1.3 Power Requirements

(4) Current Requirements and Power Dissipation

Table 1.3 lists the current and power dissipation (typical).

Table 1.3 Current and power dissipation

 

 

Typical RMS Current

 

Typical Power (*3)

Spin up (*1)

 

0.9 A

 

4.5 W

Idle

 

130 mA

 

0.65 W

R/W (on track) (*2)

Read 400 mA / Write 420mA

 

Read 2.0 W / Write 2.1 W

Seek (*5)

 

460 mA

 

2.3 W

Standby

 

50 mA

 

0.25 W

Sleep

 

20 mA

 

0.1 W

Energy

 

 

0.007 W/GB

Efficiency (*4)

 

 

 

(rank E)

*1

Maximum current at starting spindle motor.

 

*2

Current and power level when the operation (command) that accompanies a

 

transfer of 63 sectors is executed 3 times in 100 ms

*3

Power requirements reflect nominal values for +5 V power.

*4

Energy efficiency based on the Law concerning the Rational Use of Energy

 

indicates the value obtained by dividing power consumption by the storage

 

capacity. (Japan only)

 

*5

The seek average current is specified based on three operations per 100

 

msec.

 

C141-E202-01EN

1-7

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Fujitsu MHU2100AT manual Current and power dissipation