Seagate ST3250823AS Product Manual - Page 22
Typical current profiles, Table 4, DC power requirements
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Table 4: DC power requirements Power dissipation (typical) Spinup Idle Idle* (with offline activity) Operating (40% r/w, 40% seek, 20% inop.) Seeking (random, 20% idle) Standby Sleep Average (watts, 25° C) - 7.2 9.1 12.8 12.4 1.4 1.4 5V typ amps - 0.401 0.78 0.841 0.602 0.265 0.265 12V typ amps 2.8 (peak) 0.433 0.433 0.715 0.782 0.006 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. 2.8.1.1 Typical current profiles Figure 1. Typical 5V startup and operation current profile Figure 2. Typical 12V startup and operation current profile 14 Barracuda 7200.8 Serial ATA Product Manual, Rev. D
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14
Barracuda 7200.8 Serial ATA Product Manual, Rev. D
*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
.
2.8.1.1
Typical current profiles
Figure 1. Typical 5V startup and operation current profile
Figure 2. Typical 12V startup and operation current profile
Table 4:
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