Power Supply Current (Typical); Table 37.Power Supply Current Of Xxx-Gb Models - Hitachi T7K250 - Deskstar - Hard Drive Specifications

7.3.2 Power supply current (typical)

Table 37: Power supply current of xxx-GB models
Power supply current of
160 GB-250 GB model
(PATA models)
Idle average
Idle ripple (peak-to-peak)
Low RPM idle
Low RPM idle ripple
Unload idle average
Unload idle ripple
Random R/W average
Random R/W peak
2
Silent R/W average
Silent R/W peak
Start up (max)
Standby average
Sleep average
Except for a peak of less than 100 ms duration
1
Random seeks at 40% duty cycle
2
Seek duty = 30%, W/R duty = 45%, Idle duty = 25%
Power supply current of 160
GB and 250 GB model
(SATA models)
Idle average
Idle ripple (peak-to-peak)
Low RPM idle
Low RPM idle ripple
Unload idle average
Unload idle ripple
Random R/W average
Random R/W peak
+5 Volts (mA)
Pop mean Std
dev
280 10
300 40
160 6
220 20
160 6
220 20
500 6
1200 30
500 6
1200 30
900 50
150 9
100 10
+5 Volts (mA)
Pop mean Std
dev
470 10
230 40
350 6
220 25
350 6
220 20
650 9
1450 30
Deskstar T7K250 Hard Disk Drive Specification
+12 Volts (mA)
Pop mean Std dev
320 12
300 20
160 6
300 20
270 6
400 20
600 10
1700 40
400 8
1000 40
1880 50
15 2
15 2
+12 Volts (mA)
Pop mean Std dev
320
300
160
300
270
400
600
1700
55
Total (W)
5.24
2.72
4.04
9.70
7.3
0.93
0.68
Total (W)
12 6.19
20
10 3.67
20
13 4.99
20
12 10.45
50