120VAC Input, PSR 5V 25W Flyback Reference Design PMP20771 (ACTIVE)

Description & Features

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Key Document

Description

This reference design is a 120Vac to 5V primary side regulated flyback converter with synchronous rectification on the secondary side.  The reference design has extremely low standby power at 67mW.  UCC28704 features integrated CC-CV regulation without the use of an optocoupler. PMP20771 utilizes synchronous rectification which improves system efficiency across the designed load range.

Features
  • Over 88% efficiency at full load
  • Low standby power, 67mW with no load
  • 1oz, 2-layer board measuring 7mm x 38mm size
  • Primary side regulation eliminates the need for an optocoupler

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Schematic/Block Diagram

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Design Guide

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Design Files

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Parametrics
 PMP20771.1
(Output Voltage 1)
Vin (Min) (V)108
Vin (Max) (V)132
Vout (Nom) (V)5
Iout (Max) (A)5
Output Power (W)25
Isolated/Non-IsolatedIsolated
Input TypeAC
TopologyFlyback- Synchronous

TI Devices (3)

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
CSD17559Q5  30V, N ch NexFET MOSFET™, single SON5x6, 1.5mOhm  MOSFETs  Sample & Buy Not Available
UCC24636  Synchronous Rectifier Controller With Ultra-Low Standby Current  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
UCC28704  Off-Line Constant-Voltage Constant-Current Flyback Controller With Primary-Side Regulation (PSR)  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD17559Q5 Download
UCC24636 Download Download
UCC28704 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1937 13 Nov 2017
Design files (3)
Title Type Size (KB) Date
PDF 97 13 Nov 2017
PDF 36 13 Nov 2017
PDF 111 13 Nov 2017
Related Tools & Software

Reference Designs  ( 1 )


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