Seagate ST3300655LC Cheetah 15K.6 FC Product Manual - Page 32

Table 6, ST3146356FC, DC power requirements, Notes, Table 7, ST3146756FC

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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 Notes [5] [1] [7] 1 Gbit (Amps) +5V ±5% 0.53 2 Gbit (Amps) (Amps) +12V [2] +5V ±5% [2] ±5% 0.53 0.56 4 Gbit (Amps) (Amps) +12V [2] +5V ±5% [2] ±5% 0.53 0.63 (Amps) +12V [2] ±5% [2] 0.53 3σ [3] 0.82 1.75 0.68 1.75 0.74 1.75 3σ [3] 1.11 3.42 0.95 3.81 1.00 3.58 3σ [1] [4] 0.62 0.04 0.64 0.04 0.71 0.04 [1] [6] 0.62 0.96 0.65 0.96 0.72 0.95 3σ [1] 0.64 0.96 0.65 0.98 0.73 0.97 3σ 1.12 2.34 1.16 2.32 1.22 2.34 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 Notes [5] [1] [7] 3σ [3] 3σ [3] 3σ [1] [4] [1] [6] 3σ [1] 3σ 1 Gbit (Amps) +5V ±5% 0.52 0.60 0.99 0.56 0.50 0.53 1.18 (Amps) +12V [2] ±5% [2] 0.54 2 Gbit (Amps) +5V ±5% 0.55 4 Gbit (Amps) (Amps) +12V [2] +5V ±5% [2] ±5% 0.53 0.60 1.77 0.63 1.77 0.94 3.72 0.90 3.81 1.25 0.04 0.60 0.04 0.65 0.95 0.56 0.95 0.62 0.97 0.57 0.96 0.62 2.36 1.24 2.34 1.32 (Amps) +12V [2] ±5% [2] 0.53 1.77 3.93 0.04 0.95 0.97 2.34 [1] Measured with average reading DC ammeter. Instantaneous +12V current peaks will exceed these values. 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 Cheetah 15K.6 FC Product Manual, Rev. D

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26
Cheetah 15K.6 FC Product Manual, Rev. D
[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
Table 6:
ST3146356FC
DC power requirements
1 Gbit
2 Gbit
4 Gbit
Notes
(Amps)
(Amps)
(Amps)
(Amps)
(Amps)
(Amps)
Voltage
+5V
+12V [2]
+5V
+12V [2]
+5V
+12V [2]
Regulation
[5]
±5%
±5% [2]
±5%
±5% [2]
±5%
±5% [2]
Avg idle current DCX
[1] [7]
0.53
0.53
0.56
0.53
0.63
0.53
Maximum starting current
(peak DC) DC
3
σ
[3]
0.82
1.75
0.68
1.75
0.74
1.75
(peak AC) AC
3
σ
[3]
1.11
3.42
0.95
3.81
1.00
3.58
Delayed motor start (max) DC
3
σ
[1] [4]
0.62
0.04
0.64
0.04
0.71
0.04
Peak operating current:
Typical DCX
[1] [6]
0.62
0.96
0.65
0.96
0.72
0.95
Maximum DC
3
σ
[1]
0.64
0.96
0.65
0.98
0.73
0.97
Maximum (peak) DC
3
σ
1.12
2.34
1.16
2.32
1.22
2.34
Table 7:
ST3146756FC
DC power requirements
1 Gbit
2 Gbit
4 Gbit
Notes
(Amps)
(Amps)
(Amps)
(Amps)
(Amps)
(Amps)
Voltage
+5V
+12V [2]
+5V
+12V [2]
+5V
+12V [2]
Regulation
[5]
±5%
±5% [2]
±5%
±5% [2]
±5%
±5% [2]
Avg idle current DCX
[1] [7]
0.52
0.54
0.55
0.53
0.60
0.53
Maximum starting current
(peak DC) DC
3
σ
[3]
0.60
1.77
0.63
1.77
0.94
1.77
(peak AC) AC
3
σ
[3]
0.99
3.72
0.90
3.81
1.25
3.93
Delayed motor start (max) DC
3
σ
[1] [4]
0.56
0.04
0.60
0.04
0.65
0.04
Peak operating current:
Typical DCX
[1] [6]
0.50
0.95
0.56
0.95
0.62
0.95
Maximum DC
3
σ
[1]
0.53
0.97
0.57
0.96
0.62
0.97
Maximum (peak) DC
3
σ
1.18
2.36
1.24
2.34
1.32
2.34