Power and Signal Distribution

Table 7-1 lists the specifications of the external supply.

Table 7-1.

USDT 135-Watt Power Supply Unit Specifications

Parameter

 

Input Line Voltage Range

90–265 VAC

Line Frequency

47–63 Hz

Input Current, Maximum load @ 90 VAC

2.4 A

Output Voltage

19.5 VDC

Output Current, nominal load

3.5 A

Output Current, maximum load

6.9 A

Output Current, peak load (300 ms max) [1]

9.0 A

NOTES:

Total continuous power should not exceed 135 watts. Total surge power (<10 seconds w/duty cycle < 5 %) should not exceed 170 watts.

[1]Using 100 VAC input. The output voltage is allowed to drop to a minimum of 15 VDC during the transient period.

7.2.2SFF/CMT Power Distribution

The SFF and CMT form factors use a power supply unit contained within the system chassis. Figure 7-2 shows the block diagram for power generation in the SFF and CMT.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Front Bezel

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

System Board

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power Button

Power On

90 - 264 VAC

NOTE:

CPU, slots, Chipsets, Logic, & Voltage Regulators

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+3.3 VDC

5 AUX

+5 VDC

+12 VDC

+12 VccP

-12 VDC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+3.3 VDC

 

 

 

PS On

Fan

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+5 VDC

 

 

 

Spd [1]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+12 VDC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power Supply

Unit

Drives

[1] Not present on CMT.

Figure 7-2. SFF Power Generation, Block Diagram

Table 7-2 lists the specifications of the SFF power supply unit.

 

7-2

www.hp.com

Technical Reference Guide

Page 80
Image 80
HP dc7900 manual 2 SFF/CMT Power Distribution, Usdt 135-Watt Power Supply Unit Specifications

dc7900 specifications

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