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6/ Electrical Specification
6.1. Supply Voltage
one ATX Main Power 24pin
Power supply for the module: the ATX_12V P4 connector provides a wide range of input,
depending on module specification.
6.2. 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 following the ATX specification
If any of the supply voltages drops below the allowed operating level longer than the
specified hold-up time, all the supply voltages should be shut down and left OFF for a time
long enough to allow the internal board voltages to discharge sufficiently.
If the OFF time is not observed, parts of the board or attached peripherals may work
incorrectly or even suffer a reduction of MTBF.
The minimum OFF time depends on the implemented PSU model and other electrical factors
and needs to be measured individually for each case.
6.3. Supply Voltage Ripple
Maximum 100 mV peak to peak 0-20MHz
To protect external power lines of peripheral devices, make sure that the wires have the
right diameter to withstand the maximum available current. The enclosure of the peripheral
device has to fulfill the fire-protection requirements of IEC/EN62368.
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COMe Eval Carrier T7 (A2T7) User Guide Rev 1.1
// 44
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