Cmt Power Distribution - HP Compaq dc7800 Series Technical Reference Manual

Power and Signal Distribution

7.2.3 CMT Power Distribution

The CMT form factor uses a power supply unit internal to the system chassis. Figure 7-4 shows
the block diagram for power generation in the CMT.
Front Bezel
Power Button
Power On
90 - 264 VAC
NOTE:
[1] Not present on CMT.
Figure 7-4. CMT Power Generation, Block Diagram
Table 7-3 lists the specifications for the 365-watt power supply used in the CMT form factor.
Input Line Voltage:
1 15–230 VAC (auto-ranging)
Line Frequency
Input (AC) Current
+3.3 VDC Output
+5.08 VDC Output
+5.08 AUX Output
+12 VDC Output
+12 VDC Output (Vcpu)
- 1 2 VDC Output
NOTES:
Total continuous output power should not exceed 365 watts. Maximum surge power should not exceed 385 watts.. Maximum
combined power of +5 and +3.3 VDC is 160 watts.
[1] Minimum loading requirements must be met at all times to ensure normal operation and specification compliance.
[2] Maximum surge duration for +12Vcpu is 1 second with 12-volt tolerance +/- 10%.
7-4
System Board
CPU, slots, Chipsets, Logic,
& Voltage Regulators
+3.3 VDC 5 AUX
Fan
PS On
Spd [1]
Power Supply
Table 7-3.
CMT 365-Watt Power Supply Unit Specifications
Range or
Tolerance
90–264 VAC
47–63 Hz
--
+ 4 %
+ 3.3 %
+ 3.3 %
+ 5 %
+ 5 %
+ 10 %
www.hp.com
+12 VDC +12 VccP
+5 VDC
Unit
Min.
Current Max.
Loading [1] Current
-- --
-- --
-- 6.0 A
0.10 A 24.0 A
0.30 A 19.0 A
0.00 A 3.00 A
0.20 A 12.0 A
0.00 A 14.5 A
0.00 A 0.15 A
-12 VDC
+3.3 VDC
+5 VDC
Drives
+12 VDC
Surge Max.
Current [2] Ripple
-- --
-- --
-- --
24.0 A 50 mV
19.0 A 50 mV
3.00 A 50 mV
14.5 A 120 mV
17.5 A 200 mv
0.15 A 200 mV
Technical Reference Guide