Class 1 Mulitple Output High Efficiency Flyback Converter for PoE Applications Reference Design

(ACTIVE) PMP8752

Description & Features

Technical Documents

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


Description

This converter is used for Class 1 PoE applications where high-efficiency and multiple-outputs are required. The multi-outputs for this design are 3.3V/0.7A, 5V/0.145A, 3.3V/1.5A. The flyback converter with synchronous rectifier provides excellent efficiency, and small size for PoE applications, such as an IP phone solution.

The TPS23785B contains both the PoE powered device and the PWM controller functions.

Features
  • Multiple outputs for 3.3V/0.7A, 5V/0.145A, 3.3V/1.5A
  • High efficiency (89%)
  • Isolated flyback with synchronous rectifier
  • Small solution size
  • Uses TPS23785 with PoE interface PD and PWM controller
  • This circuit design is full-functional tested and recommended for new designs.

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


  




Parametrics
 PMP8752.1
(Output Voltage 1)
PMP8752.2
(Output Voltage 2)
Vin (Min) (V)3636
Vin (Max) (V)5757
Vout (Nom) (V)3.35
Iout (Max) (A).7.15
Output Power (W)2.31.75
Isolated/Non-IsolatedIsolatedIsolated
Input TypeDCDC
TopologyFlyback- Synchronous
POE
Flyback- Synchronous
POE

TI Devices (4)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD17507Q5A  30V N-Channel High Side NexFET Power MOSFET with 20 Volt Vgs  Power MOSFET  Sample & Buy View Design Kits & Evaluation Modules
TL431A  Adjustable Precision Shunt Regulator  Voltage Reference  Sample & Buy Not Available
TLV431A  Low Voltage Adjustable Precision Shunt Regulator  Voltage Reference  Sample & Buy View Design Kits & Evaluation Modules
TPS23785B  High-Power, High-Efficiency PoE PD and DC-to-DC Controller  Power Over Ethernet (PoE)/LAN Solutions  Sample & Buy Not Available

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 445 01 Feb 2013 28
Design files (3)
Title Abstract Type Size (KB) Date Views
ZIP 314 19 May 2014 75
PDF 140 16 Sep 2013 17
PDF 51 01 Feb 2013 124


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