Seagate Cheetah 18XL, Product Manual

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Cheetah 18XL Product Manual, Rev. A 23
Figure 3. Typical ST318404 drive +12 V current profile
Figure 4. Typical ST39204 drive +12 V current profile
0.0 2 4 6 8 10 12 14 16 18 20
0.0
0.5
1.0
1.5
2.0
2.5
3.0
A
Seconds
T2 T4
T3
T
AC Envelope
Nominal (average)
DC curve
+12 Volt Current during spindle start – Typical Amperes
T5 T1
0.0 2 4 6 8 10 12 14 16 18 20
0.0
0.5
1.0
1.5
2.0
2.5
3.0
A
Seconds
AC Envelope
Nominal (average)
DC curve
+12 Volt Current during spindle start – Typical Amperes