HIGH FREQUENCY TRANSFORMERS (403 series)

Very low EMI - High PCB packing densities - Standard gapped cores from stock - Design assistance from West Coast Magnetics - Adaptable to UL,CSA,VDE safety agency requirements - SMD mounting available for small sizes

WC Magnetics' 403 series transformers are ideal for switch mode power supply applications where very low emitted electromagnetic radiation is a priority. This type of transformer is also used in broadband small signal transmission applica-tions. The cubic shape of the 403 series core and bobbin provides exceptional shielding and facilitates high PCB packing densities.

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Notes:
1. Reduce power rating in Table above by 50% for forward and flyback converter topologies.
2. Final sizing of the transformer will depend on a number of interrelated variables. The data in the above table should be considered a starting point only.
3. If safety agency is required, the final size may be significantly larger than the data in the table would indicate.

Power Curve Assumptions:
1. Push/Pull circuit topology
2. Bobbin Window area utilization = 40%
3. Flux density (B) chosen so that core losses at all Frequencies are 100 mW/cm3.

PC Mount Switching Power Transformer

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Design Constants