How Using Dummy Load When Testing Can Affect Efficiency Of VR
04/25/2012 7:33 AM
Please share your knowledge or experience, how using a dummy load when doing a test (SAT) to a VR (voltage regulator) can affect to its efficiency, and how much the difference in result (average) compare to when it is tested using actual load.
We are using a VR which in its data sheet stated that the efficiency is >85%.
But when we do individual testing on it, the efficiency only reach 70%. We used dummy load.
Re: How Using Dummy Load When Testing Can Affect Efficiency Of VR
04/25/2012 4:50 PM
OK, what kind of VR are you using?
What is your dummy load? Is it purely resistive or does it made with wire around some core? Is inductance part of the issue? (I guess that depends on the answer to the first question.)
Is your SAT test a saturation of a transformer?
You know, one of the reasons people won't answer some of these questions is because there is insufficient description of what you are talking about. We can't see what you are holding in your hand......(unless you insert it as a picture)
A great troubleshooting tip...."When you eliminate the impossible, whatever remains, however improbable, must be the truth." Sir Arthur Conan Doyle