Chapter 3. Specifications
24 LSI 3ware 9750 SATA+SAS RAID Controller Card Installation Guide
12 V is used in the charging circuitry for the optional battery pack
on the optional iBBU battery-backed daughter card. If the iBBU
daughter card is mounted, the following power consumption figures
apply: During fast charging of the battery pack: 230 mA in the 12
V
supply current.
Power Supply Requirements for the 9750-24i4e
and 9750-16i4e Controller Cards
All power is supplied to the controller through the PCI Express
3.3
V rails and the 12 V rail. Onboard switching regulator circuitry
operating from the 3.3 V rails and the 12 V rail provide the
necessary voltages. The following states determine the typical
current consumption of the 9750-24i4e and 9750-16i4e controller
cards:
State 1: During verify unit (consistency check) of all RAID 5
logical drives simultaneously
State 2: While sitting idle at the prompt
State 3: During a stress test
State 4: During a drive stress test and BBU is under fast charge
The supply voltages are 12 V ± 8 percent (from PCI edge connector
only) and 3.3 V ± 9 percent (from PCI edge connector only).
Table 4 lists the power supplies for the controller for each of the
four states at the different voltages.
Table 4: Power Supplies for SATA+SAS 9750-24i4e and
9750-16i4e Controller Cards
PCI Edge Connector State 1 State 2 State 3 State 4
3.3 V supply 1.139 A 1.174 A 1.225 A 1.356 A
12 V supply 1.466 A 1.426 A 1.487 A 1.773 A
3.3 V auxiliary supply 0.048 A 0.026 A 0.214 A 0.168 A
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