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2.2 Output Ripple
2.3.1 Ripple regulation
2.3.2 Definition
The ripple voltage of the outputs shall be measured at the pins of the
output connector when terminated in the load impedance specified in
figure 1. Ripple and noise are measured at the connectors with a 0.1uF
ceramic capacitor and a 10uF electrolytic capacitor to simulate system
loading. Ripple shall be measured under any condition of line voltage,
output load, line frequency, operation temperature.
2.3.3 Ripple voltage test circuit
03
750W
Range
LOAD
1
+12V MAX
2
+5V MAX
3
+3.3V MAX
4
-12V MAX
5
+5VSB MAX
6
MIN LOAD
Parameter
+3.3V
+5V
+12V
-12V
+5VSB
Power Supply
AC Hot
AC Neutral
AC Ground
Figure 1. Ripple voltage test circuit
+12V
+5V
+3.3V
-12V
62.5
0.5
0.5
0.5
20
0.5
0.05
0.5
0.5
20
0.05
0.5
0.5
0.5
NA
NA
NA
0.5
0.5
0.5
Ripple & Noise
50
50
120
120
50
V out
10uF
0.1uF
V return
5VSB
unit
0
0.1
A
0.5
A
0.5
A
0.3
0.1
A
NA
3.0
A
0
0
A
Unit
mVp-p
mVp-p
mVp-p
mVp-p
mVp-p
Load
Scope
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