Seagate ST3300457FC Cheetah 15K.5 FC Product Manual - Page 32
Table 3, DC power requirements for ST3146855FC model, Notes, Table 4, DC power requirements
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Table 3: DC power requirements for ST3146855FC model 1 Gbit Notes (Amps) Voltage +5V Regulation [5] ±5% Avg idle current DCX [1] [7] 0.77 Maximum starting current (peak DC) DC 3σ [3] 0.78 (peak AC) AC 3σ [3] 1.18 Delayed motor start (max) DC 3σ [1] [4] 0.44 Peak operating current: Typical DCX [1] [6] 0.62 Maximum DC 3σ [1] 0.75 Maximum (peak) DC 3σ 1.54 (Amps) +12V [2] ±5% [2] 0.54 2.08 3.70 0.03 0.89 0.93 2.68 2 Gbit (Amps) +5V ±5% 0.79 0.80 1.17 0.47 0.76 0.77 1.54 (Amps) +12V [2] ±5% [2] 0.53 4 Gbit (Amps) +5V ±5% 0.84 2.08 0.86 3.70 1.27 0.03 0.52 0.88 0.52 0.94 0.80 2.70 1.60 (Amps) +12V [2] ±5% [2] 0.53 2.08 3.65 0.03 0.87 0.93 2.62 Table 4: DC power requirements for ST373455FC model 1 Gbit Notes (Amps) Voltage +5V Regulation [5] ±5% Avg idle current DCX [1] [7] 0.76 Maximum starting current (peak DC) DC 3σ [3] 0.77 (peak AC) AC 3σ [3] 1.10 Delayed motor start (max) DC 3σ [1] [4] 0.45 Peak operating current: Typical DCX [1] [6] 0.69 Maximum DC 3σ [1] 0.71 Maximum (peak) DC 3σ 1.42 (Amps) +12V [2] ±5% [2] 0.41 2 Gbit (Amps) +5V ±5% 0.83 2.02 0.80 3.51 1.17 0.03 0.49 0.73 0.74 0.79 0.77 2.46 1.54 (Amps) +12V [2] ±5% [2] 0.42 4 Gbit (Amps) +5V ±5% 0.84 2.02 0.84 3.57 1.29 0.03 0.53 0.74 0.78 0.79 0.81 2.48 1.56 (Amps) +12V [2] ±5% [2] 0.41 2.02 3.48 0.03 0.76 0.80 2.50 [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 Motor command. [5] See paragraph 6.2.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient response. [6] Operating condition is defined as random 8 block reads at 309 s I/Os per second for ST3300655FC and 24 Cheetah 15K.5 FC Product Manual, Rev. F