Dc Power Requirements; Input Voltage; Power Supply Current (Typical); Figure 53. Input Voltage - IBM IC35L040AVVN07-0 - 40GB IDE Deskstar 120GXP 7200RPM UATA-100 07N9682 Specifications

6.5 DC power requirements

The following voltage specifications apply at the power connector of the drive. Damage to the drive
electronics may result if the power supply cable is connected or disconnected while power is being applied
to the drive (no hot plug/unplug is allowed). Connections to the drive should be made in a low voltage, iso-
lated secondary circuit (SELV). There is no special power on/off sequencing required.

6.5.1 Input voltage

Input voltage
+5 Volts Supply
+12 Volts Supply

Figure 53. Input voltage

Note: To avoid damage to the drive electronics, power supply voltage spikes must not exceed specifi-
cations.

6.5.2 Power supply current (typical)

Power supply current of
120 GB and 100 GB models
(values in milliamps. RMS)
Idle average
Idle ripple (peak-to-peak)
Low RPM idle
Low RPM idle ripple
Unload idle average
Unload idle ripple
1
Seek average
Seek peak
Random R/W average
Random R/W peak
Silent R/W average
Silent R/W peak
Start up (max)
Standby average
Sleep average

Figure 54. Power supply current of 120 GB and 100 GB models

Except for a peak of less than 100 s duration
1
Random seeks at 40% duty cycle
2
Seek duty = 30%, W/R duty = 45%, Idle Duty = 25%
During run and spin up
5V ± 5%
12V +10% –8%
+5 Volts [mA]
Pop Mean
310
370
160
50
160
50
380
600
2
470
790
470
790
740
160
150
Deskstar 120GXP hard disk drive specifications
Absolute max
spike voltage
–0.3 to 7V
–0.3 to 15V
+12 Volts [mA]
Std Dev Pop Mean
5 390
26 370
5 220
6 230
5 280
6 240
6 470
19 820
10 590
22 1800
10 470
22 820
20 1867
3 15
3 15
47
1
Total
[W]
Std Dev
46
6.2
30
26
3.4
23
34
4.2
27
42
7.5
46
42
9.4
110
36
8.0
46
86
1 1.0
1 0.9