Electrical Specifications; Current Requirements And Power Dissipation; Table 2-7. Wde2170 Current Requirements And Power Dissipation; Table 2-8. Wde4360 Current Requirements And Power Dissipation - Western Digital WDE4360 Technical Reference Manual

WD Enterprise WDE2170/WDE4360
2.4.

Electrical Specifications

2.4.1. Current Requirements and Power Dissipation

Table 2-7. WDE2170 Current Requirements and Power Dissipation

Operating
Mode Population Mean + 4 Sigma
12 VDC
peak DC
Spin-up
1.22A
mean DC
Seek
1
50 ops/s 390 mA
2
Idle 255 mA
3
365 mA
Read/Write
Notes: All values at 25 C, 5.0V, 12.0V input.
1
Example of doing 50 random ops/sec.
2
The idle condition is defined by the motor running at the full rated RPM with no seeking or read/write
operations being performed. The drive was track following on the OD cylinder for these
measurements.
3
This is for a ratio of four reads per one write.
4
Differential option available on 68-pin models only.

Table 2-8. WDE4360 Current Requirements and Power Dissipation

Operating
Mode Population Mean + 4 Sigma
12 VDC
peak DC
Spin-up
1.24A
mean DC
Seek
1
50 ops/s 520 mA
2
390 mA
Idle
3
500 mA
Read/Write
Notes: All values at 25 C, 5.0V, 12.0V input.
1
Example of doing 50 random ops/sec.
2
The idle condition is defined by the motor running at the full rated RPM with no seeking or read/write
operations being performed. The drive was track following on the OD cylinder for these
measurements.
3
This is for a ratio of four reads per one write.
4
Differential option available on 68-pin models only.
4079-001045 Rev. B
Current Current
Population Mean
5 VDC
12 VDC
4
SE/Diff.
peak DC
635/780 mA
1.15A
mean DC
645/795 mA
345 mA
625/785 mA 210 mA
645/795 mA 325 mA
Current
Population Mean
5 VDC
12 VDC
4
SE/Diff.
peak DC
625/790 mA
1.16A
mean C
625/790 mA
480 mA
610/790 mA 350 mA
625/790 mA 460 mA
RELEASED 04-08-97
Power
Pop Mean + 4 Sigma
5 VDC
SE/Diff.
4
SE/Diff.
___
580/760 mA
585/770 mA 7.65/8.70 W
570/760 mA 5.96/6.85 W
585/770 mA 7.65/8.70 W
Current Power
Pop Mean + 4 Sigma
5 VDC
SE/Diff.
4
SE/Diff.
___
595/725 mA
600/735 mA 9.22/9.95 W
585/730 mA 7.60/8.40 W
600/735 mA 9.22/9.95 W
Specifications
Power
Population Mean
4 4
SE/Diff.
___
7.05/8.14 W
5.35/6.29 W
7.05/8.14 W
Power
Population Mean
4 4
SE/Diff.
___
8.71/9.38 W
7.06/7.80 W
8.71/9.38 W
11