Kontron COMe Eval Carrier T2 - Manual (Page 10)

COM Express® Eval Carrier Type 2
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3.4 Electrical Specification
Supply Voltage
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ATX Main Power 24pin
Power Supply Rise time
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The input voltages shall rise from ≤10% of nominal to within the regulation ranges within 0.1ms to
20ms.
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There must be a smooth and continuous ramp of each DC input voltage from 10% to 90% of its final set-
point following the ATX specification
Supply Voltage Ripple
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Maximum 100 mV peak to peak 0-20MHz
3.5 Environmental Specification
Ambient temperature
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Operating: 0 to +60 °C
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Non-operating: -30 to +85 °C
Humidity
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Operating: 10% to 90% (non condensing)
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Non operating: 5% to 95% (non condensing)
3.6 MTBF
The following MTBF (Mean Time Between Failures) values were calculated using a combination of manufacturer’s
test data, if the data was available, and a Bellcore calculation for the remaining parts. The Bellcore calculation
used is “Method 1 Case 1”. In that particular method the components are assumed to be operating at a 50 %
stress level in a 40° C ambient environment and the system is assumed to have not been burned in.
Manufacturer’s data has been used wherever possible. The manufacturer’s data, when used, is specified at 50°
C, so in that sense the following results are slightly conservative. The MTBF values shown below are for a 40° C in
an office or telecommunications environment. Higher temperatures and other environmental stresses (extreme
altitude, vibration, salt water exposure, etc.) lower MTBF values.
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System MTBF: 264194 hours @ 40°C