1.3

Power Requirements

(3) Current Requirements and Power Dissipation

 

 

 

 

 

Table 1.5 lists the current and power dissipation.

 

 

 

 

Table 1.5 Current and power dissipation

 

 

 

 

 

 

 

 

 

 

 

Typical RMS Current

Typical Power (*3)

 

 

 

 

 

 

 

 

 

 

 

MHE Series

MHF Series

MHE Series

 

MHF Series

 

 

 

 

 

 

 

 

 

 

Spin up (*1)

0.9 A

0.9 A

4.5 W

 

4.5 W

 

 

 

 

 

 

 

 

 

 

Idle

190 mA

190 mA

0.95 W

 

0.95 W

 

 

 

 

 

 

 

 

 

 

R/W (*2)

430 mA

430 mA

2.15 W

 

2.15 W

 

 

 

 

 

 

 

 

 

 

Standby

70 mA

70 mA

0.35 W

 

0.35 W

 

 

 

 

 

 

 

 

 

 

Sleep

26 mA

26 mA

0.13 W

 

0.13 W

 

 

 

 

 

 

 

 

 

 

Energy

0.0001 W/MB

 

0.0004 W/MB

 

 

Consumption

 

 

 

 

 

 

 

Efficiency (*4)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*1 Current at starting spindle motor.

*2 Power requirements reflect nominal values for +5V power.

*3 At 30% disk accessing.

*4 Energy Consumption Efficiency =

Idle power dissipation / Total record capacity (MB)

(4) Current fluctuation (Typ.) at +5V when power is turned on

Figure 1.1 Current fluctuation (Typ.) at +5V when power is turned on

C141-E057-01EN

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Fujitsu MHF2043AT, MHE2043AT, MHF2021AT, MHE2064AT manual Current and power dissipation