Seagate ST15150N Product Manual - Page 43

Physical/electrical specifications

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ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 33 7.0 Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of Barracuda 4 drives. 7.1 AC power requirements None. 7.2 DC power requirements The voltage and current requirements for a single drive are shown below. Values indicated apply at the drive's power connector. Table 1. DC power requirements for ST15150N/ND/W/WD/WC/DC drives Voltage regulation [5] Notes N/W/WC ±5V[11] ±12V ±5% ±5%[2] ND/WD/DC ±5V[11] ±12V ±5% ±5%[2] Amps Max operating current DC3σ [1] 0.95 0.95 1.19 0.95 Average idle current DC X [1] [12] 0.63 0.78 0.69 0.78 Max start current (peak) DC 3σ [3] [6] 0.93 2.18 1.02 2.18 (peak) AC 3σ [3] - 3.10 - 3.10 Delay motor start (max) DC 3σ [1] [4] 0.95 0.10 0.94 0.10 Peak operating current Typical DC X [1] [10] 0.92 0.86 1.13 0.86 Maximum DC 3σ Maximum (peak) AC 3σ [1] 0.95 0.95 1.19 0.95 1.08 1.8 1.95 1.8 Track following at OD DC X [1] 0.91 0.80 0.97 0.80 ID DC X [1] 0.89 0.86 0.96 0.86 Read track OD DC 3σ AC 3σ [1] [14] 0.97 0.89 1.05 1.10 1.39 0.89 1.96 1.10 Seeking Typical DC X [1] [13] 0.91 1.10 0.98 1.10 Maximum DC 3σ [1] 0.92 1.20 1.02 1.20 Maximum (peak) AC 3σ 1.05 1.87 1.7 1.87 Notes: [1] Measured with average reading DC ammeter. Instantaneous+12V current peaks will exceed these values. [2] A -10% tolerance is permissible during initial start of spindle and must return to ±5% before 7,200 RPM is reached. The ±5% must be maintained after the drive signifies that its power-up sequence has been completed and that the drive is able to accept selection by the host initiator. [3] See Figure 14.

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ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D
33
7.0
Physical/electrical specifications
This section provides information relating to the physical and electrical
characteristics of Barracuda 4 drives.
7.1
AC power requirements
None.
7.2
DC power requirements
The voltage and current requirements for a single drive are shown below.
Values indicated apply at the drive’s power connector.
Table 1.
DC power requirements for ST15150N/ND/W/WD/WC/DC
drives
N/W/WC
ND/WD/DC
±
5V
[11]
±
12V
±
5V
[11]
±
12V
Voltage regulation
[5]
Notes
±
5%
±
5%
[2]
±
5%
±
5%
[2]
Amps
Max operating current DC
3
σ
[1]
0.95
0.95
1.19
0.95
Average idle current DC X
[1]
[12]
0.63
0.78
0.69
0.78
Max start current
(peak) DC 3
σ
[3] [6]
0.93
2.18
1.02
2.18
(peak) AC 3
σ
[3]
—
3.10
—
3.10
Delay motor start (max) DC
3
σ
[1] [4]
0.95
0.10
0.94
0.10
Peak operating current
Typical DC X
[1]
[10]
0.92
0.86
1.13
0.86
Maximum DC
3
σ
[1]
0.95
0.95
1.19
0.95
Maximum (peak) AC
3
σ
1.08
1.8
1.95
1.8
Track following at
OD DC X
[1]
0.91
0.80
0.97
0.80
ID DC X
[1]
0.89
0.86
0.96
0.86
Read track
OD DC
3
σ
[1] [14]
0.97
0.89
1.39
0.89
AC
3
σ
1.05
1.10
1.96
1.10
Seeking
Typical DC X
[1]
[13]
0.91
1.10
0.98
1.10
Maximum DC
3
σ
[1]
0.92
1.20
1.02
1.20
Maximum (peak) AC
3
σ
1.05
1.87
1.7
1.87
Notes:
[1]
Measured with average reading DC ammeter. Instantaneous
+
12V current
peaks will exceed these values.
[2]
A –10% tolerance is permissible during initial start of spindle and must
return to
±
5% before 7,200 RPM is reached. The
±
5% must be maintained
after the drive signifies that its power-up sequence has been completed
and that the drive is able to accept selection by the host initiator.
[3]
See Figure 14.