DfR Solutions Reliability Designed and Delivered

Common Issues with Power Supply Design: Part 2

Posted by Ron Wunderlich on Jul 18, 2016 5:51:46 PM

This is the continuation of a series of white papers on the common problems seen with power supply designs, with a focus on inductors.

You can see that selecting an inductor is not as straight forward as it appears. The data vendors give is for DC operation but for switching power supplies you will have an AC component to the current. This will result in a higher temperature rise than expected. Then there is the issue of saturating the inductor which also can cause a temperature rise in the inductor and even possibly damage to the power supply.


Topics: DCR, Saturation Current, Failure Analysis, inductors

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