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Setup: PmPPC7448 Setup
10006757-02 PmPPC7448 User’s Manual
2-9
Caution: Do not install the board in a rack or remove the board from a rack while power is applied, at
risk of damage to the board.
Power Requirements
Be sure your power supply is sufficient for the PmPPC7448 circuit board. Standard power is
3.3 volts, however a dual power supply option is available.
Table 2-2 lists the board’s specific
power requirements.
Table 2-2: Power Requirements
Specific PmPPC7448 configurations may draw over 20 watts of power. The configurations
with a faster core CPU frequency and increased DDR memory draw more power and gener-
ate more heat. When monitoring the ambient air temperature increase across the module
(from the inlet side of the PmPPC7448 to the outlet), the temperature can rise approxi-
mately 4-7° C at high airflow (300 lfm) to 5-12° C at low airflow (100 lfm). The system
designer should consider the cumulative effects of installing multiple PMC modules on a
single carrier and ensure adequate airflow.
Environmental Considerations
As with any printed circuit board, be sure that air flow to the board is adequate. Chassis
constraints and other factors greatly affect the air flow rate. The environmental require-
ments are as follows:
Table 2-3: Environmental Requirements
Voltage: Range:
Current
(typical): Watt Requirements/Configuration:
+3.3 V +/- 5% 5.1 amps 1 GHz MPC7448 and 1 GB DDR SDRAM
configuration typically requires 17 watts
Environment: Range: Relative Humidity:
Operating Temperature 0° to +55° Centigrade, ambient
(at board)
Not to exceed 85%
(non-condensing)
Storage Temperature —40° to 85° Centigrade Not to exceed 95%
(non-condensing)
Altitude 0 to 4,000 meters above sea level n/a
Air Flow
1
1. Airflow is required at the processor to maintain junction temperature less than 95° C at specified
ambient temperature.
100 linear feet/minute @ 45° C ambient
200 linear feet/minute @ 55° C ambient
n/a
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