Hitachi travelstar hds723020bla642 用户手册
7K200 SATA OEM Specification
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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.
specifications are applied at the power connector of the drive.
Item
Requirements
Nominal supply
+5 Volt dc
Supply voltage
–0.3 Volt to 6.0 Volt
Power supply ripple (0–20
MHz)
MHz)
1
100 mV p-p max.
Tolerance
2
±5%
Supply rise time
1–100 ms
Watts (RMS Typical)
7
Performance Idle average
3
2.0
Active Idle average
1.0
Low Power Idle average
0.8
Read average
4
2.3
Write average
2.3
Seek average
5
2.6
Standby 0.25
Sleep 0.2
Sleep 0.2
Startup (maximum peak)
6
5.5
Average from power on to
ready
ready
3.8
Table 14. DC Power requirements
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.
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.
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.
7.
“Typical” mean average of the drive population tested at nominal environmental and
voltage conditions.
voltage conditions.