Load Regulation
Load regulation refers to the regulation of output voltage changes in the event of load fluctuations. Especially in dynamic areas, the quality of a switched-mode power supply becomes apparent when it comes to keeping the output voltage as constant as possible even during violent changes in the output current. Especially with very small loads or with minimum input voltage and full load, very strong overshoots or even dips can occur in extreme cases, which may even lead to malfunctions or damage. Load regulation should be within 1% for 12 V, as well as for the slave rails (5 V and 3.3 V).
Load control does not look quite as good in the following evaluations, mainly because of the strong competition. I am satisfied with a deviation of 1%, which is the case at 5 V. Nevertheless, the power supply lands on the last place in this evaluation, and not only there. Well, it’s also complaining at the very highest level. But it is worth noting.
est | 12V | 5V | 3.3V | 5VSB | DC/AC (Watts) | Efficiency | Fan Speed (RPM) | PSU Noise (dB[A]) | Temps (In/Out) | PF/AC Volts |
10% | 5.252A | 1.965A | 1.969A | 0.993A | 84.998 | 88.345% | 371 | <6.0 | 40.23C | 0.966 |
12.072V | 5.088V | 3.352V | 5.037V | 96.212 | 44.48C | 114.85V | ||||
20% | 11.580A | 2.95A | 2.953A | 1.194A | 169.935 | 92.057% | 385 | <6.0 | 40.85C | 0.987 |
12.006V | 5.085V | 3.353V | 5.025V | 184.597 | 45.53C | 114.82V | ||||
30% | 18.237A | 3.443A | 3.448A | 1.397A | 254.941 | 93.29% | 389 | <6.0 | 41.13C | 0.992 |
12.002V | 5.082V | 3.35V | 5.01V | 273.28 | 46.36C | 114.8V | ||||
40% | 24.921A | 3.94A | 3.944A | 1.603A | 340.037 | 93.336% | 445 | 8.8 | 41.80C | 0.994 |
11.991V | 5.077V | 3.347V | 4.992V | 364.316 | 47.51C | 114.77V | ||||
50% | 31.245A | 4.927A | 4.935A | 1.808A | 424.837 | 92.969% | 497 | 12.4 | 42.37C | 0.995 |
11.981V | 5.074V | 3.344V | 4.979V | 456.968 | 48.62C | 114.73V | ||||
60% | 37.558A | 5.917A | 5.928A | 2A | 509.286 | 92.743% | 570 | 12.2 | 42.71C | 0.995 |
11.970V | 5.07V | 3.34V | 4.965V | 549.136 | 49.32C | 114.71V | ||||
70% | 43.946A | 6.91A | 6.925A | 2.223A | 594.652 | 92.215% | 652 | 15.8 | 43.17C | 0.995 |
11.959V | 5.066V | 3.336V | 4.949V | 644.848 | 50.27C | 114.67V | ||||
80% | 50.353A | 7.905A | 7.924A | 2.329A | 679.481 | 91.515% | 738 | 22.3 | 43.62C | 0.995 |
11.947V | 5.061V | 3.331V | 4.938V | 742.479 | 51.73C | 114.64V | ||||
90% | 57.168A | 8.402A | 8.413A | 2.435A | 764.871 | 90.811% | 1000 | 26.9 | 44.01C | 0.995 |
11.936V | 5.057V | 3.328V | 4.928V | 842.268 | 53.22C | 114.6V | ||||
100% | 63.734A | 8.903A | 8.933A | 3.069A | 849.706 | 89.959% | 1309 | 34.6 | 45.21C | 0.994 |
11.924V | 5.054V | 3.325V | 4.887V | 944.554 | 55.27C | 114.57V | ||||
110% | 70.176A | 9.902A | 10.028A | 3.072A | 934.305 | 89.139% | 1639 | 40.3 | 46.52C | 0.993 |
11.914V | 5.049V | 3.321V | 4.883V | 1048.144 | 57.45C | 114.54V | ||||
CL1 | 1.998A | 14.265A | 14.311A | 0.492A | 146.404 | 87.767% | 639 | 15.4 | 40.02C | 0.985 |
12.008V | 5.061V | 3.333V | 5.079V | 166.81 | 45.49C | 114.83V | ||||
CL2 | 1.998A | 23.069A | 0.989A | 0.491A | 146.395 | 86.492% | 664 | 16.1 | 41.44C | 0.985 |
12.010V | 5.054V | 3.336V | 5.093V | 169.259 | 48.57C | 114.82V | ||||
CL3 | 1.994A | 0.986A | 22.308A | 0.495A | 105.715 | 84.307% | 598 | 14.3 | 41.00C | 0.977 |
12.032V | 5.069V | 3.327V | 5.052V | 125.392 | 50.31C | 114.84V | ||||
CL4 | 70.342A | 0.987A | 0.991A | 0.498A | 849.889 | 90.609% | 986 | 26.7 | 45.03C | 0.994 |
11.929V | 5.068V | 3.331V | 5.023V | 937.979 | 55.99C | 114.58V |
Ripple Suppression (Ripple Suppression)
The ripple suppression is decent.
