Filter
Top Products
Intel
®
IQ31244 Customer Reference Board
10 User’s Manual
1.2 Electrical Specifications
The electrical specifications of the IQ31244 are given in Table 2.
Most ATX power-supply units (PSUs) regulate off the 5 V signal. When no devices are drawing
from the 5 V supply, the ATX PSU does not supply 3.3 V correctly to the motherboard. To
compensate for this, it is recommended that a load (for example, an SATA hard drive) be added on
the 5 V rail from the PSU.
Note: The included 300 W power supply is sufficient to power up to four drives at one time. An
additional power supply is required to provide power for more than four drives. To estimate the
required power supply, estimate that each SATA drive draws approximately 2.8 A on the 12 V
supply.
1.2.1 SATA Drive Enclosures
It is highly recommended that the SATA drives are housed in an enclosure to reduce the
environmental noise that can affect performance. An example of a SATA four-drive enclosure is
the DE400 model from Storcase*:
http://www.storcase.com/dataexpress/datasheet/dexpress_de400.pdf.
1.3 Environmental Specifications
Note: A small amount of airflow is required to prevent the IQ31244 operating temperature from
exceeding 55 °C. When the ATX chassis cover is removed, an external fan is required to provide
adequate air flow within the chassis.
Table 2. Intel
®
IQ31244 Customer Reference Board Power Requirements
Voltage
Current
(Typical)
Current
(Maximum)
+3.3 V 3.19 Amps 4.56 Amps
+5 V 1.6 mAmps 2.28 mAmps
+12 V 0.0 Amps 0.0 Amps
-12 V 0.0 Amps 0.0 Amps
Table 3. Environmental Specifications
Characteristic Range
Operating temperatures 0–55 °C
Relative humidity (non-condensing) 0–95%
Storage temperatures -55–125 °C