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24 Cheetah T10 SAS Product Manual, Rev. A
0.15A DC and 0.2A AC 12V max start current margin added..
0.15A DC and 0.2A AC 12V max start current margin added.
[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
Table 3: ST3146755SS DC power requirements
Notes
ST3146755SS
1.5 Gbit mode
ST3146755SS
3 Gbit mode
(Amps) (Amps) (Amps) (Amps)
Voltage +5V +12V [2] +5V +12V [2]
Regulation [5] ±5% ±5% [2] ±5% ±5% [2]
Avg idle current DCX [1] [6] 0.80 0.57 0.78 0.57
Maximum starting current
(peak DC) DC 3σ [3] 0.87 2.12 0.87 1.93
(peak AC) AC 3σ [3] 1.20 3.49 1.21 3.45
Delayed motor start (max) DC 3σ [1] [4] 0.64 0.03 0.68 0.03
Peak operating current:
Typical DCX [1] 0.78 0.76 0.81 0.76
Maximum DC 3σ [1] 0.78 0.78 0.82 0.78
Maximum (peak) DC 3σ 1.60 2.54 1.62 2.62
Table 4: ST373355SS DC power requirements
Notes
ST373355SS
1.5 Gbit mode
ST373355SS
3 Gbit mode
(Amps) (Amps) (Amps) (Amps)
Voltage +5V +12V [2] +5V +12V [2]
Regulation [5] ±5% ±5% [2] ±5% ±5% [2]
Avg idle current DCX [1] [6] 0.78 0.44 0.77 0.44
Maximum starting current
(peak DC) DC 3σ [3] 0.84 1.91 0.84 1.91
(peak AC) AC 3σ [3] 1.18 3.17 1.12 3.23
Delayed motor start (max) DC 3σ [1] [4] 0.66 0.03 0.66 0.03
Peak operating current:
Typical DCX [1] 0.75 0.64 0.78 0.63
Maximum DC 3σ [1] 0.77 0.65 0.80 0.66
Maximum (peak) DC 3σ 1.50 2.32 1.54 2.32