EPR-00010 Datasheet, PDF (9/24 Pages) Power Integrations, Inc. – 15W, Universal Input, Single Output, Isolated Converter with TOP233Y

Engineering Prototype Report
Transformer Construction:
Double Primary Start at Pin 2. Wind 40 turns of item [3] from left to right. Wind in a single layer.
Layer
Wind remaining 33 turns (73 total) in the next layer from right to left. Finish on Pin 1.
Bias Winding
Reinforced
Insulation
+14V Winding
Outer Insulation
Core Preparation
Final Assembly
Start at Pin 4. Wind 16 turns Parallel Bifilar of item [3] from left to right. Wind
uniformly, in a single layer, across entire width of bobbin. Finish on Pin 5.
1 Layer of tape [5] for insulation.
Start at Pin 10. Wind 13 turns Parallel Bifilar of item [4] from left to right. Wind
uniformly, in a single layer, across entire width of bobbin. Finish on Pin 9.
3 Layers of tape [5] for insulation.
Wrap bottom of E core [1] with 2 layers of tape [6] as shown.
Assemble and secure core halves. Impregnate uniformly [7].
Core [1]
Tape [6]
Materials
Item
[1]
[2]
[3]
[4]
[5]
[6]
[7]
Description
Core: EPCOS (Siemens) E 20/10/6,B66311-G-X167, or equivalent.
Gapped ALG of 171 nH/T^.
Bobbin: EPCOS (Siemens) B66206-J1110-T1, or equivalent.
Magnet Wire: #30AWG Heavy Nyleze.
Triple Insulated Wire: # 28 AWG .
Tape: 3M 1298 Polyester Film (white) 12.2mm wide by 2.2 mils thick.
Tape: 3M 1298 Polyester Film (white) 15.7mm wide by 2.2 mils thick.
Varnish.
EPR-00010
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