Copyright
©
2013
congatec
AG
QMX6m03
16/63
2.5
Power Consumption
The power consumption values listed in this document were measured under a controlled environment. The hardware used for testing includes
a conga-QMX6 module, carrier board for Qseven ARM, TFT monitor, micro-SD card and USB keyboard. The carrier board was powered
externally by a power supply unit so that it does not influence the power consumption value that is measured for the module. The USB keyboard
was detached once the module was configured within the OS. All recorded values were averaged over a 30 second time period. The modules
were cooled by the heatspreader specific to the module variants
Each module was measured while running 32 bit Linaro Ubuntu 11.10. To measure the worst case power consumption, the cooling solution
was removed and the CPU core temperature was allowed to run between 95° and 100°C at 100% workload. The peak current value was then
recorded. This value should be taken into consideration when designing the system’s power supply to ensure that the power supply is sufficient
during worst case scenarios.
Power consumption values were recorded during the following stages:
Linaro Ubuntu 11.10 (32 bit)
• Desktop Idle
• 100% CPU workload
•
100% CPU workload at approximately 100°C peak power consumption
Note
With the linux stress tool, we stressed the CPU to maximum frequency.