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