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User Guide

COMe-bP5020

4 Power Considerations

4.1 Supply Voltage

Following supply voltage is specified at the COM Express® connector.

Table 37: Supply Voltages

The 5V Standby and the RTC voltage are 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 specifica-

tion.

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-bP5020 is a function of clock frequencies, workload/utilization, temperature

and component variations/tolerances.

The following tables indicate the typical power consumption of the COMe-bP5020 with 2GHz core clock and 8GB DDR3 memory

under various conditions.

Table 38: Workload Dependency

Table 39: Power Consumption vs. Ambient Temperature (U-Boot in Idle)

TYPE RANGE

VCC 8.5V - 18V

(12V nominal)

STANDBY 5V DC +/- 5%

RTC 2.5V - 3.3V

APPLICATIONS POWER CONSUMPTION

U-Boot (idle) 21.1 W

Linux (idle) 20.3 W

Linux (Memtest) 23.5 W

Linux (Drystone) 23.3 W

U-Boot (idle) + GigE 22.1 W

Linux (idle) + GigE 21.3 W

AMBIENT AIR

TEMPERATURE

12V RAIL LOAD

POWER

CONSUMPTION

23° C 1.6 A 21.1 W

40° C 1.94 A 23.3 W

50° C 2.08 A 25.0 W

60° C 2.25 A 27.07 W

65° C 2.36 A 28.3 W

70° C 2.47 A 29.6 W

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 70 71

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