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Copyright ©2000 Toshiba corporation. All rights reserved.
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6. POWER REQUIREMENTS
6.1 Supply Voltage
6.1.1 Supply for Logic
Allowable voltage 5V + 5%
Allowable noise/ripple 100 mV p-p or less
6.1.2 Supply for Motor
Allowable voltage 5V + 5%
Allowable noise/ripple 100 mV p-p or less
6.2 Power Consumption
Average (note 3) Maximum (note 4)
Start 2.7 W Typical 5.6 W (note5)
Seek (note 7) 2.3 W Typical 3.8 W (note6)
Read / Write(note 8) 1.9 W Typical 3.0 W
Active idle (note 1) 0.78 W Typical 0.9 W
Low power idle (note 9) 0.58 W Typical 0.8 W
Stand- by (note 2) 0.25 W Typical 0.3 W
Sleep 0.1 W Typical 0.15 W
(note 1) Motor is rotating at normal speed but none of Read, Write or Seek is executed.
(note 2) Motor is not rotating and heads are unloaded on the ramp.
(note 3) Under normal condition ( 25
o
C, 101.3 kPa ( 1,013 mb ) ) and 5V +
0%.
(note 4) Under all the specified conditions.
(note 5) Only when motor start retry, it may last for 2 seconds.
(note 6) Peak value during seek operation
(note 7) The seek average current is specified based on three operations per 100 ms.
(note 8) The read/write current is specified based on three operations of 63 sector read/write per 100 ms.
(note 9) Motor is rotating at normal speed but heads are unloaded on the ramp.
6.3 Energy Consumption Efficiency
Energy consumption efficiency Average(W/GB) Max.(W/GB) Classification
Power consumption at Low power idle /
Capacity
0.097 0.116 D
Energy consumption efficiency is calculated in accordance with the law regarding efficiency of energy consumption
:Energy saving law,1979 law number 49.
Calculation of Energy consumption is dividing consumed energy by the capacity.
The consumed energy and capacity shall be measured and specified by the Energy saving low.
6.4 Power Sequence
If the 5V Logic is separated from 5V Motor, both lines should be turned on and off at the same time
within the time period of one second .