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COMe-P2020 User Guide

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

1 2 ... 69 70 71 72 73 74 75 76 77 78 79 ... 105 106

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Kontron COMe-cP2020 Manual do Utilizador Página 74