5A VSONP (DQJ)| 8 Download Download
TLV431A Download Download
Download Download
Download -
Download Download
Download -
Download Download
TPS23785B Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views
PDF 648 16 Sep 2013 6
Design files (4)
Title Abstract Type Size (KB) Date Views
ZIP 313 16 Sep 2013 21
PDF 225 16 Sep 2013 5
PDF 121 16 Sep 2013 10
PDF 61 16 Sep 2013 28

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