Avago Technologies MegaRAID SAS 8204ELP - Manual (Page 64)

3-20 MegaRAID SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
3.3.4.3 Power Supply Requirements for the SAS 8880EM2 RAID Controllers
All power is supplied to the SAS 8880EM2 RAID controller through the
PCI Express 3.3V rails and the 12V rail. Onboard switching regulator
circuitry operating from the 3.3V rails and the 12V rail provide the
necessary voltages. The following states determine the typical current
consumption of the controller:
•
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 12V ± 8 percent (from PCI edge connector only)
and 3.3V ± - 9 percent (from PCI edge connector only).
Table 3.9 lists
the power supply for the RAID controller for each of the three states at
the different voltages.
Table 3.11 Power Supply for the SAS 8880EM2 RAID Controller
Note: +12V is used in the charging circuitry for the battery pack
on the optional iBBU battery-backed daughter card. If the
BBU daughter card is mounted, the following power
consumption figures apply:
– During trickle charging of the battery pack: N/A (no
trickle charge for Li-ION)
– During fast charging of the battery pack: 230mA in +12V
current
3.3.4.4 Power Supply Requirements for the SAS 8888ELP RAID Controller
All power is supplied to the SAS 8888ELP RAID controller through the
PCI Express 3.3V rails and the 12V rail. Necessary voltages are provided
by onboard switching regulator circuitry operating from the 3.3V rails and
the 12V rail. The following states determine the typical current
consumption of the controller:
PCI Edge Connector State 1 State 2 State 3
3.3V supply 330mA 330mA 330mA
+12V supply 1.00A 1.81A 1.53A
3.3V auxiliary supply 30mA 30mA 30mA