RDR-131 Datasheet, PDF (2/24 Pages) Power Integrations, Inc. – Reference Design Report for 3 W Non- Isolated Constant Current LED Driver Using LNK306DN

RDR-131 LED Driver – LNK306DN
7-Mar-07
Table of Contents
1 Introduction...............................................................................................................3
2 Power Supply Specification ......................................................................................5
3 Circuit Diagram.........................................................................................................6
4 Circuit Description ....................................................................................................7
4.1 Configuration and Assembly Details..................................................................7
4.2 AC Input Rectification ........................................................................................7
4.3 LinkSwitch-TN ...................................................................................................7
4.4 Output Feedback...............................................................................................7
5 Bill of Materials .......................................................................................................10
5.1 Filter Board Bill of Materials.............................................................................10
5.2 Converter Board Bill of Materials.....................................................................11
6 PI Xls Design Spreadsheet.....................................................................................12
7 Performance ...........................................................................................................14
7.1 Efficiency .........................................................................................................14
7.2 Output Current Regulation Vs. Line Voltage....................................................15
7.3 Output VI Characteristic ..................................................................................15
8 Waveforms .............................................................................................................16
8.1 Drain Voltage and Current, Normal Operation.................................................16
8.2 Output Current and Voltage.............................................................................16
8.3 Drain Current and Bulk Capacitor Voltage.......................................................17
8.4 Startup Drain Current and Bulk Capacitor Voltage ..........................................17
8.5 Startup Output Voltage and Current ................................................................18
8.6 Fault Conditions ..............................................................................................18
9 Thermal Measurements..........................................................................................19
10 Conducted EMI.......................................................................................................20
10.1 Competitive Product EMI.................................................................................21
11 Revision History......................................................................................................22
Important Note:
This board has no safety isolation. Therefore, all testing should be performed using an
isolation transformer to provide the AC input to the prototype board.
Power Integrations, Inc.
Tel: [phone] Fax: [phone]
www.powerint.com
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