Seagate 4.55GB PATA ST34520LW Manual De Usuario
Los códigos de productos
ST34520LW
Medalist Pro Product Manual, Rev. D
21
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:
Note.
All times and currents are typical. See Table 2a for maximum current requirements.
Figure 3a.
Typical Medalist Pro family drive +12 V current profile
Figure 3b.
Typical Medalist Pro family drive +5 V current profile
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.
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.
0
0.5
1
Time in Seconds
+12V Start Current
1.5
Current Amps
–2.00
–1.40
–0.80
–0.20
0.39
0.99
1.59
2.19
2.79
3.38
3.98
4.58
5.18
5.78
6.37
6.97
7.57
8.17
8.77
9.36
9.96
10.56
1
1.16
1
1.76
12.35
12.95
13.55
14.15
14.75
15.34
15.94
16.54
17.14
17.74
2
2.5
T1
T2
T3
T
T4
0
Time in Seconds
+5V Start Current
Current Amps
–2.00
–1.39
–0.79
–0.19
0.42
1.02
1.62
2.22
2.83
3.43
4.03
4.64
5.24
5.84
6.45
7.05
7.65
8.26
8.86
9.46
10.07
10.67
1
1.27
1
1.88
12.48
13.08
13.69
14.29
14.89
15.50
16.10
16.70
17.30
17.91
0.7
0.6
0.5
0.4
0.3
0.2
0.1
T2
T1
T3
T4
T