Seagate Enterprise Capacity 3.5 HDD/Constellation ES Product Manual page 27

Table 4 500GB drive (Standard & SED model) DC power requirements
Voltage
Regulation
Avg idle current DCX
Advanced idle current
Idle_A
Idle_B
Idle_C/ Standby_Y
Standby_Z
Transition current
Idle_A - Active
Idle_B - Active
Idle_C - Active
Standby - Active
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
See table notes on the next page.
Note.
[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 7200 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.
[5] See +12V current profile in Figure 3.
[6] This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup primitive.
[7] See paragraph 6.3.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient response.
[8] Operating condition is defined as random 8 block reads.
[9] During idle, the drive heads are relocated every 60 seconds to a random location within the band from three-quarters to maximum
track.
C ES.1 SAS P
ONSTELLATION
3s
3s
3s
3s
3s
3s
3s
3s
3s
3s
3s
M , R . G
RODUCT ANUAL EV
3.0Gb mode
Notes
(Amps)
+5V +12V [4]
[5] ±5% ±5% [2]
[1] [7] 0.36 0.21
0.36 0.21
0.25 0.19
0.25 0.11
0.25 0.02
0.62 1.48
0.62 1.32
0.66 2.04
0.88 2.46
[5] 0.61 1.92
[5] 0.83 2.53
[1] [6] 0.44 0.02
[1] [6] 0.44 0.37
[1] 0.44 0.39
1.18 1.48
0.54 0.28
0.59 0.31
1.32 1.47
0.77 0.20
0.84 0.21
1.07 0.40
0.95 0.20
1.01 0.21
1.40 0.38
6.0Gb mode
(Amps)
+5V +12V [4]
±5% ±5% [2]
0.36 0.21
0.36 0.21
0.25 0.19
0.25 0.12
0.26 0.02
0.64 1.42
0.70 1.35
0.84 2.05
0.86 2.53
0.61 1.93
0.96 2.59
0.44 0.02
0.44 0.38
0.50 0.41
1.29 1.45
0.54 0.29
0.59 0.41
1.32 1.47
0.77 0.20
0.84 0.21
1.07 0.43
0.95 0.20
1.01 0.21
1.38 0.38
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