Seagate barracuda 4lp st32171n-w-wc-wd-dc Benutzerhandbuch
Barracuda 4LP Installation Guide, Rev. B
15
Table 2b.
DC power requirements (Amps)
[1] Measured with an average reading DC ammeter. Instanta-
neous +12V current peaks will exceed these values.
[2] A –10% droop is permissible during initial start of the spindle
but must return to ±5% before reaching 7,200 RPM. 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.
±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 the +12V current profile in the
Barracuda 4LP Product
Manual (publication number 77767491).
[4] This condition occurs when the Motor Start option is enabled
and the drive has not yet received a Start Motor command.
ST32171/ST32271
N/W/WC
Single-ended
N/W/WC
Single-ended
WD/DC
Differential
Differential
Voltage
+5V
+12V
+5V
+12V
Regulation [5]
±5%
±5% [2]
±5%
±5%[2]
Max. operating current
DC3
σ
0.81
0.85
1.21
0.85
Avg. idle current DCX [1]
0.46
0.52
0.70
0.52
Max. starting current
(peak DC) DC3
σ
(peak AC) AC3
σ
0.78
2.00
3.1
3.1
1.1
2.00
3.1
3.1
Delayed motor start (max)
DC3
σ
0.50
0.20
0.90
0.20
Peak operating current
Maximum (peak) 3
σ
0.72
0.81
1.5
0.81
1.5
0.73
0.85
2.3
0.85
2.3
0.91
1.21
2.0
1.21
2.0
0.73
0.85
2.3
0.85
2.3