Lenovo ServeRAID M5120, User Manual

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3-8 ServeRAID M5120 SAS/SATA Controller Characteristics
3.3.4 Power Supply Requirements for the ServeRAID M5120 SAS/SATA
Controller
All power is supplied to the 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 3.6 lists
the power supply for the controller for each of the three states at the
different voltages.
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: N/A (no
trickle charge for Li-ION).
– During fast charging of the battery pack: 250mA in +12V
current.
Table 3.6 Power Supply for the ServeRAID M5120 SAS/SATA
Controller
PCI Edge Connector State 1 State 2 State 3
3.3V supply 0.864A 0.989A 0.986A
+12V supply 0.832A 0.6388A 0.633A
3.3V auxiliary supply 0.08A 0.0312A 0.040A