Seagate ST3300457FC Cheetah 15K.6 FC Product Manual - Page 32
Table 6, ST3146356FC, DC power requirements, Notes, Table 7, ST3146756FC
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Table 6: ST3146356FC DC power requirements Voltage Regulation Avg idle current DCX Maximum starting current (peak DC) DC (peak AC) AC Delayed motor start (max) DC Peak operating current: Typical DCX Maximum DC Maximum (peak) DC Notes [5] [1] [7] 1 Gbit (Amps) +5V ±5% 0.53 2 Gbit (Amps) (Amps) +12V [2] +5V ±5% [2] ±5% 0.53 0.56 4 Gbit (Amps) (Amps) +12V [2] +5V ±5% [2] ±5% 0.53 0.63 (Amps) +12V [2] ±5% [2] 0.53 3σ [3] 0.82 1.75 0.68 1.75 0.74 1.75 3σ [3] 1.11 3.42 0.95 3.81 1.00 3.58 3σ [1] [4] 0.62 0.04 0.64 0.04 0.71 0.04 [1] [6] 0.62 0.96 0.65 0.96 0.72 0.95 3σ [1] 0.64 0.96 0.65 0.98 0.73 0.97 3σ 1.12 2.34 1.16 2.32 1.22 2.34 Table 7: ST3146756FC DC power requirements Voltage Regulation Avg idle current DCX Maximum starting current (peak DC) DC (peak AC) AC Delayed motor start (max) DC Peak operating current: Typical DCX Maximum DC Maximum (peak) DC Notes [5] [1] [7] 3σ [3] 3σ [3] 3σ [1] [4] [1] [6] 3σ [1] 3σ 1 Gbit (Amps) +5V ±5% 0.52 0.60 0.99 0.56 0.50 0.53 1.18 (Amps) +12V [2] ±5% [2] 0.54 2 Gbit (Amps) +5V ±5% 0.55 4 Gbit (Amps) (Amps) +12V [2] +5V ±5% [2] ±5% 0.53 0.60 1.77 0.63 1.77 0.94 3.72 0.90 3.81 1.25 0.04 0.60 0.04 0.65 0.95 0.56 0.95 0.62 0.97 0.57 0.96 0.62 2.36 1.24 2.34 1.32 (Amps) +12V [2] ±5% [2] 0.53 1.77 3.93 0.04 0.95 0.97 2.34 [1] Measured with average reading DC ammeter. Instantaneous +12V 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 15000 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 1. [4] This condition occurs when the Motor Start option is enabled and the drive has not yet received a Start 26 Cheetah 15K.6 FC Product Manual, Rev. D