LSI 25083 ,

3-20 MegaRAID SAS RAID Controller Characteristics

•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

3.3.4.5 Power Supply Requirements for the SAS 9261 RAID Controller

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). Tabl e 3.1 1 lists

the power supply for the RAID controller for each of the three states at

the different voltages.

Table3.12 Power Supply for SAS 9261 RAID Controllers

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)

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