Current Profile; Figure 3A. Typical Medalist Pro Family Drive +12 V Current Profile; Figure 3B. Typical Medalist Pro Family Drive +5 V Current Profile - Seagate ST34520N - Medalist 4.55 GB Hard Drive Product Manual

Medalist Pro Product Manual, Rev. D
6.2.3 12 V - Current profile
Figure 3a identifies the drive +5 V and +12 V current profile. The current during the various times is as shown:
T - Power is applied to the drive.
T1 - Controller self tests are performed and spindle position sense is performed.
T2 - Spindle begins to accelerate under current limiting after performing drive internal
diagnostics. See Note 1 of Table 2.
T3 - The heads move from the landing zone to the data area.
T4 - Drive is ready for reading and writing.
Note. All times and currents are typical. See Table 2a for maximum current requirements.
T
2.5
2
1.5
1
0.5
0
Figure 3a. Typical Medalist Pro family drive +12 V current profile
T
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
Figure 3b. Typical Medalist Pro family drive +5 V current profile
T1 T2
T1
T2
+12V Start Current
T3
Time in Seconds
+5V Start Current
T3
Time in Seconds
21
T4
T4