1
2
Tape
Nc1 = 9 turns, 34 AWG
Nc2 = 9 turns, 34 AWG
Wound Bifilar Single Layer
5
Tape
Tape
Na1 = 13 turns, 34 AWG
Na2 = 13 turns 34 AWG
Wound Bifilar Single Layer
3
4
Tape
Np/2 = 26 Turns, 34 AWG, Single Layer
2
Bobbin Surface
Transformer Inner Core
Clockwise
Clockwise
Ns1 = 4 turns, 25 AWG Triple Insulated
Ns2 = 4 turns, 25 AWG Triple Insulated
Wound Bifilar Single Layer
FL1
FL2
Clockwise
3
Counter
Clockwise
Np/2 = 26 Turns, 34 AWG
20 Turns on one layer and 6 on the next
6
Clockwise
Pin
Pin
Start Winding
Finish Winding
Winding Direction
Transformer Outer Core
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Transformer Details
13
SLUUBU4B – March 2018 – Revised June 2018
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Copyright © 2018, Texas Instruments Incorporated
Using the UCC28742EVM-001 10-W Converter
Figure 23. Transformer Winding Structure
