Avago Technologies 3ware SAS 9750-4i - Manual (Page 24)

Chapter 3. 9750 Controller Card Specifications
18 3ware 9750 SATA+SAS RAID Controller Card Installation Guide
Electrical Characteristics
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 controller card:
„ State 1: During a hard reset
„ State 2: During a disk stress test
„ State 3: While sitting idle at the DOS prompt
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 3 lists the power supply for the controller for each of the three
states at the different voltages.
+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 rise in
+12 V supply current.
Table 3: Power Supply for the 9750 Controller
PCI Edge Connector State 1 State 2 State 3
3.3 V supply 330 mA 330 mA 330 mA
12 V supply 1.00 A 1.81 A 1.53 A
3.3 V auxiliary supply 30 mA 30 mA 30 mA