LSI Corporation
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6Gb/s MegaRAID SAS RAID Controllers User Guide
August 2012
Chapter 3: MegaRAID SAS RAID Controller Characteristics
Technical Specifications
3.3.4.9 Power Supply Requirements for the MegaRAID SAS 9265-8i RAID Controller
All power is supplied to the MegaRAID SAS 9265-8i 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 provides 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 the PCI edge connector only) and 3.3V ± 9 percent (from the PCI edge
connector only). The following table lists the power supply for the RAID controller for each of the three states at the
different voltages.
3.3.4.10 Operating and Nonoperating Conditions for the MegaRAID SAS 9265-8i RAID Controller
For the MegaRAID SAS 9265-8i RAID controller, the operating (thermal and atmospheric) conditions are as follows:
Relative humidity range is 5 percent to 90 percent noncondensing (20 percent to 80 percent noncondensing for
the RAID controllers)
Airflow must be at least 200 linear feet per minute (LFPM) to avoid operating the LSISAS2108 processor above the
maximum ambient temperature
Temperature range: +10 °C to +60 °C without the battery backup unit
Temperature range: +10 °C to +44.5 °C with the iBBU battery backup
The parameters for the nonoperating (such as storage and transit) environment for these controllers are as follows:
Temperature range: −30 °C to +80 °C without the battery backup unit
Temperature range: 0 °C to +45 °C with the battery backup unit
Table 28 Power Supply for the MegaRAID SAS 9265-8i RAID Controller
PCI Edge Connector State 1 State 2 State 3
3.3V supply 956mA 919mA 916mA
+12V supply 809mA 555mA 559mA
3.3V auxiliary supply 10mA 39mA 19mA
NOTE The charging circuitry for the battery pack on the optional iBBU battery-backed daughter card uses
+12V. If the BBU daughter card is mounted, the following power consumption figures apply:
During trickle charging of the battery pack: Not applicable (no trickle charge for Li-ION).
During fast charging of the battery pack: 230mA in +12V current.
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