Hitachi 7K250 Specifications - Page 43

DC power requirements - sata

Page 43 highlights

6.2.2 Corrosion test The drive shows no sign of corrosion inside and outside of the hard disk assembly and is functional after being subjected to seven days at 50°C with 90% relative humidity. 6.3 DC power requirements Damage to the drive electronics may result if the power supple cable is connected or disconnected to the legacy power connector while power is being applied to the drive (no hot plug/unplug is alloweed). If SATA power supply cable is connected or disconnected to the SATA power connector, hot plug/unplug is allowed. 6.3.1 Input voltage Table 21: Input voltage Input voltage supply2 During run and spin up Absolute max spike voltage1 +5 V 5 V ± 5% -0.3 to 7 V +12 V 12 V + 10% -8% -0.3 to 15 V 1To avoid damage to the drive electronics, power supply voltage spikes must not exceed specifications. 2 +12V should be applied within 60 seconds after +5V is applied to the drive. 6.3.2 Power supply current (typical) Table 22: Power supply current of xxx-GB models Power supply current of 250-GB model values in milliamps, RMS +5 Volts (mA) Pop mean Std dev Idle average 280 12 Idle ripple (peak-to-peak) 230 40 Low RPM idle Low RPM idle ripple 140 7 220 25 Unload idle average Unload idle ripple 140 7 220 25 Random R/W average Random R/W peak 430 9 1252 50 Silent R/W average2 Silent R/W peak 470 9 1252 50 Start up (max) 870 51 Standby average 140 9 Sleep average 100 8 +12 Volts (mA) Pop mean Std dev 470 12 330 20 180 10 270 20 350 13 240 20 660 14 1750 50 470 15 995 40 1840 75 20 3 20 3 Total (W) 7.0 2.9 4.9 10.1 8.0 0.9 0.7 Except for a peak of less than 100 ms duration Deskstar 7K250 Hard Disk Drive Specification 29

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Deskstar 7K250 Hard Disk Drive Specification
29
6.2.2
Corrosion test
The drive shows no sign of corrosion inside and outside of the hard disk assembly and is functional after being sub-
jected to seven days at 50°C with 90% relative humidity.
6.3
DC power requirements
Damage to the drive electronics may result if the power supple cable is connected or disconnected to the legacy
power connector while power is being applied to the drive (no hot plug/unplug is alloweed). If SATA power supply
cable is connected or disconnected to the SATA power connector, hot plug/unplug is allowed.
6.3.1
Input voltage
1
To avoid damage to the drive electronics, power supply voltage spikes must not exceed specifications.
2
+12V should be applied within 60 seconds after +5V is applied to the drive.
6.3.2
Power supply current (typical)
Table 22: Power supply current of xxx-GB models
Except for a peak of less than 100 ms duration
Table 21: Input voltage
Input voltage supply
2
During run and spin up
Absolute max spike voltage
1
+5 V
5 V ± 5%
–0.3 to 7 V
+12 V
12 V + 10% –8%
–0.3 to 15 V
Power supply current of
250-GB model
values in milliamps, RMS
+5 Volts (mA)
+12 Volts (mA)
Total (W
)
Pop mean
Std
dev
Pop mean
Std dev
Idle average
Idle ripple (peak-to-peak)
280
230
12
40
470
330
12
20
7.0
Low RPM idle
Low RPM idle ripple
140
220
7
25
180
270
10
20
2.9
Unload idle average
Unload idle ripple
140
220
7
25
350
240
13
20
4.9
Random R/W average
Random R/W peak
430
1252
9
50
660
1750
14
50
10.1
Silent R/W average
2
Silent R/W peak
470
1252
9
50
470
995
15
40
8.0
Start up (max)
870
51
1840
75
Standby average
140
9
20
3
0.9
Sleep average
100
8
20
3
0.7