Power Supply For Sas 9261 Raid Controllers - LSI MegaRAID SAS 9240-4i User Manual

3.3.4.5 Power Supply Requirements for the SAS 9261 RAID Controller
3-20
•
Temperature range: +10 ° C to +60 ° C without battery backup unit
•
Temperature range: +10 ° C to +44.5 ° C with iBBU battery backup
The parameters for the non-operating (such as storage and transit)
environment for these controllers are:
•
Temperature range: − 30° C to +80° C without the battery backup unit
•
Temperature range: 0° C to +45° C with the battery backup unit
All power is supplied to the SAS 9261 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 drive 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).
the power supply for the RAID controller for each of the three states at
the different voltages.
Table 3.12

Power Supply for SAS 9261 RAID Controllers

PCI Edge Connector
3.3V supply
+12V supply
3.3V auxiliary supply
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)
MegaRAID SAS RAID Controller Characteristics
Copyright © 2009 by LSI Corporation. All rights reserved.
State 1 State 2
330mA 330mA
1.00A 1.81A
30mA 30mA
Table 3.11 lists
State 3
330mA
1.53A
30mA