7-8
Compaq Professional Workstation AP550 Maintenance and Service Guide
375-W Power Supply
Table 7-6
375-W Power Supply Specifications
Input specifications Low Range High Range
Rated input voltage 100 VAC to 120 VAC 200 VAC to 240 VAC
Rated input current 8 A 4 A
Rated input frequency 50 to 60 Hz 50 to 60 Hz
General specifications
Input power 650W 650W
Holdup time 16 ms from zero crossing at
115 VAC
16 ms from zero crossing at
230 VAC
Full output rating
To 40
°
C and 5,000 ft
To 32
°
C and 10,000 ft (derate
linearly)
Minimum load
1.5A on + 5V and +3.3V outputs;
0.2A on +12V
Ambient temperature range
Operating
50
°
to 104
°
F10
°
to 40
°
C
Storage
-40
°
to 149
°
F-40
°
to 65
°
C
Safety standard UL 1950 3
rd
edition; CSA 22.2 No. 950 3
rd
edition, EN 60 950
Input transient susceptibility
Surge-tolerant power supply
(superimposed on AC line)
2000V surge per IEC1000-4-5 with no abnormal operation
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