Table 2:

DC power requirements

 

 

 

 

 

 

 

Power dissipation (typical)

Average (watts, 25° C)

5V typ amps

12V typ amps

 

 

 

 

 

Spinup

 

2.8 (peak)

 

 

 

 

 

Idle

 

7.2

0.401

0.433

 

 

 

 

Idle* (with offline activity)

9.1

0.78

0.433

 

 

 

 

 

Operating

(40% r/w, 40% seek, 20% inop.)

12.8

0.841

0.715

 

 

 

 

Seeking (random, 20% idle)

12.4

0.602

0.782

 

 

 

 

 

Standby

 

1.4

0.265

0.006

 

 

 

 

 

Sleep

 

1.4

0.265

0.006

 

 

 

 

 

*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational levels.

2.8.1.1Typical current profiles

Figure 1. Typical 5V startup and operation current profile

Figure 2. Typical 12V startup and operation current profile

NL35 Series SATA Product Manual, Rev. B

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Image 15
Seagate ST3400832NS, ST3250823NS, ST3250623NS, ST3400632NS manual DC power requirements, Typical current profiles