EPR-31 Datasheet, PDF (21/36 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP-31 Multiple Output 180 W AC-DC Power

01-Feb-05
EPR-31 – Multi-Output, 180 W, PC Main Power Supply
7.2.4 Transformer Build Diagram
2
1
8
Secondary
10
5
Primary
7
Figure 15 – 10 W PC Standby Transformer Build Diagram.
7.2.5 Transformer Construction
Primary Layer
Basic Insulation
Bias Winding
Basic Insulation
Secondary Winding
Outer Insulation
Final Assembly
Start at Pin 7. Wind 158 turns of item [3] from left to right, then
from right to left until done. It takes about 3¼ layers. Apply 1
layer of tape, item [5], between each winding layer for basic
insulation. Finish the wiring on Pin 5.
1 layer of tape [6] for insulation.
Start at pin 10. Wind 17 turns of item [5] from left to right.
Finish on pin 8.
1 Layer of tape [6] for insulation.
Start at Pin 1. Wind 7 bifilar turns of item [4] from left to right.
Wind uniformly in a single layer across entire width of bobbin.
Finish on Pin 2.
3 Layers of tape [6] for insulation.
Assemble and secure core halves. Dip varnish uniformly [7].
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