Seagate ST38421A Product Manual - Page 17
Typical current profile
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U4 Family Product Manual, Rev. D Power Mode Spinup Seek (Random, no read/write) Operating Idle Standby/Sleep Typical Watts RMS - 7.0 5.7 3.1 0.8 1.7.1.1 Typical current profile Figure 1 shows a typical current profile. Current (amps) 9 Typical Amps RMS 5V 12V - 1.5 (peak) 0.39 0.42 0.34 0.33 0.24 0.16 0.14 0.01 1.2 1.0 0.8 0.6 0.4 0.2 0 1 2 3 4 5 6 7 8 Time (seconds) Figure 1. Typical startup and operation current profile
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U4 Family Product Manual, Rev. D
9
1.7.1.1
Typical current profile
Figure 1 shows a typical current profile.
Figure 1. Typical startup and operation current profile
Power Mode
Typical Watts
RMS
Typical Amps RMS
5V
12V
Spinup
—
—
1.5 (peak)
Seek (Random, no
read/write)
7.0
0.39
0.42
Operating
5.7
0.34
0.33
Idle
3.1
0.24
0.16
Standby/Sleep
0.8
0.14
0.01
0
0.2
0.4
0.6
0.8
1.0
1.2
Current (amps)
1
2
3
4
5
6
7
8
Time (seconds)