How to Size and Build Switching Transformers | Testing a Planar Transformer

In this video I go through the main calculations to size transformers for SMPSs and I build a planar transformer with PCB windings and test it on a half bridge 250kHz converter.

I didn't talk about the advantages of planar transformers to avoid making a boring lecture video. In general though, they are:
Lower stray inductance, compact shape and size, and ease during assembly, particularly for interleaving windings.

Check out my video on building a half bridge converter:    • Building and Testing a Half Bridge SMPS  

Huge thanks to PCBWay for making this video possible!
Check them out at https://pcbway.com/g/nPngMb to order PCBs for your projects.
PCBWay gerber file viewer: https://www.pcbway.com/project/Online...

Music:
Kevin MacLeod - Lobby Time
Kevin MacLeod - Groove Grove
Kevin MacLeod - George Street Shuffle
Kevin MacLeod - Space Jazz

0:00 Intro
0:22 1) Losses in the copper windings
1:49 2) Limiting magnetizing current
2:12 3) Avoiding core saturation
2:45 4) Losses from magnetic hysteresis & eddy currents
3:11 Designing the PCB windings
3:36 Ordering the PCBs (sponsor)
4:32 Assembling the transformer
5:05 Test result: one sided PCB, single secondary
5:17 Test result: two sided PCB, single secondary
5:45 Test result: two sided PCB, double secondary
6:57 Outro