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Chapter 6 Power and Signal Distribution
6.2.1 POWER SUPPLY ASSEMBLY
These systems feature auto-ranging power supplies with power factor-correction logic. The SFF
systems use a 175-watt supply while the desktop and configurable minitower systems employ a
250-watt supply. Tables 6-1 and 6-2 list the specifications of the power supplies.
Table 6–1. 175-Watt Power Supply Assembly Specifications
Table 6-1.
175-Watt Power Supply Assembly Specifications (PN 243891)
Range/
Tolerance
Min. Current
Loading [1]
Max.
Current
Surge
Current [2]
Max.
Ripple
Input Line Voltage:
115 - 230 VAC (auto-ranging)
90 - 264 VAC
--
--
--
--
Line Frequency 47 - 63 Hz -- -- -- --
Constant Input (AC) Current
-- -- 2.7 A -- --
+3.33 VDC Output +/- 6 % 0.6 A 12.0 A -- 50 mV
+5 VDC Output +/- 5 % 0.5 A 8.0 A -- 50 mV
+3.30 AUX Output +/- 5 % 1.0 A 1.0 A -- 50 mV
+5.05 AUX Output +/- 4 % 0.1 A 2.4 A -- 50 mV
+12 VDC Output +/- 3 % 0.0 A 3.0 A 4.5 A 120 mV
+12.8 VDC Output (Vcpu) +/- 12 % 0.1 A 7.5 A -- 120 mv
-12 VDC Output +/- 10 % 0.0 A 0.3 A -- 200 mV
N
must be met at all times to ensure normal operation
OTES:
[1] Minimum loading requirements
and specification compliance.
[2] Surge duration no longer than 10 seconds with 12-volt tolerance +/- 10%.
Table 6–2. 250-Watt Power Supply Assembly Specifications
Table 6-2.
250-Watt Power Supply Assembly Specifications (PN 243890)
Range/
Tolerance
Min. Current
Loading [1]
Max.
Current
Surge
Current [2]
Max.
Ripple
Input Line Voltage:
115 - 230 VAC Setting 90 - 264 VAC
--
--
--
--
Line Frequency 47 - 63 Hz -- -- -- --
Constant Input (AC) Current
-- -- 3.6 A -- --
+3.3 VDC Output +/- 5% 1.0 A 17.0 A 17.0 A 50 mV
+5 VDC Output +/- 5 % 1.0 A 11.0 A 11.0 A 50 mV
+3 AUX Output +/- 5 % 0.0 A 2.20 A 2.20 A 50 mV
+5 AUX Output +/- 4 % 0.0 A 1.70 A 1.70 A 50 mV
+12 VDC Output +/- 5 % 0.1 A 5.00 A 7.50 A 120 mV
+12.8 VDC Output (Vcpu) +/- 5 % 0.0 A 7.50 A 10.5 A 200 mv
-12 VDC Output +/- 10 % 0.0 A 0.15 A 0.15 A 200 mV
NOTES:
must be met at all times to ensure normal operation
[2] Surge duration no longer than 10 seconds with 12-volt tolerance +/- 10%.
[1] Minimum loading requirements
and specification compliance.
Compaq Evo and Workstation Personal Computers
Featuring the Intel Pentium 4 Processor
Second Edition- January 2003
6-2