Travelstar 7K100 Hard Disk Drive Specification
24
6.2 DC power requirements
Connection to the product should be made in a safety extra low voltage (SELV) circuits. The voltage specifications
are applied at the power connector of the drive.
Footnotes:
1
The maximum fixed disk ripple is measured at the 5 volt input of the drive.
2
The disk drive shall not incur damage for an over voltage condition of +25% (maximum duration of
20 ms) on the 5 volt nominal supply.
3
The idle current is specified at an inner track.
4
The read/write current is specified based on three operations of 63 sector read/write per 100 ms.
5
The seek average current is specified based on three operations per 100 ms.
6
The worst case operating current includes motor surge.
6.2.1 Power consumption efficiency
Note:
Power consumption efficiency is calculated as Power Consumption of Low Power Idle in Watts/Capacity
(GB).
Table 15: DC power requirements
Item
Requirements
Nominal supply
+5Volt DC
Supply voltage
–0.3 Volt to 6.0 Volt
Power supply ripple (0–20 MHz)
1
100mV p-p max.
Tolerance
2
±5%
Supply rise time
7–100 ms
Watts (RMS typical)
Performance Idle average
3
1.8
Active Idle average
1.1
Low Power Idle average
0.85
Read average
4
2.0
Write average
2.0
Seek average
5
2.3
Standby
0.20
Sleep
0.1
Startup (max. peak)
6
5.5
Average from power on to ready
3.8
Table 16: Power consumption efficiency
Capacity
100 GB
80 GB
60 GB
Power Consumption
Efficiency (Watts/GB)
0.0085
0.0106
0.0142
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