Seagate BARRACUDA ST31000640SS Product Manual page 28

Table 3:
ST3750630SS
Voltage
Regulation
Avg idle current DCX
Maximum starting current
(peak DC) DC
(peak AC) AC
Delayed motor start (max) DC 3σ
Peak operating current:
Typical DCX
Maximum DC
Maximum (peak) DC
Table 4:
ST3500620SS
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 or equivalent sampling scope. 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
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] See +12V current profile in Figure 2.
24
DC power requirements
ST3750630SS
3 Gbit mode
Notes (Amps)
+5V
[5] ±5%
[1] [6] 0.60
3σ [3] 0.90
3σ [3] 1.10
[1] [4] 0.60
[1] 0.62
3σ [1] 0.74
3σ 1.15
DC power requirements
3 Gbit mode
Notes (Amps)
+5V
[5] ±5%
[1] [6] 0.60
3σ [3] 0.90
3σ [3] 1.10
3σ [1] [4] 0.60
[1] 0.62
3σ [1] 0.74
3σ 1.15
(Amps)
+12V [2]
±5% [2]
0.50
2.00
3.50
0.17
0.78
0.82
1.75
(Amps)
+12V [2]
±5% [2]
0.50
2.00
3.50
0.17
0.78
0.82
1.75
Barracuda ES.2 SAS Product Manual, Rev. E