FUJITSU MHK2090AT - Manual (Page 27)

Device Overview
1-6 C141-E088-03EN
(3) Current Requirements and Power Dissipation
Table 1.3 lists the current and power dissipation.
Table 1.3 Current and power dissipation
Typical RMS Current Typical Power (*3)
MHJ Series MHK Series MHJ Series MHK Series
Spin up (*1) 0.9 A 0.9 A 4.5 W 4.5 W
Idle 170 mA 170 mA 0.85 W 0.85 W
R/W (on track) (*2) 460 mA 460 mA 2.3 W 2.3 W
Seek (*5) 460 mA 460 mA 2.3 W 2.3 W
Standby 56 mA 56 mA 0.28 W 0.28 W
Sleep 20 mA 20 mA 0.1 W 0.1 W
Energy
Consumption
Efficiency (*4) — — 0.047 W/GB 0.071 W/GB
*1 Current at starting spindle motor.
*2 At 30% disk accessing.
*3 Power requirements reflect nominal values for +5V power.
*4 Energy Consumption Efficiency =
Idle power dissipation / Total record capacity (GB)
*5 The seek average current is specified based on three operations per 100
msec.
(4) Current fluctuation (Typ.) at +5V when power is turned on
Figure 1.1 Current fluctuation (Typ.) at +5V when power is turned on