Datasheet

Page8
3.12 Capacitive Load
The power supply should be able to power up and operate normally with
the following capacitances simultaneously present on the DC outputs. This
capacitive loading should be used to check all of function test, but without
hold-up time.
Output
ATX12V
Capacitive load (uF)
+12 V1 5000
+12 V2 3000
+5 V 6000
+3.3 V 6000
-12 V 350
+5 VSB 350
3.13 Closed-loop Stability
The power supply shall be unconditionally stable under all
line/load/transient load conditions including capacitive loads specified in
Section 3.13. A minimum of 45 degrees phase margin and 10 dB gain margin
is recommended at both the maximum and minimum loads.
4.0 Physical Environment
4.1 Temperature
4.1.1 Operating Ambient: +0 to 25℃
The power supply shall be capable of continuous operation and meet all
electrical specification. The maximum continuous power rating of supply is :
350W at 25℃. De-rate 2 W/℃,300W at 50℃.
(Burn-in condition: 300W load at 50℃)
4.1.2 Non-Operating Ambient(Storage): －40℃ to +70℃
4.2 Humidity
4.2.1 Operating: To 85% relative humidity (non-condensing)
4.2.2 Non-Operating: To 95% relative humidity (non-condensing)
Note: 95%RH is achieved with a dry bulb temperature of 55℃ and a wet bulb
temperature of 54℃.
4.3 Altitude
4.3.1 Operating: To 10,000ft
4.3.2 Non-Operating: To 50,000ft