Electrical Characteristics

All power is supplied to the HBA 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). The following table lists the power supply information for the controller for each of the three states at the different voltages.

Table 5-3 Power Supply for the HBA

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