Ripple Measurements
In the following table you will find the ripple levels that we measured on the main rails of SF-500P14PE. According to ATX specification the limits are 120 mV (+12V) and 50 mV (5V, 3.3V and 5VSB).
Ripple Measurements Super Flower SF-500P14PE |
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Test | 12 V | 5 V | 3.3 V | 5VSB | Pass/Fail |
20% Load | 11.5 mV | 8.0 mV | 10.0 mV | 5.4 mV | Pass |
40% Load | 15.5 mV | 9.3 mV | 12.3 mV | 5.5 mV | Pass |
50% Load | 18.0 mV | 10.1 mV | 13.6 mV | 6.1 mV | Pass |
60% Load | 18.6 mV | 11.4 mV | 15.9 mV | 6.6 mV | Pass |
80% Load | 25.0 mV | 14.2 mV | 17.9 mV | 7.7 mV | Pass |
100% Load | 30.9 mV | 16.6 mV | 20.9 mV | 9.0 mV | Pass |
Crossload 1 | 21.3 mV | 12.8 mV | 18.9 mV | 7.4 mV | Pass |
Crossload 2 | 25.2 mV | 12.3 mV | 13.3 mV | 6.8 mV | Pass |
Apparently this platform is ripple proof and this is clearly reflected in the results of the table above. The +12V rail registered a little ripple beyond 30mV at full load while the minor rails stayed close to 20mV. Ripple at 5VSB is simply nonexistent with only 9mV at full load. Well done Super Flower; good job here, too.
Ripple at Full Load
In the following oscilloscope screenshots you can see the AC ripple and noise that the main rails registered (+12V, 5V, 3.3V and 5VSB). The bigger the fluctuations on the oscilloscope's screen the bigger the ripple/noise. For all measurements we set 0.01 V/Div (each vertical division/box equals to 0.01V) as standard.
Ripple at Crossload 1
Ripple at Crossload 2