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Constellation ES.1 SAS Product Manual, Rev. E 25
Note. See table notes on the next page.
Table 4: 500GB drive (Standard & SED model) DC power requirements
Notes
3.0Gb mode 6.0Gb mode
(Amps) (Amps)
Voltage +5V +12V [4] +5V +12V [4]
Regulation [5] ±5% ±5% [2] ±5% ±5% [2]
Avg idle current DCX [1] [7] 0.36 0.21 0.36 0.21
Advanced idle current
Idle_A 0.36 0.21 0.36 0.21
Idle_B 0.25 0.19 0.25 0.19
Idle_C/ Standby_Y 0.25 0.11 0.25 0.12
Standby_Z 0.25 0.02 0.26 0.02
Transition current
Idle_A - Active 0.62 1.48 0.64 1.42
Idle_B - Active 0.62 1.32 0.70 1.35
Idle_C - Active 0.66 2.04 0.84 2.05
Standby - Active 0.88 2.46 0.86 2.53
Maximum starting current
(peak DC) DC 3σ [5] 0.61 1.92 0.61 1.93
(peak AC) AC 3σ [5] 0.83 2.53 0.96 2.59
Delayed motor start (max) DC 3σ [1] [6] 0.44 0.02 0.44 0.02
Peak operating current (random read):
Typical DCX [1] [6] 0.44 0.37 0.44 0.38
Maximum DC 3σ [1] 0.44 0.39 0.50 0.41
Maximum (peak) DC 3σ 1.18 1.48 1.29 1.45
Peak operating current (random write)
Typical DCX 0.54 0.28 0.54 0.29
Maximum DC 3σ 0.59 0.31 0.59 0.41
Maximum (peak) DC 3σ 1.32 1.47 1.32 1.47
Peak operating current (sequential read)
Typical DCX 0.77 0.20 0.77 0.20
Maximum DC 3σ 0.84 0.21 0.84 0.21
Maximum (peak) DC 3σ 1.07 0.40 1.07 0.43
Peak operating current (sequential write)
Typical DCX 0.95 0.20 0.95 0.20
Maximum DC 3σ 1.01 0.21 1.01 0.21
Maximum (peak) DC 3σ 1.40 0.38 1.38 0.38
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