DER-57
Industrial – LNK501P
April 20, 2005
Table Of Contents
1
2
3
4
Introduction.................................................................................................................3
Power Supply Specification........................................................................................4
Schematic...................................................................................................................5
Circuit Description ......................................................................................................6
4.1
Input Stage..........................................................................................................6
4.2 LinkSwitch Operation......................................................................................6
4.3
4.4
4.5
Transformer.........................................................................................................7
Clamp and Feedback Components.....................................................................7
Output Stage.......................................................................................................8
5
6
7
PCB Layout ................................................................................................................9
Bill Of Materials ........................................................................................................10
Transformer Specification.........................................................................................11
7.1
Transformer Winding.........................................................................................13
Electrical Specifications.....................................................................................13
Materials............................................................................................................13
Transformer Build Diagram ...............................................................................14
Transformer Construction..................................................................................14
7.2
7.3
7.4
7.5
8
9
Performance Data ....................................................................................................15
8.1
Line and Load Regulation .................................................................................15
Input Current .....................................................................................................16
Efficiency...........................................................................................................16
Power Factor.....................................................................................................17
Standby Power..................................................................................................18
8.2
8.3
8.4
8.5
Waveforms ...............................................................................................................19
9.1
9.2
9.3
Output Voltage Start-up Profile .........................................................................19
Input Current Profile..........................................................................................20
Bulk Capacitor Voltage Profile...........................................................................20
Output Ripple Measurements ...............................................................................21
10.1.1 Ripple Measurement Technique ................................................................21
10.1.2 Measurement Results ................................................................................22
Conducted EMI.....................................................................................................23
Revision History....................................................................................................25
10
11
12
Important Note:
Although this board is designed to satisfy safety isolation requirements, the engineering
prototype has not been agency approved. Therefore, all testing should be performed
using an isolation transformer to provide the AC input to the prototype board.
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.
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
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