Seagate ST3300457FC Cheetah 15K.5 SAS Product Manual - Page 30

Table 3, DC power requirements, Table 4

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Table 3: ST3146855SS DC power requirements Voltage Regulation Avg idle current DCX Maximum starting current (peak DC) DC 3σ (peak AC) AC 3σ Delayed motor start (max) DC 3σ Peak operating current: Typical DCX Maximum DC 3σ Maximum (peak) DC 3σ Notes [5] [1] [6] ST3146855SS 1.5 Gbit mode (Amps) (Amps) +5V +12V [2] ±5% ±5% [2] 0.76 0.56 [3] 0.86 1.97 [3] 1.17 3.40 [1] [4] 0.67 0.03 [1] 0.76 0.88 [1] 0.78 0.91 1.54 2.48 Gen 1.5 data. 0.15A DC and 0.2A AC 12V max start current margin added. ST3146855SS 3 Gbit mode (Amps) (Amps) +5V +12V [2] ±5% ±5% [2] 0.75 0.56 0.86 1.97 1.15 3.34 0.70 0.03 0.80 0.89 0.82 0.91 1.58 2.48 Table 4: ST373455SS DC power requirements Voltage Regulation Avg idle current DCX Maximum starting current (peak DC) DC 3σ (peak AC) AC 3σ Delayed motor start (max) DC 3σ Peak operating current: Typical DCX Maximum DC 3σ Maximum (peak) DC 3σ Notes [5] [1] [6] ST373455SS 1.5 Gbit mode (Amps) (Amps) +5V +12V [2] ±5% ±5% [2] 0.76 0.43 [3] 0.81 1.90 [3] 1.27 3.18 [1] [4] 0.62 0.03 [1] 0.72 0.72 [1] 0.73 0.80 1.54 2.34 ST373455SS 3 Gbit mode (Amps) +5V ±5% 0.94 (Amps) +12V [2] ±5% [2] 0.43 0.80 1.90 1.30 3.22 0.64 0.03 0.76 0.72 0.76 0.80 1.56 2.36 Gen 1.6 data. 0.15A DC and 0.2A AC 12V max start current margin added. [1] Measured with average reading DC ammeter or equivalent sampling scope. Instantaneous +12V current peaks will exceed these values. Power supply at nominal voltage. N (number of drives tested) = 6, 35 24 Cheetah 15K.5 SAS Product Manual, Rev. E

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24
Cheetah 15K.5 SAS Product Manual, Rev. E
Gen 1.5 data. 0.15A DC and 0.2A AC 12V max start current margin added.
Gen 1.6 data. 0.15A DC and 0.2A AC 12V max start current margin added.
[1]
Measured with average reading DC ammeter or equivalent sampling scope. Instantaneous +12V current
peaks will exceed these values. Power supply at nominal voltage. N (number of drives tested) = 6, 35
Table 3:
ST3146855SS
DC power requirements
Notes
ST3146855SS
1.5 Gbit mode
ST3146855SS
3 Gbit mode
(Amps)
(Amps)
(Amps)
(Amps)
Voltage
+5V
+12V [2]
+5V
+12V [2]
Regulation
[5]
±5%
±5% [2]
±5%
±5% [2]
Avg idle current DCX
[1] [6]
0.76
0.56
0.75
0.56
Maximum starting current
(peak DC) DC
3
σ
[3]
0.86
1.97
0.86
1.97
(peak AC) AC
3
σ
[3]
1.17
3.40
1.15
3.34
Delayed motor start (max) DC
3
σ
[1] [4]
0.67
0.03
0.70
0.03
Peak operating current:
Typical DCX
[1]
0.76
0.88
0.80
0.89
Maximum DC
3
σ
[1]
0.78
0.91
0.82
0.91
Maximum (peak) DC
3
σ
1.54
2.48
1.58
2.48
Table 4:
ST373455SS
DC power requirements
Notes
ST373455SS
1.5 Gbit mode
ST373455SS
3 Gbit mode
(Amps)
(Amps)
(Amps)
(Amps)
Voltage
+5V
+12V [2]
+5V
+12V [2]
Regulation
[5]
±5%
±5% [2]
±5%
±5% [2]
Avg idle current DCX
[1] [6]
0.76
0.43
0.94
0.43
Maximum starting current
(peak DC) DC
3
σ
[3]
0.81
1.90
0.80
1.90
(peak AC) AC
3
σ
[3]
1.27
3.18
1.30
3.22
Delayed motor start (max) DC
3
σ
[1] [4]
0.62
0.03
0.64
0.03
Peak operating current:
Typical DCX
[1]
0.72
0.72
0.76
0.72
Maximum DC
3
σ
[1]
0.73
0.80
0.76
0.80
Maximum (peak) DC
3
σ
1.54
2.34
1.56
2.36