03.Flyback Transformer Design for TOPSwitch Power Supplies

When developing TOPSwitch flyback power supplies,transformer design is usually the biggest stumbling block.Flyback transformers are not designed or used like normal transformers. Energy is stored in the core. The core must be gapped. Current effectively flows in either the primary or secondary winding but never in both windings at the same time.



Flyback Transformer Design For
TOPSwitch Power Supplies
Application Note AN-17
When developing TOPSwitch flyback power supplies, total flyback component cost is lower when compared to other
transformer design is usually the biggest stumbling block. techniques. Between 75 and 100 Watts, increasing voltage and
Flyback transformers are not designed or used like normal current stresses cause flyback component cost to increase
transformers. Energy is stored in the core. The core must be significantly. At higher power levels, topologies with lower
gapped. Current effectively flows in either the primary or voltage and