Seagate Cheetah 15K.6 FC ST3146356FC Product Manual page 32

Table 6: ST3146356FC DC power requirements
Voltage
Regulation
Avg idle current DCX
Maximum starting current
(peak DC) DC
(peak AC) AC
Delayed motor start (max) DC
Peak operating current:
Typical DCX
Maximum DC
Maximum (peak) DC
Table 7: ST3146756FC DC power requirements
Voltage
Regulation
Avg idle current DCX
Maximum starting current
(peak DC) DC
(peak AC) AC
Delayed motor start (max) DC
Peak operating current:
Typical DCX
Maximum DC
Maximum (peak) DC
[1] Measured with average reading DC ammeter. Instantaneous +12V current peaks will exceed these val-
ues. Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient.
[2] For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching
15000 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] See +12V current profile in Figure 1.
[4] This condition occurs when the Motor Start option is enabled and the drive has not yet received a Start
26
1 Gbit
Notes (Amps)
+5V
[5] ±5%
[1] [7] 0.53
3σ [3] 0.82
3σ [3] 1.11
3σ [1] [4] 0.62
[1] [6] 0.62
3σ [1] 0.64
3σ 1.12
1 Gbit
Notes (Amps)
+5V
[5] ±5%
[1] [7] 0.52
3σ [3] 0.60
3σ [3] 0.99
3σ [1] [4] 0.56
[1] [6] 0.50
3σ [1] 0.53
3σ 1.18
2 Gbit
(Amps) (Amps)
+12V [2] +5V
±5% [2] ±5%
0.53 0.56
1.75 0.68
3.42 0.95
0.04 0.64
0.96 0.65
0.96 0.65
2.34 1.16
2 Gbit
(Amps) (Amps) (Amps)
+12V [2] +5V +12V [2]
±5% [2] ±5% ±5% [2]
0.54 0.55 0.53
1.77 0.63 1.77
3.72 0.90 3.81
0.04 0.60 0.04
0.95 0.56 0.95
0.97 0.57 0.96
2.36 1.24 2.34
Cheetah 15K.6 FC Product Manual, Rev. C
4 Gbit
(Amps) (Amps) (Amps)
+12V [2] +5V +12V [2]
±5% [2] ±5% ±5% [2]
0.53 0.63 0.53
1.75 0.74 1.75
3.81 1.00 3.58
0.04 0.71 0.04
0.96 0.72 0.95
0.98 0.73 0.97
2.32 1.22 2.34
4 Gbit
(Amps) (Amps)
+5V +12V [2]
±5% ±5% [2]
0.60 0.53
0.94 1.77
1.25 3.93
0.65 0.04
0.62 0.95
0.62 0.97
1.32 2.34