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16 Hawk 4XL Installation Guide, Rev. A
Table 2. 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.
[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.
ST34555N/W
Single-ended
Voltage +5V +12V
Regulation [5] ±5% ±5%[2]
Max. operating current
DC3σ [1] 0.81 0.95
Avg. idle current DCX
[1] 0.46 0.54
Max. starting current
(peak DC) DC3σ [3]
(peak AC) AC3σ [3]
0.78 2.44
3.1
Delayed motor start (max)
DC3σ [1][4] 0.48 0.20
Peak operating current
Typical DCX
[1][6]
Maximum DC3σ [1]
Maximum (peak) 3σ
0.75
0.81
1.5
0.76
0.95
2.5