Designing an SMPS Transformer

In designing a switch mode power supply, one of the most difficult but least understood elements is the transformer. ICE’s goal is to simplify the transformer design process and thereby shorten the design cycle time. The first step is to define the SMPS parameters. This should include the following items: input voltage, secondary power output for each winding, switching frequency, I peak and the maximum allowable duty cycle. You will also need to choose the type of switching topology that you plan to use. Refer to ICE’s application note on pg. 17 for more information on switching topologies.

Next is the easy part. 1 You can turn to page 21, fill out the SMPS custom design form and fax it to (678)560-9034 or 2 Follow the step-by-step procedure on the next page to design your own SMPS transformer. When finished, fill out the bottom section of the custom design form on page 21 and fax it in. That’s it, you’re done! ICE will provide a quotation and samples and you can move on to other aspects of your design.