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

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.

7.3SFF/CMT Power Distribution

The SFF and CMT form factors use a common power source 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

Power Button

System Board

P3

3 4

Power Control Logic, DC/DC Converter

 

 

 

Power On

& Voltage Regulators

 

 

1

2

 

 

 

 

 

 

 

P1

 

 

P2

 

 

P3

P2

+12 Vmain

+12 Vsb

-12 V

PS

Fan

Fan

Pwr

+12 Vcpu

 

On

Cmd

Spd

Good

 

 

 

 

 

 

 

 

 

6 5 4 3 2 1

 

 

 

 

 

 

 

 

P1

4 6

90 - 264 VAC

 

Power Supply Unit

 

 

 

 

1 3

NOTE: Return (RTN or ground) not shown.

Conn

Pin 1

Pin 2

Pin 3

Pin 4

Pin 5

Pin 6

P1

RTN

RTN

12 V

+12 Vmain

+12 Vmain

+12 Vsb

P2

FANcmd

Fan Speed

PS On

Pwr Good

RTN

RTN

P3

RTN

RTN

+12 Vcpu

+12 Vcpu

 

 

NOTES:

Connectors not shown to scale.

All + and values are VDC.

RTN = Return (signal ground)

Figure 7-2. SFF/CMT Power Distribution and Cabling, Block Diagram

 

7-2

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Technical Reference Guide

Page 76
Image 76
HP 8000 tower manual 7.3 SFF/CMT Power Distribution, 1 lists the specifications of the external supply