Heat/Power Dissipation - Seagate ST11200N Product Manual

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Note. All times and currents are typical. See Table 7.2-1 for maximum current requirements.
1.0
5V
Current
.5
CH1 GND
2.0
1.5
12V
Current
1
T
.5
CH2 GND
0
Figure 7.2.2-1. Typical ST11200N/ND/NC family drive +5 V and +12 V current profile
7.3

Heat/power dissipation

For drives with single ended interface circuits, typical operating power dissipation is 11 watts (37.5 BTUs
per hour) of DC power average at nominal voltages. Typical power dissipation under idle conditions is 9
watts (30.8 BTUs per hour).
For drives having differential interface circuits, typical operating power dissipation is 13 watts (44 BTUs per
hour) of DC power average at nominal voltages. Typical power dissipation under idle conditions is 10 watts
(34.2 BTUs per hour).
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
T1
T2
2 4 6
Seconds
T3 T4
T5
8 10 12 14
T6
Channel 1
2 s .5 Amps
Channel 2
2 s .5 Amps
16 18