Kontron COMe-cP2020 - Manual (Page 74)

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COMe-P2020 User Guide
74
4 Power Considerations
4.1 Electrical Specifications
4.1.1 Supply Voltage
Following supply voltage is specified at the COM Express® connector.
The RTC voltage is not mandatory for operation.
4.2 Power Supply Rise Time
The input voltages shall rise from ≤ 10% of nominal to within the regulation ranges within 0.1ms to 20ms. There must be a
smooth and continuous ramp of each DC input voltage from 10% to 90% of its final set-point as specified in the ATX specifi-
cation.
4.3 Supply Voltage Ripple
The supply voltage ripple must not be greater than 100 mV peak to peak 0 – 20 MHz.
4.4 Power Consumption
The maximum power consumption of the COMe-cP2020 is a function of clock frequencies, workload/utilization, tempera-
ture and component variations/tolerances.
The following tables indicate the typical power consumption of the COMe-cP2020 with 1.2 GHz core clock and 2GB DDR3
memory under various conditions.
Table 4-1: Supply Voltages
TYPE RANGE
VCC
10.8V - 13.2V
(12V nominal)
RTC 2.5V - 3.3V
Table 4-2: Workload Dependency
APPLICATIONS POWER CONSUMPTION
U-Boot (idle) 7.4 W
Linux (idle) 6.1 W
Linux (with memtester) 9.6 W
Table 4-3: Power Consumption vs. Ambient Temperature (Standard Board Variant)
AMBIENT AIR
TEMPERATURE
12V RAIL LOAD POWER CONSUMPTION
-5° C 0.72 A 8.6 W
25° C 0.80 A 9.6 W
60° C 0.83 A 10.0 W