Power and Signal Distribution

Table 7-2.

SFF 240-Watt Power Supply Unit Specifications

 

 

 

 

 

 

 

 

 

 

Min.

 

 

 

 

 

 

Range/

Current

Max.

Surge

Max.

 

Tolerance

Loading [1]

Current

Current

Ripple

 

 

 

 

 

 

 

 

 

Input Line Voltage

90–264 VAC

--

 

--

 

--

 

--

Line Frequency

47–63 Hz

--

 

--

 

--

 

--

Input (AC) Current

--

--

 

5.0

A

--

 

--

+3.3 VDC Output

+ 4%

0.1

A

15.0 A

15.0 A

50 mV

+5.08 VDC Output

+ 3.3 %

0.3 A

17.0 A

17.0 A

50 mV

+5.08 AUX Output

+ 3.3 %

0.0 A

3.0

A

3.5

A

50 mV

+12 VDC Output

+ 5 %

0.1

A

7.5

A

9.0

A

120 mV

+12 VDC Output (Vcpu)

+ 5 %

0.1

A

11.0 A

14.5 A

120 mv

--12 VDC Output

+ 10 %

0.0 A

0.15 A

0.15 A

200 mV

NOTES:

Total continuous power should not exceed 240 watts. Total surge power (<10 seconds w/duty cycle < 5 %) should not exceed 260 watts.

[1] The minimum current loading figures apply to a PS On start up only.

Figure 7-3 shows the power supply cabling for the SFF system.

 

 

 

P4

P7

P5

P2

P4, P5, P7

 

P2

 

3

P3

4

P11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

P3

P11

 

 

 

 

 

 

 

 

 

2

 

 

 

 

5 4 3 2 1

4

3

2

1

1

 

2

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13

 

 

 

P1

 

4

Power Supply

 

 

 

 

P1

 

 

 

 

 

 

 

24

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin

Pin

Pin

Conn

Pin 1

Pin 2

Pin 3

 

Pin 4

Pin 5

Pin 6

Pin 7

Pin 8

 

Pin 9

 

10

11

12

P1

+3.3

+3.3

RTN

 

+5

RTN

+5

RTN

 

POK

 

5AUX

 

+12

+12

3.3

P1 [1]

+3.3

-12

RTN

 

PS On

RTN

RTN

RTN

PS Det

 

+5

 

+5

+5

RTN

P2

+5

RTN

RTN

 

+12

 

 

 

 

 

 

 

 

 

 

 

P3

RTN

RTN

VccP

 

VccP

 

 

 

 

 

 

 

 

 

 

 

P4, 5,

+3.3

RTN

+5

 

RTN

+12

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P11

GND

nc

Ftach

 

Fcmd

 

 

 

 

 

 

 

 

 

 

 

All + and - values are VDC. RTN = Return (signal ground) sns = sense

GND = Power ground RS = Remote sense FC = Fan command FO = Fan off

FSpd = Fan speed FS = Fan Sink

POK = Power OK (power good)

VccP = +12 for CPU nc = not connected Ftach = Fan speed Fcmd = Fan command

[1] This row represents pins 13–24 of connector P1

Figure 7-3. SFF Power Cable Diagram

 

Technical Reference Guide

www.hp.com

7-3

Page 81
Image 81
HP dc7900 manual SFF 240-Watt Power Supply Unit Specifications, Min Range Current Max Surge Tolerance Loading Ripple

dc7900 specifications

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