Seagate ST3450056FC (FDE) ユーザーズマニュアル

26

Cheetah 15K.6 FC Product Manual, Rev. C

    

 

 

[1]

Measured with average reading DC ammeter. Instantaneous +12V current peaks will exceed these val-
ues. 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 

Voltage

+5V

+12V [2]

+5V

+12V [2]

+5V

+12V [2]

Regulation

[5]

±5%

±5% [2]

±5%

±5% [2]

±5%

±5% [2]

Avg idle current DCX

[1] [7]

0.53

0.53

0.56

0.53

0.63

0.53

Maximum starting current

(peak DC) DC

3

σ

[3]

0.82

1.75

0.68

1.75

0.74

1.75

(peak AC) AC

3

σ

[3]

1.11

3.42

0.95

3.81

1.00

3.58

Delayed motor start (max) DC

3

σ

[1] [4]

0.62

0.04

0.64

0.04

0.71

0.04

Peak operating current:

     Typical DCX

[1] [6]

0.62

0.96

0.65

0.96

0.72

0.95

     Maximum DC

3

σ

[1]

0.64

0.96

0.65

0.98

0.73

0.97

     Maximum (peak) DC

3

σ

1.12

2.34

1.16

2.32

1.22

2.34

Voltage

+5V

+12V [2]

+5V

+12V [2]

+5V

+12V [2]

Regulation

[5]

±5%

±5% [2]

±5%

±5% [2]

±5%

±5% [2]

Avg idle current DCX

[1] [7]

0.52

0.54

0.55

0.53

0.60

0.53

Maximum starting current

(peak DC) DC

3

σ

0.60

1.77

0.63

1.77

0.94

1.77

(peak AC) AC

3

σ

0.99

3.72

0.90

3.81

1.25

3.93

Delayed motor start (max) DC

3

σ

[1] [4]

0.56

0.04

0.60

0.04

0.65

0.04

Peak operating current:

     Typical DCX

[1] [6]

0.50

0.95

0.56

0.95

0.62

0.95

     Maximum DC

3

σ

0.53

0.97

0.57

0.96

0.62

0.97

     Maximum (peak) DC

3

σ

1.18

2.36

1.24

2.34

1.32

2.34