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DER-121 Fiches technique(PDF) 2 Page - Power Integrations, Inc.

No de pièce DER-121
Description  13.1 W AC-DC Flyback Converter Using TNY268P
Download  24 Pages
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Fabricant  POWERINT [Power Integrations, Inc.]
Site Internet  http://www.powerint.com
Logo POWERINT - Power Integrations, Inc.

DER-121 Fiches technique(HTML) 2 Page - Power Integrations, Inc.

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DER-121
13.1 W adapter – TNY268
November 3, 2005
Page 2 of 24
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Table Of Contents
1
Introduction .................................................................................................................3
2
Power Supply Specification ........................................................................................4
3
Schematic ...................................................................................................................5
4
Circuit Description.......................................................................................................6
4.1
Input Rectification and EMI Filtering ....................................................................6
4.2
TOPSwitch Primary .............................................................................................6
4.3
Output Rectification .............................................................................................6
4.4
Output Feedback .................................................................................................6
5
PCB Layout.................................................................................................................7
6
Bill Of Materials...........................................................................................................8
7
Transformer Specification ...........................................................................................9
7.1
Electrical Diagram................................................................................................9
7.2
Electrical Specifications .......................................................................................9
7.3
Materials ..............................................................................................................9
7.4
Transformer Build Diagram................................................................................10
7.5
Transformer Construction ..................................................................................10
8
Transformer Spreadsheets .......................................................................................11
9
Design Results..........................................................................................................11
9.1
Device Variables................................................................................................11
10
Performance Data .................................................................................................14
10.1
Efficiency ...........................................................................................................14
10.2
No-load Input Power ..........................................................................................14
10.3
Regulation .........................................................................................................15
10.4
CEC Efficiency...................................................................................................16
11
Waveforms ............................................................................................................17
11.1
Drain Voltage and Current, Normal Operation ...................................................17
11.2
Output Voltage Start-up Profile ..........................................................................17
11.3
Drain Voltage and Current Start-up Profile ........................................................18
11.4
Load Transient Response (50% to 100% Load Step)........................................18
11.5
Output Ripple Measurements ............................................................................19
12
Conducted EMI .....................................................................................................22
13
Revision History ....................................................................................................23
Important Note:
This board is designed to be non-isolated. However the outputs are high voltage so
please take the necessary safety precautions.
Design Reports contain a power supply design specification, schematic, bill of materials,
and transformer documentation. Performance data and typical operation characteristics
are included. Typically only a single prototype has been built.


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