DER-46
6 W peak, Multiple output PSU for DVB-T
April 20, 2005
7.5 Winding Instructions
Bobbin Set Up
Orientation
Set up the bobbin with its pins oriented to the right hand side.
WDG1: SHLD1
Winding
Start at pin 10. Wind 48 turns of magnetic wire #35AWG from right to left. No
winding should overlap. Finish at pin 9.
Basic Insulation
Apply 2 layers of tape (8.2mm)
Start at pin 8. Wind 58 turns of magnetic wire #37AWG from right to left.
Place 1T of tape (8.2mm). Continue winding 58 turns from left to right for the
second layer. No winding should overlap. Finish on pin 7.
Apply 1 layer of tape (8.2mm)
WDG2: Primary
Winding (2 layers)
Basic Insulation
Start on pin 10 temporarily. Wind 16 bifilar turns of magnetic wire #32AWG
from right to left. No winding should overlap. Finish on pin 7. Cut trim start
lead from pin 10.
WDG3: SHLD2
Winding
Basic Insulation
Apply 4 layers of tape (8.2mm)
WDG4: 3.3 V
Winding.
WDG5: 5V
Winding
Start at pin 6. Wind 4 bifilar turns of T.I.W#25AWG. The wires should be
tightly and uniformly wound spread across the bobbin width. Finish on pin 5.
Start on pin 3. Wind 2 turns of T.I.W#25AWG. Wind the wire between 3.3V
windings. Finish on pin 6.
Basic Insulation
WDG6: 12V
Winding
Apply 1 layer of tape (8.2mm)
Start at pin 2. Wind 8 turns of T.I.W#32AWG. Wind uniformly spread across
the bobbin. Finish at pin 3.
Basic Insulation
WDG7: 33V
Winding
Apply 1 layer of tape (8.2mm)
Start at pin 1. Wind 19 turns of T.I.W#32AWG. Finish on pin 2.
Basic Insulation
Core Assembly
Apply 1 layer of tape (8.2mm)
Assemble and secure core halves. Item [1]
Power Integrations
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