Seagate Hawk 4XL Installation Manual page 18

16
Table 2. DC power requirements (Amps)
Voltage
Regulation [5]
Max. operating current
DC3 [1]
Avg. idle current DCX [1]
Max. starting current
(peak DC) DC3 [3]
(peak AC) AC3 [3]
Delayed motor start (max)
DC3 [1][4]
Peak operating current
Typical DCX [1][6]
Maximum DC3 [1]
Maximum (peak) 3
[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.
[3] For +12V current profile information, call Seagate technical
support services.
[4] This condition occurs when the Motor Start option is enabled
and the drive has not yet received a Start Motor command.
Hawk 4XL Installation Guide, Rev. A
ST34555N/W
Single-ended
+5V
±5%
0.81
0.46
0.78
0.48
0.75
0.81
1.5
+12V
±5%[2]
0.95
0.54
2.44
3.1
0.20
0.76
0.95
2.5