Seagate BARRACUDA2 User Manual
Page 17
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ST12450W/WD Installation Guide, Rev. B
15
DC power requirements
Single-ended
Differential
+++++
5V
+++++
12V
+++++
5V
+++++
12V
Voltage regulation
5
±±±±±
5%
±±±±±
5%
2
±±±±±
5%
±±±±±
5%
2
Amps
Maximum operating current
1
1.32
0.91
1.65
0.91
Maximum starting current
Peak DC
3,
6
1.3
2.18
1.43
2.18
Peak AC
3
–
3.1
–
3.1
Delayed motor start (max)
4
1.25
1.5
1.31
1.5
Peak operating current
Typ DC
1,10
1.3
0.84
1.6
0.84
Max DC
1
1.32
0.91
1.65
0.91
Max (peak)
1.4
1.85
2.4
1.85
Track following (DC)
at OD
1
1.3
0.78
1.4
1.85
at ID
1
1.3
0.82
1.4
0.78
Read track
OD DC
1,
13
1.4
0.81
1.9
0.81
AC
1.5
1.16
2.5
1.16
Seeking
Typical DC
1,
12
1.3
1.06
1.4
1.06
Maximum DC
1
1.3
1.14
1.44
1.14
Maximum (peak) AC
1.3
1.85
2.2
1.85
1
Measured with an average reading DC ammeter. Instanta-
neous +12V current peaks will exceed these values.
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