Load Regulation
Load regulation is the regulation of output voltage changes in the event of load fluctuations. The quality of a switched-mode power supply is particularly evident in dynamic areas when it comes to keeping the output voltage as constant as possible even during sharp changes in the output current. Particularly with very small loads or at minimum input voltage and full load, very strong overshoots or even dips can occur in extreme cases, which can even lead to malfunctions or damage under certain circumstances. The load regulation should be within 1 % at 12 V, as well as for the auxiliary rails (5 V and 3.3 V). Load regulation is very good at 12 V, which is the most important, but only mediocre on the other rails.
Test | 12V | 5V | 3.3V | 5VSB | DC/AC (Watts) | Efficiency | Fan Speed (RPM) | PSU Noise (dB[A]) | Temps (In/Out) | PF/AC Volts |
10% | 5.233A | 2.01A | 1.999A | 0.984A | 85.008 | 88.735% | 0 | <6.0 | 44.49C | 0.977 |
12.116V | 4.977V | 3.302V | 5.083V | 95.8 | 40.48C | 115.16V | ||||
20% | 11.482A | 3.018A | 3.005A | 1.184A | 169.979 | 91.136% | 0 | <6.0 | 45.01C | 0.985 |
12.112V | 4.971V | 3.295V | 5.071V | 186.51 | 40.67C | 115.14V | ||||
30% | 18.081A | 3.526A | 3.513A | 1.384A | 254.99 | 91.713% | 916 | 27.1 | 41.18C | 0.991 |
12.108V | 4.965V | 3.288V | 5.059V | 278.034 | 45.95C | 115.11V | ||||
40% | 24.694A | 4.033A | 4.023A | 1.586A | 340.081 | 91.709% | 916 | 27.1 | 41.76C | 0.993 |
12.103V | 4.96V | 3.281V | 5.047V | 370.824 | 46.79C | 115.09V | ||||
50% | 30.956A | 5.048A | 5.042A | 1.788A | 425.097 | 91.272% | 916 | 27.1 | 42.28C | 0.994 |
12.100V | 4.954V | 3.273V | 5.034V | 465.745 | 47.82C | 115.07V | ||||
60% | 37.186A | 6.066A | 6.065A | 1.992A | 509.632 | 90.51% | 1245 | 33.7 | 42.77C | 0.994 |
12.097V | 4.947V | 3.265V | 5.021V | 563.068 | 48.79C | 115.04V | ||||
70% | 43.483A | 7.086A | 7.093A | 2.197A | 594.964 | 89.614% | 1609 | 41.5 | 43.19C | 0.994 |
12.093V | 4.941V | 3.257V | 5.008V | 663.921 | 50.21C | 115.02V | ||||
80% | 49.786A | 8.109A | 8.126A | 2.301A | 679.808 | 88.822% | 1863 | 44.6 | 43.77C | 0.995 |
12.089V | 4.933V | 3.249V | 4.998V | 765.358 | 51.86C | 114.99V | ||||
90% | 56.493A | 8.626A | 8.637A | 2.406A | 765.264 | 88% | 2091 | 47.2 | 44.48C | 0.995 |
12.086V | 4.928V | 3.242V | 4.988V | 869.614 | 53.54C | 114.96V | ||||
100% | 62.931A | 9.146A | 9.183A | 3.023A | 850.078 | 86.993% | 2175 | 47.6 | 45.42C | 0.994 |
12.082V | 4.921V | 3.234V | 4.962V | 977.18 | 55.51C | 114.93V | ||||
110% | 69.241A | 10.177A | 10.324A | 3.028A | 934.666 | 85.855% | 2173 | 47.6 | 46.75C | 0.994 |
12.079V | 4.914V | 3.225V | 4.954V | 1088.655 | 57.69C | 114.92V | ||||
CL1 | 0.116A | 12.14A | 12.107A | 0A | 101.318 | 83.701% | 921 | 27.2 | 40.46C | 0.978 |
12.112V | 4.959V | 3.279V | 5.104V | 121.048 | 45.98C | 115.15V | ||||
CL2 | 0.116A | 20.184A | 0A | 0A | 101.407 | 81.995% | 932 | 27.7 | 40.58C | 0.978 |
12.113V | 4.954V | 3.3V | 5.109V | 123.675 | 47.61C | 115.15V | ||||
CL3 | 0.116A | 0A | 20.181A | 0A | 67.398 | 77.349% | 914 | 27.0 | 40.07C | 0.978 |
12.108V | 4.974V | 3.27V | 5.102V | 87.138 | 49.16C | 115.16V | ||||
CL4 | 70.352A | 0A | 0A | 0A | 849.798 | 87.788% | 2183 | 47.7 | 45.23C | 0.994 |
12.080V | 4.94V | 3.257V | 5.062V | 968.017 | 56.19C | 114.94V |
Ripple suppression (residual ripple suppression)
Ripple suppression is good on all rails.
