EPR-000013 Datasheet, PDF (43/56 Pages) Power Integrations, Inc. – Engineering Prototype Report (EP13) 43 W / 57 W pk, 5 Output TOPSwitch팜-GX (TOP246Y) Power Supply

08-May-2001
EPR-000013 – 43 W Multiple Output TOP246 Power Supply
15.8 Winding Instructions
Bobbin Preparation
Margin Taping
1^st Primary Winding
Basic Insulation
Shield
Basic Insulation
Bifilar Bias Winding
Reinforced Insulation
Margin Taping
Copper Foil Winding
Basic Insulation
+12 V Bifilar Winding
+18 V Bifilar Winding
+30V Winding
Reinforced Insulation
Margin Taping
2^nd Primary Winding
Outer Insulation
Varnish
Remove pins 2 and 5 on bobbin.
Apply a 3.2 mm margin at each side of bobbin using item [10].
Match combined height of 1^st primary, shield and bias
windings.
Start at pin 4. Wind 30 turns of item [3] uniformly across the
bobbin in one layer. Finish at pin 3.
Apply one layer of tape [9] for basic insulation.
Prepare shield assembly using items [4] and [6]. Position
shield assembly so that termination wire is adjacent to pin 1.
Wrap foil around bobbin, and insulate between overlapping foil
ends using tape [9]. Terminate drain wire at pin 1.
Apply one layer of tape [9] for basic insulation.
Start at pin 6. Wind 7 bifilar turns of item [4] uniformly in a
single layer, across entire width of bobbin. Finish on pin 7.
Apply three layers of tape [8] for reinforced insulation.
Apply a 3.2 mm margin at each side of bobbin using item [10].
Match combined height of secondary windings.
Prepare cuffed foil assembly as shown below, using items [5],
[7], [8], and [9]. Start foil winding at pin 9. Wind 1 turn and
terminate tap at pin 11. Wind 2 additional turns and finish at
pin 10.
Apply one layer of tape [9] for basic insulation.
Starting at pin12, wind 4 bifilar turns of item [4] evenly across
bobbin. Finish at pin 8.
Starting at pin 13, wind 3 bifilar turns of item [4] directly over
the 12 V winding. Apply turns evenly across bobbin. Finish at
Pin 12.
Starting at pin 14, wind 6 turns of item [4] directly over the
18 V winding. Apply turns evenly across bobbin. Finish at
Pin 13.
Apply three layers of tape [8] for reinforced insulation.
Apply a 3.2 mm margin at each side of bobbin using item [10].
Match height of 2nd primary winding.
Start at pin 3. Wind 23 turns of item [3] uniformly across the
bobbin in one layer. Finish at pin 1.
Apply 3 Layers of tape [8] for outer insulation
Impregnate transformer using item [11]
Page 43 of 56
Power Integrations, Inc.
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