26
Savvio 10K.5 FC Product Manual, Rev. D
[1]
Measured with average reading DC ammeter. Instant12V 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 9,936 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 5.
[4]
See +12V current profile in Figure 6.
[5]
This condition occurs when the Motor Start option is enabled and the drive has not yet received a Start Motor com-
mand.
[6]
See paragraph 7.3.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient
response.
[7]
Operating condition is defined as random 8 block reads.
[8]
During idle, the drive heads are relocated every 30 seconds to a random location within the band from three-quarters
to maximum track
Table 5:
DC power requirements for ST9300605FC model
2Gb
4Gb
Notes
(Amps)
(Amps)
(Amps)
(Amps)
Voltage
+5V
+12V [2]
+5V
+12V [2]
Regulation
[6]
±5%
±5% [2]
±5%
±5% [2]
Avg idle current DC
[1] [8]
0.36
0.15
0.38
0.15
Advanced Idle Current
Idle_A
3
σ
0.38
0.16
0.39
0.16
Idle_B
3
σ
0.26
0.15
0.27
0.15
Idle_C
3
σ
0.26
0.09
0.27
0.09
Standby
3
σ
0.26
0.06
0.27
0.06
Maximum starting current
(peak DC) DC
3
σ
[4]
0.61
0.89
0.63
0.89
(peak AC) AC
3
σ
[4]
0.95
1.54
0.99
1.52
Delayed motor start (max) DC
3
σ
[1] [5]
0.57
0.06
0.58
0.06
Peak operating current (random read):
Typical DC
[1] [7]
0.45
0.35
0.47
0.35
Maximum DC
3
σ
[1]
0.47
0.37
0.49
0.37
Maximum (peak) DC
3
σ
1.23
1.48
1.16
1.46
Peak operating current (random write)
Typical DC
0.51
0.33
0.52
0.33
Maximum DC
3
σ
0.53
0.36
0.54
0.36
Maximum (peak) DC
3
σ
1.06
1.48
1.06
1.51
Peak operating current (sequential read)
Typical DC
0.81
0.14
0.83
0.14
Maximum DC
3
σ
0.86
0.15
0.87
0.14
Maximum (peak) DC
3
σ
1.12
0.32
1.15
0.32
Peak operating current (sequential write)
Typical DC
0.89
0.14
0.91
0.14
Maximum DC
3
σ
0.94
0.15
0.95
0.14
Maximum (peak) DC
3
σ
1.20
0.32
1.19
0.30
