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
3.3.4.27 Power Supply Requirements for the MegaRAID SAS 9286-8e RAID Controller
All power is supplied to the MegaRAID SAS 9286-8e 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 disk 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 controller for each of the three states at the
different voltages.
3.3.4.28 Operating and Nonoperating Conditions for the MegaRAID SAS 9286-8e RAID Controller
The operating (thermal and atmospheric) conditions for the MegaRAID SAS 9286-8e RAID controller are as follows:
Relative humidity range is 20 percent to 80 percent noncondensing.
Airflow must be at least 200 linear feet per minute (LFPM) to avoid operating the LSISAS2208 processor above the
maximum ambient temperature.
Temperature range: +10 °C to +60 °C without the battery backup unit.
Temperature range: +10 °C to +45 °C with the iBBU battery backup.
The parameters for the nonoperating (such as storage and transit) environment for the controller are as follows:
Temperature range: –30 °C to +80 °C without the battery backup unit.
Temperature range: 0 °C to +45 °C with the iBBU battery backup.
Table 37 Power Supply for MegaRAID SAS 9286-8e RAID Controllers
PCI Edge Connector State 1 State 2 State 3
3.3V supply 934mA 901mA 893mA
+12V supply 807mA 542mA 541mA
3.3V auxiliary supply
(iBBU applications only)
14mA 43mA 43mA
NOTE The charging circuitry for the battery pack on the optional iBBU battery-backed daughter card uses
+12V. If the iBBU daughter card is mounted on the controller, 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: 250mA in +12V current.
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