Test | 12V | 5V | 3.3V | 5VSB | Pass/Fail |
10% Load | 8.5 mV | 12.5 mV | 13.6 mV | 11.5 mV | Passport |
20% Load | 9.8 mV | 13.0 mV | 15.0 mV | 10.7 mV | Passport |
30% Load | 40.2 mV | 13.5 mV | 17.0 mV | 11.5 mV | Passport |
40% Load | 36.3 mV | 21.0 mV | 32.4 mV | 16.3 mV | Passport |
50% Load | 16.4 mV | 15.6 mV | 20.2 mV | 11.1 mV | Passport |
60% Load | 14.8 mV | 16.1 mV | 18.1 mV | 11.5 mV | Passport |
70% Load | 15.5 mV | 16.3 mV | 19.1 mV | 12.3 mV | Passport |
80% Load | 16.1 mV | 16.9 mV | 19.6 mV | 13.1 mV | Passport |
90% Load | 17.9 mV | 18.1 mV | 21.4 mV | 12.8 mV | Passport |
100% Load | 25.4 mV | 20.8 mV | 24.1 mV | 14.2 mV | Passport |
110% Load | 27.5 mV | 21.6 mV | 26.4 mV | 14.6 mV | Passport |
Crossload 1 | 13.0 mV | 15.1 mV | 19.5 mV | 12.6 mV | Passport |
Crossload 2 | 11.0 mV | 21.7 mV | 19.0 mV | 11.6 mV | Passport |
Crossload 3 | 9.3 mV | 13.6 mV | 16.9 mV | 10.9 mV | Passport |
Crossload 4 | 25.6 mV | 21.4 mV | 21.3 mV | 13.6 mV | Passport |
Transient Response
Transient response is the amount of deviation in the output voltage as a result of a change in load. If the load changes, the power supply cannot immediately adjust to the new conditions and thus supplies either too much or too little stored energy. The transient response is satisfactory.
20% Load – 20ms
Voltage | Before | After | Change | Pass/Fail |
12V | 12.018V | 11.899V | 0.99% | Passport |
5V | 5.089V | 4.989V | 1.97% | Passport |
3.3V | 3.359V | 3.227V | 3.92% | Passport |
5VSB | 5.029V | 4.957V | 1.43% | Passport |
50% Load -20ms
Voltage | Before | After | Change | Pass/Fail |
12V | 11.989V | 11.800V | 1.57% | Passport |
5V | 5.079V | 4.974V | 2.07% | Passport |
3.3V | 3.351V | 3.219V | 3.93% | Passport |
5VSB | 4.987V | 4.915V | 1.44% | Passport |
Transient Response ATX v3.0 & 12VHPWR Connector Tests
The power supply successfully passed all ATX v3.0 transient response tests. The 12V rail falls close to the lower limit of 11.04V, but keep in mind that I reached it with a 2600W load, and this is an SFX unit!
- 1 - Introduction, technical data and test report
- 2 - Unboxing, cables and protection circuits
- 3 - Teardown: topology, components, processing
- 4 - Load regulation, ripple suppression, transient response
- 5 - Hold-up time, timings, inrush-current
- 6 - Average efficiency and PF
- 7 - Noise and fan speed
- 8 - Summary and conclusion
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