Test | 12V | 5V | 3.3V | 5VSB | Pass/Fail |
10% Load | 7.7 mV | 7.4 mV | 4.6 mV | 8.3 mV | Pass |
20% Load | 8.2 mV | 7.9 mV | 5.0 mV | 9.3 mV | Pass |
30% Load | 9.9 mV | 9.3 mV | 6.1 mV | 10.5 mV | Pass |
40% Load | 11.2 mV | 10.2 mV | 6.8 mV | 10.3 mV | Pass |
50% Load | 12.8 mV | 10.5 mV | 7.3 mV | 11.4 mV | Pass |
60% Load | 14.9 mV | 10.9 mV | 8.3 mV | 11.9 mV | Pass |
70% Load | 16.0 mV | 12.0 mV | 9.4 mV | 12.5 mV | Pass |
80% Load | 16.1 mV | 13.9 mV | 13.2 mV | 13.6 mV | Pass |
90% Load | 17.2 mV | 13.8 mV | 14.1 mV | 16.1 mV | Pass |
100% Load | 23.8 mV | 15.4 mV | 15.6 mV | 18.2 mV | Pass |
110% Load | 25.1 mV | 17.3 mV | 16.2 mV | 20.9 mV | Pass |
Crossload 1 | 15.3 mV | 15.0 mV | 12.7 mV | 20.3 mV | Pass |
Crossload 2 | 11.0 mV | 16.9 mV | 7.7 mV | 19.9 mV | Pass |
Crossload 3 | 13.7 mV | 11.9 mV | 14.8 mV | 17.6 mV | Pass |
Crossload 4 | 20.6 mV | 10.5 mV | 10.6 mV | 16.4 mV | Pass |
Transient response (transient behavior)
The transient response is good at 12 V, but needs to be improved on the smaller rails, especially at 3.3 V, where the device fails the second test as the voltage drops below 3.14 V.
20% Load – 20ms
Voltage | Before | After | Change | Pass/Fail |
12V | 12.092V | 11.961V | 1.08% | Pass |
5V | 4.973V | 4.821V | 3.05% | Pass |
3.3V | 3.294V | 3.147V | 4.45% | Pass |
5VSB | 5.066V | 5.022V | 0.86% | Pass |
50% Load -20ms
Voltage | Before | After | Change | Pass/Fail |
12V | 12.083V | 11.970V | 0.93% | Pass |
5V | 4.956V | 4.820V | 2.75% | Pass |
3.3V | 3.273V | 3.121V | 4.64% | Fail |
5VSB | 5.029V | 4.986V | 0.85% | Pass |
Transient Response ATX v3.x Tests
The power supply passes all ATX v3.0 transient response tests, but the 3.3 V rail drops low in the 200% load test.
The 12 V rail performs well in these tests and drops to 11.5 V in the 200% load test.
- 1 - Introduction, overview and technical data
- 2 - Unboxing, cables and protective circuits
- 3 - Teardown: Topology, components, workmanship
- 4 - Load Regulation, Ripple Suppression, Transient Resonse
- 5 - Hold-Up Time, Timings, Inrush-Current
- 6 - Average Efficiency and PF
- 7 - Fan curves and noise
- 8 - Summary and conclusion
23 Antworten
Kommentar
Lade neue Kommentare
Urgestein
1
Veteran
Urgestein
Urgestein
Urgestein
1
Veteran
Urgestein
Urgestein
Urgestein
1
Urgestein
1
Urgestein
Urgestein
Urgestein
1
Urgestein
Alle Kommentare lesen unter igor´sLAB Community →