22-Jun-2006
EP-93 – 30 V, 1.07 A, 2.7 A (peak), Universal Input Supply
Table Of Contents
1
2
3
4
Introduction.................................................................................................................5
Power Supply Specification ........................................................................................6
Schematic...................................................................................................................7
Circuit Description.......................................................................................................8
4.1
Input EMI Filtering................................................................................................8
PeakSwitch Primary.............................................................................................8
Output Rectification and Filtering.........................................................................9
Output Feedback .................................................................................................9
Output Protection.................................................................................................9
4.2
4.3
4.4
4.5
5
6
7
PCB Layout...............................................................................................................10
Bill Of Materials.........................................................................................................11
Transformer Specification.........................................................................................13
7.1
Electrical Diagram..............................................................................................13
Electrical Specifications.....................................................................................13
Materials............................................................................................................14
Transformer Build Diagram................................................................................14
Transformer Construction..................................................................................15
7.2
7.3
7.4
7.5
8
9
Transformer Spreadsheet.........................................................................................16
Performance Data.....................................................................................................19
9.1
Efficiency ...........................................................................................................19
9.1.1
Active Mode CEC Measurement Data........................................................19
No-load Input Power..........................................................................................21
Available Standby Output Power .......................................................................21
Regulation .........................................................................................................22
9.2
9.3
9.4
9.4.1
9.4.2
Load Regulation .........................................................................................22
Line Regulation...........................................................................................22
10
11
Thermal Performance............................................................................................23
Waveforms............................................................................................................24
11.1 Drain Voltage and Current, Normal Operation...................................................24
11.2 Output Voltage Start-up Profile..........................................................................24
11.3 Drain Voltage and Current Start-up Profile ........................................................25
11.4 Load Transient Response (1 A to 2 A Load Step) .............................................25
11.5 Holdup Time ......................................................................................................26
11.6 AC Line Disturbance..........................................................................................27
12
Output Ripple Measurements................................................................................30
12.1.1 Ripple Measurement Technique.................................................................30
12.1.2 Measurement Results.................................................................................31
Output Over-current Shutdown/Restart.................................................................32
Line Surge.............................................................................................................33
Conducted EMI .....................................................................................................34
Appendix ...............................................................................................................36
13
14
15
16
16.1 Heat Sink Drawing.............................................................................................36
17
Revision History ....................................................................................................37
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