EPR-12 Datasheet, PDF (19/40 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP-12 - 145 W PC Forward Converter with TOP247 and 10 W 5 V Output Standby Flyback with TNY266

01-Feb-05
EPR-12 – PC Forward Converter with Standby Flyback Power Supply
7.1.3 Transformer Build Diagram
Figure 9 – EP-12 145 W Forward Transformer Build Diagram.
7.1.4 Transformer Construction
Margin Taping
Primary Winding
Basic Insulation
Margin Taping
Bias Winding
Reinforce Insulation
Copper Foil Winding
(5 V)
Reinforce Insulation
Margin Taping
12 V Winding
Outer Insulation
Use item [9] for the right and left margins.
Start at pin 5. Wind 45 turns of item [3] from left to right. Wind
uniformly in a single layer. End at pin 1.
1 Layer of tape [8] for basic insulation.
Use item [9] for the right and left margins.
Start at pin 3. Wind trifilar 6 turns of item [4] from left to right.
Wind uniformly in a single layer, across entire width of bobbin.
Finish on pin 7.
3 Layers of tape [7] for insulation.
Prepare copper ribbon [6] as shown in Figure 10. Match pin A
of the foil to pin 11 or 12 of the bobbin. Wind 3 turns of item
[6]. Finish by matching pin B of the foil to pins 8 and 9 of the
bobbin.
3 Layers of tape [7] for insulation.
Use item [9] for the right and left margins.
Start at pin 13. Wind 4 turns of item [5] from left to right. Wires
are populated in middle of bobbin. Finish at pin 14.
3 Layers of tape [7] for insulation.
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