Seagate CONSTELLATION SAS ST9500430SS Product Manual page 31

Table 2:
500GB drive (Standard & SED model)
Voltage
Regulation
Avg idle current DCX
Advanced idle current
Idle_A
Idle_B
Idle_C/ Standby_Y
Standby_Z
Maximum starting current
(peak DC) DC
(peak AC) AC
Delayed motor start (max) DC
Peak operating current (random read):
Typical DCX
Maximum DC
Maximum (peak) DC
Peak operating current (random write)
Typical DCX
Maximum DC
Maximum (peak) DC
Peak operating current (sequential read)
Typical DCX
Maximum DC
Maximum (peak) DC
Peak operating current (sequential write)
Typical DCX
Maximum DC
Maximum (peak) DC
[1] Measured with average reading DC ammeter.
[2] Instantaneous +12V current peaks will exceed these values.
[3] Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient.
[4] 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.
Constellation SAS Product Manual, Rev. E
DC power requirements
3.0 Gbit mode
Notes (Amps)
+5V
[5] ±5%
[1] [7] 0.33
0.32
0.23
0.23
0.23
3σ [5] 0.59
3σ [5] 0.90
3σ [1] [6] 0.55
[1] [6] 0.41
3σ [1] 0.44
3σ 0.98
0.46
3σ 0.49
3σ 1.22
0.73
3σ 0.77
3σ 1.04
0.79
3σ 0.84
3σ 1.20
6.0 Gbit mode
(Amps) (Amps) (Amps)
+12V [4] +5V +12V [4]
±5% [2] ±5% ±5% [2]
0.10 0.34 0.10
0.10 0.34 0.10
0.08 0.24 0.08
0.05 0.24 0.05
0.02 0.25 0.02
0.65 0.60 0.65
0.87 0.97 1.03
0.03 0.58 0.03
0.14 0.43 0.14
0.15 0.46 0.14
0.54 1.04 0.54
0.14 0.47 0.14
0.14 0.50 0.14
0.56 1.22 0.56
0.12 0.75 0.12
0.12 0.80 0.12
0.20 1.12 0.20
0.12 0.80 0.12
0.12 0.85 0.12
0.20 1.22 0.20
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