Cross-Load Tests And Infrared Images
Our cross-load tests are described in detail here.
To generate the following charts, we set our loaders to auto mode through our custom-made software before trying more than 1500 possible load combinations with the +12V, 5V and 3.3V rails. The load regulation deviations in each of the charts below were calculated by taking the nominal values of the rails (12V, 5V and 3.3V) as point zero.
Load Regulation Charts
As you can see from the charts above, at normal ambient temperatures, all major rails have good ripple suppression. The 5VSB rail had higher ripple compared to the results we got from our hot-box tests. However ripple suppression on this rail isn't as important so long as it's within spec.
Toward the end of the cross-load tests, we took some photos of the PSU with our modified FLIR E4 camera that delivers 320x240 IR resolution (76,800 pixels).
The PSU had a hard time inside our hot-box once we cranked up the heat. We spotted certain internal components operating at close to 90 °C. That sounds high; however, most parts inside a PSU are designed to operate even under higher temperatures if needed.