Efficiency
The minimum efficiency of power supply should be over than 82% under the 100% load and 20% load. And should be over 85% under the 50% load. Load measurements are performed at 100-240Vac/50Hz input.
Efficiency test condition as below:
Load | +5V | +3.3V | +12V | -12V | +5Vs | Total (W) | EFF% |
20%. Load | 2 | 2 | 6.8 | 0.06 | 0.4 | 100W | 82% |
50%. Load | 5 | 5 | 17 | 0.15 | 1 | 250W | 85% |
100%. Load | 10 | 10 | 34 | 0.3 | 2.0 | 500W | 82% |
Output Requirements
DC Load Requirements
Output Voltage | MIN | MAX | Combined | Total |
+5V | 0.2A | 10A | 100W | 500W |
+3.3V | 0.1A | 10A |
+12V | 0.6A | 34A | 450W |
-12V | 0.0A | 0.3A | 3.6W |
+5Vsb | 0.05A | 2.0A | 10W |
Cross Regulation
The cross regulation is defined in the matrix below:
Load | +5V | +3.3V | +12V | -12V | +5Vs | Remark |
(1) | 6 | 10 | 5 | 0.3 | 2.0 | +3.3V Max |
(2) | 10 | 3 | 6 | 0.3 | 2.0 | +5V Max |
(3) | 5 | 0.5 | 34 | 0.3 | 1.0 | +12V Max |
(4) | 10 | 10 | 34 | 0.3 | 2.0 | Full load |
(5) | 5.0 | 5.0 | 17 | 0.15 | 1.0 | Half load |
(6) | 0.2 | 0.1 | 0.6 | 0.0 | 0.05 | Min load |
Protections
Over Voltage Protection
UVP Min. Typ. Max.
12V 13.2V 13.8V 14.4V
5V 5.7V 6.1V 6.5V
3.3V 3.7V 3.9V 4.1V
Over Current Protection
The power supply should provide +5V, +3.3Vand +12V OCP and should shutdown of each output power. For testing purposes, the overload currents of each tested output rail should be ramped at a minimum rate of 10A/sec.
Short Circuit Protection
The short circuit placed on +3.3V, +5V, + 12V and –12V output shall cause no damage and the power supply shall shut down and latch.
Protection Reset
When the power supply latches into shutdown condition due to a fault on output (Over-Current, Over-Voltage, Short circuit), the protection latch must reset at after the fault has been removed and the on/off signal has switched state.
Over Power Protection
The power supply shall be shut down and latch off, if the wattage of the power supply is higher from 550W to 750W.
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