Dc Power Requirements; Input Voltage; Power Supply Current (Typical); Figure 50. Input Voltage - IBM DTLA-305040 - Deskstar 41.1 GB Hard Drive Specifications

7.5 DC power requirements

The following voltage specifications apply at the drive power connector. 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, isolated
secondary circuit(SELV). There is no special power on/off sequencing required.

7.5.1 Input voltage

Input voltage
+5 Volts Supply
+12 Volts Supply

Figure 50. Input voltage

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

7.5.2 Power supply current (typical)

DTLA-305010, -305020, -305030, -305040
Idle Average
Idle ripple (peak-to-peak)
Seek peak
1
Seek average
Start up (max)
Random R/W peak
Random R/W average
Standby average
Sleep average
Except for a peak of less than 100usc duration
1
Randon seeks at 40% duty cycle
2
Seek duty = 30%, W/R duty = 45%, Idle Duty = 25%

Figure 51. Power supply current (1 0f 2)

During run and spin up
5V ± 5%
12V +10% –8%
+5 Volts
(amps RMS)
0.26
0.29
0.44
0.27
0.98
0.94
2
0.41
0.27
0.18
Deskstar 40GV & 75GXP hard disk drive specifications
Absolute max
spike voltage
7V
15V
+12 Volts Total
(amps RMS) (watts)
0.30 4.9
0.43
1.91
0.54 7.9
1.86
1.91
0.54 8.6
0.017 1.6
0.017 1.1
48
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