Physical/Electrical Specifications; Ac Power Requirements; Dc Power Requirements - Seagate ST15150N - Barracuda 4.3 GB Hard Drive Product Manual

ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D
7.0
7.1
7.2

Physical/electrical specifications

This section provides information relating to the physical and electrical
characteristics of Barracuda 4 drives.

AC power requirements

None.

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
[ 5 ]
Voltage regulation
Amps
Max operating current DC 3
Average idle current DC X
Max start current
(peak) DC 3
(peak) AC 3
Delay motor start (max) DC 3
Peak operating current
Typical DC X
Maximum DC 3
Maximum (peak) AC 3
Track following at
OD DC X
ID DC X
Read track
OD DC 3
AC 3
Seeking
Typical DC X
Maximum DC 3
Maximum (peak) AC 3
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.
N/W/WC
5V 12V
[ 11 ]
[ 2 ]
Notes 5% 5%
[1] 0.95 0.95
[1] [12] 0.63 0.78
[3] [6] 0.93 2.18
[3] — 3.10
[1] [4] 0.95 0.10
[1] [10] 0.92 0.86
[1] 0.95 0.95
1.08 1.8
[1] 0.91 0.80
[1] 0.89 0.86
[1] [14] 0.97 0.89
1.05 1.10
[1] [13] 0.91 1.10
[1] 0.92 1.20
1.05 1.87
33
ND/WD/DC
5V 12V
[ 11 ]
5% 5% [ 2 ]
1.19 0.95
0.69 0.78
1.02 2.18
— 3.10
0.94 0.10
1.13 0.86
1.19 0.95
1.95 1.8
0.97 0.80
0.96 0.86
1.39 0.89
1.96 1.10
0.98 1.10
1.02 1.20
1.7 1.87