DER-110
Dual Output Non-Isolated Power Supply
October 26, 2005
6.4 Transformer Build Diagram
Figure 5 – Transformer Build Diagram
6.5 Transformer Construction
Start at pin 6 and wind 20 turns of bifilar wound #34. Do not connect finish
end of this winding.
Apply three layers of tape for basic insulation.
Start on pin 4, wind 108 turns of #33 in three layers. Apply one layer of
tape between each adjacent winding layer.
Core Shield
Basic Insulation
Primary
Basic Insulation
Apply two layers of tape for basic insulation.
Secondary Winding Start on pin 5, wind 6 turns of trifilar #27 in one layer. Finish on pin 6.
Secondary Winding Start on pin 8, wind 21 turns of #27 in one layer. Finish on pin 5.
Outer Wrap
Wrap windings with 3 layers of tape.
Assemble and secure core halves. Dip varnish, do not impregnate (item
[7]).
Final Assembly
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Page 9 of 23
POWERINT [ Power Integrations ]
