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B.2 -48 V
DC
The following specifications describe the physical and electrical charac-
teristics of a 310 W, four output, DC to DC switching power supply
housed in a standard size PS/2 casing.
B.2.1 Specifications
Input voltage:
Input current:
Inrush current:
Efficiency:
Output characteristics:
Output
voltage
+3.3V
+5V
+12V
-5V
-12V
+5V sb
Table B.1: -48 V
Note 1:
Note 2:
power supply
36~72V (continuous operation)
-48 VDC (normal operation)
10 A max. @ -48 V
5 A max. @ -48 V
70% min. @ full load and normal line voltage
Max Load
25A(Max. 150W)
30A(Max. 150W)
12A
.5A
1A
1A
power supply output characteristics
DC
Total regulation tolerance includes temperature
change, warmup drift and dynamic load.
Ripple and noise were measured differentially
at the power supply using loads that were each
shunted by at least a 0.1 m F ceramic disc
capacitor and a 10 m F electrolytic capacitor,
each capacitor having a bandwidth up to 20
MHz.
input
DC
input
DC
Total Max. Output
29
250W
Appendix B
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